84 results on '"Alejandro Meza"'
Search Results
2. Statin indication according to the 2019 World Health Organization cardiovascular disease risk charts and carotid ultrasound in Mexican mestizo rheumatoid arthritis patients
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Dionicio A. Galarza-Delgado, Iris J. Colunga-Pedraza, Jose R. Azpiri-Lopez, Natalia Guajardo-Jauregui, Alejandra B. Rodriguez-Romero, Julieta Loya-Acosta, Alejandro Meza-Garza, Jesus A. Cardenas-de la Garza, Salvador Lugo-Perez, and Jessica N. Castillo-Treviño
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Rheumatoid arthritis ,Cardiovascular risk ,Carotid atherosclerosis ,Ultrasound imaging ,Diseases of the musculoskeletal system ,RC925-935 ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Abstract Background We aimed to assess the concordance of recommendation for initiating statin therapy according to the 2019 World Health Organization (WHO) cardiovascular disease (CVD) risk charts and to the presence of carotid plaque (CP) identified with carotid ultrasound in Mexican mestizo rheumatoid arthritis (RA) patients, and to determine the proportion of patients reclassified to a high cardiovascular risk after the carotid ultrasound was performed. Methods This was a cross-sectional study nested of a RA patients’ cohort. A total of 157 Mexican mestizo RA patients were included. The cardiovascular evaluation was performed using the 2019 WHO CVD risk charts (laboratory-based model) for the Central Latin America region. A carotid ultrasound was performed in all patients. The indication to start statin therapy was considered if the patient was classified as high risk, moderate risk if > 40 years with total cholesterol (TC) > 200 mg/dl or LDL-C > 120 mg/dl, and low risk if > 40 years with TC > 300 mg/dl, according to the WHO CVD risk chart or if the patient had carotid plaque (CP). Cohen’s kappa (k) coefficient was used to evaluate the concordance between statin therapy initiation. Results Initiation of statin therapy was considered in 49 (31.2%) patients according to the 2019 WHO CVD risk charts and 49 (31.2%) patients by the presence of CP. Cardiovascular risk reclassification by the presence of CP was observed in 29 (18.9%) patients. A slight agreement (k = 0.140) was observed when comparing statin therapy recommendations between 2019 WHO CVD risk charts and the presence of CP. Conclusion The WHO CVD risk charts failed to identify a large proportion of patients with subclinical atherosclerosis detected by the carotid ultrasound and the concordance between both methods was poor. Therefore, carotid ultrasound should be considered in the cardiovascular evaluation of RA patients.
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- 2022
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3. Manifestaciones orales en pacientes con COVID 19
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Ma. Magdalena Patiño Suárez, Alejandro Meza Castillejos, and Ángel Gutiérrez Zavala
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Manifestaciones orales ,COVID 19 ,SARS-CoV-2 ,Social sciences (General) ,H1-99 - Abstract
El 2019-nCoV se llama oficialmente SARS-CoV-2 y causa la enfermedad llamada COVID 19, la cual es considerada pandemia por la Organización Mundial de la Salud (OMS). La COVID 19 es una infección que produce un síndrome respiratorio agudo severo que se ha caracterizado por fiebre, síntomas respiratorios y gastrointestinales, así como otras manifestaciones sistémicas. En este contexto, se han ido reportando manifestaciones clínicas en pacientes con SARS-CoV-2 positivos que han ido enriqueciendo el conocimiento sobre las características del cuadro clínico, sin embargo, uno de los aspectos escasamente documentados es la semiología a nivel de la cavidad oral. Nuevas evidencias muestran la relevancia de la cavidad oral como un reservorio del virus por lo que desempeña un papel fundamental en el diagnóstico, evolución y transmisión epidemiológica de los patrones de infección del COVID-19. El objetivo del presente es realizar una revisión y análisis de las evidencias disponibles en referencia a las manifestaciones orales en el contexto de la infección de SARS-CoV-2.
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- 2022
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4. Atypical Mycobacteriosis Due to Mycobacterium abscessus subsp. massiliense: Our Experince
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Carmen Rodríguez-Cerdeira, Rigoberto Hernández-Castro, Carlos Daniel Sánchez-Cárdenas, Roberto Arenas, Alejandro Meza-Robles, Sonia Toussaint-Caire, Carlos Atoche-Diéguez, and Erick Martínez-Herrera
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Mycobacterium abscessus complex ,Mycobacterium abscessus subsp. massiliense ,non-tuberculous mycobacteria ,mesotherapy ,cutaneous infections ,molecular identification ,Medicine - Abstract
Background: Members of Micobacterium. abscessus complex comprises three subspecies (M. abscessus subsp. Abscessus, M. abscessus subsp. Bolletii, and M. abscessus subsp. Massiliense) and are a rapid-growing nontuberculous mycobacteria present in different aquatic habitats and soil. It often causes a wide spectrum of infections involving pulmonary infections, surgical wound infections, and infections related to mesotherapy, catheters, hemodialysis devices, endocarditis, and disseminated infections in immunocompromised individuals. Methods: In this article we comment on the most relevant aspects of nine patients with skin lesions caused by M. abscessus subsp. massiliense infection. Clinical characteristics, histopathology, and molecular identification were performed. Results: The patients in the clinical cases presented a history of trauma, tattoos, and physical therapy techniques. The most common treatments were minocycline and clindamycin, doxycycline, ceftriaxone, cephalexin, moxifloxacin, rifampicin, and trimethoprim-sulfamethoxazole. The evolution of the treated patients was acceptable, except for one patient, who showed a partial improvement. M. massiliense were identified in all clinical cases using a species-specific PCR. Conclusion: Our series consisted of nine cases of skin biopsies recorded in different years; for this reason, we do not have all the data necessary for a complete description, in particular in four cases, causing limitations in the manuscript, especially in the therapy used and the evolution of patients due to lack of follow-up.
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- 2022
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5. Impacto en la densidad aparente del suelo provocado por el tránsito de búfalos (Bubalus bubalis) en arrastre de madera
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Verónica Villalobos-Barquero and Alejandro Meza-Montoya
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Human ecology. Anthropogeography ,GF1-900 ,Natural history (General) ,QH1-278.5 - Abstract
La degradación de la estructura del suelo producto del aprovechamiento de plantaciones forestales constituye uno de los aspectos más importantes a considerar durante la producción de madera reforestada. Entre los factores que más acentúan esta degradación se encuentra el método de extracción empleado, por esta razón, se evaluó el efecto sobre el suelo provocado por el tránsito constante de los búfalos de agua (Bubalus bubalis), durante la operación de arrastre de madera. El estudio se realizó en terrenos propiedad de pequeños agricultores de la región Huetar Caribe de Costa Rica, específicamente en Sahara de Batán, Limón. Se empleó un diseño de bloques completos al azar con dos tratamientos y 4 repeticiones por tratamiento, con el cual se evaluó el paso constante de los animales por las pistas de arrastre. Se determinó la densidad aparente del suelo en cuatro pistas de extracción de madera, esto en cuatro fincas. Las muestras de suelo fueron recolectadas por medio del método del cilindro. Se aplicó la prueba de normalidad, una prueba F para igualdad de varianzas basada en dos muestras y se realizó una comparación de medias. Un total de 32 muestras de suelo fueron estudiadas de las cuales 16 correspondieron a suelo disturbado y las restantes 16 al testigo. La densidad aparente promedio para el suelo disturbado fue de 1.071 g/cm3 mientras que el promedio para las muestras testigo fue de 1.005 g/cm3. Finalmente, se comprobó que ambas densidades aparentes no fueron significativamente diferentes (p-value de 0.0824).
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- 2019
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6. Mechanical Optimization of Concrete with Recycled PET Fibres Based on a Statistical-Experimental Study
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Alejandro Meza, Pablo Pujadas, Laura Montserrat Meza, Francesc Pardo-Bosch, and Rubén D. López-Carreño
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recycled fibres ,PET bottles ,fibre reinforced concrete ,optimization ,statistical analysis ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Discarded polyethylene terephthalate (PET) bottles have damaged our ecosystem. Problems of marine fauna conservation and land fertility have been related to the disposal of these materials. Recycled fibre is an opportunity to reduce the levels of waste in the world and increase the mechanical performance of the concrete. PET as concrete reinforcement has demonstrated ductility and post-cracking strength. However, its performance could be optimized. This study considers a statistical-experimental analysis to evaluate recycled PET fibre reinforced concrete with various fibre dose and aspect ratio. 120 samples were experimented under workability, compressive, flexural, and splitting tensile tests. The results pointed out that the fibre dose has more influence on the responses than its fibre aspect ratio, with statistical relation on the tensional toughness, equivalent flexural strength ratio, volumetric weight, and the number of fibres. Moreover, the fibre aspect ratio has a statistical impact on the tensional toughness. In general, the data indicates that the optimal recycled PET fibre reinforced concrete generates a superior performance than control samples, with an improvement similar to those reinforced with virgin fibres.
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- 2021
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7. Costo de producción de carbón vegetal con tres tipos de hornos.
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Sayra Navas-O., Alejandro Meza-M., and Gustavo Jiménez-S.
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Technology - Abstract
Se presenta la experiencia del Instituto Tecnológico de Costa Rica en cuanto a la producción de carbón vegetal con hornos de colmena, transportables y de rabo caliente. Se incluyen los resultados de un estudio comparativo entre el horno de colmena y el transportable, bajo las condiciones específicas del asentamiento campesino de El Indio, en la Rita de Pococí. Además se incluye una evaluación preliminar del horno de rabo caliente, en las condiciones específicas de la Finca Los Lotes en Tres Ríos.
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- 2016
8. Estudio experimental de caracterización mecánica del concreto reforzado con fibras de acero y de polipropileno
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Alejandro Meza, José Ortiz, Lorenzo Peralta, Jesús Pacheco, Juan Soto, Sabás Rangel, Raudel Padilla, and Jesús Alvarado
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Concreto reforzado con fibras ,fibras de acero ,fibras sintéticas ,pisos industriales ,propiedades mecánicas ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Technology (General) ,T1-995 - Abstract
En este artículo se presentan los resultados de un estudio experimental de caracterización de concretos reforzados con fibras de acero y polipropileno para ser utilizados en pisos industriales, evaluando  parámetros como resistencia a compresión, módulo de elasticidad, tenacidad a compresión, resistencia a flexión, tenacidad a flexión, resistencia residual a flexión y energía de fractura. El programa de ensayos de caracterización consistió en la elaboración de probetas cilíndricas y prismáticas de concreto reforzado con fibras incluyendo nueve tipos de fibras: cinco de acero y cuatro sintéticas o de polipropileno. Así mismo se fabricaron probetas de concreto sin ningún tipo de refuerzo como parámetro de referencia, tomando como base un concreto utilizado para pisos industriales de 40 MPa de resistencia a flexión. De los resultados se observó que la forma y longitud de las fibras tienen influencia en el desarrollo de resistencia a flexión y otras propiedades mecánicas como la ductilidad, ya que la fibra de acero con extremos con ganchos mostró una mejor adherencia con el concreto, mientras que la fibra de copolímero tipo recta y polímeros tipo ondulada generaron un mejor desempeño en el concreto. Finalmente se observó una concordancia entre los valores obtenidos de tenacidad a compresión y a flexión.    Â
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- 2015
9. Obstructions in Vascular Networks: Relation Between Network Morphology and Blood Supply.
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Aimee M Torres Rojas, Alejandro Meza Romero, Ignacio Pagonabarraga, Rui D M Travasso, and Eugenia Corvera Poiré
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Medicine ,Science - Abstract
We relate vascular network structure to hemodynamics after vessel obstructions. We consider tree-like networks with a viscoelastic fluid with the rheological characteristics of blood. We analyze the network hemodynamic response, which is a function of the frequencies involved in the driving, and a measurement of the resistance to flow. This response function allows the study of the hemodynamics of the system, without the knowledge of a particular pressure gradient. We find analytical expressions for the network response, which explicitly show the roles played by the network structure, the degree of obstruction, and the geometrical place in which obstructions occur. Notably, we find that the sequence of resistances of the network without occlusions strongly determines the tendencies that the response function has with the anatomical place where obstructions are located. We identify anatomical sites in a network that are critical for its overall capacity to supply blood to a tissue after obstructions. We demonstrate that relatively small obstructions in such critical sites are able to cause a much larger decrease on flow than larger obstructions placed in non-critical sites. Our results indicate that, to a large extent, the response of the network is determined locally. That is, it depends on the structure that the vasculature has around the place where occlusions are found. This result is manifest in a network that follows Murray's law, which is in reasonable agreement with several mammalian vasculatures. For this one, occlusions in early generation vessels have a radically different effect than occlusions in late generation vessels occluding the same percentage of area available to flow. This locality implies that whenever there is a tissue irrigated by a tree-like in vivo vasculature, our model is able to interpret how important obstructions are for the irrigation of such tissue.
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- 2015
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10. Estimación del valor real y del valor de mercado en pie de la plantación forestal
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Olman Murillo, Alejandro Meza, and José Manuel Cabrera
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forest plantations ,forest appraisal ,logging potential ,standing value ,pilón ,hieronyma alchorneoides ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
Se presenta una metodología para la estimación del valor de plantaciones forestales en pie, basada en el valor real y el de mercado. El valor real lo constituyen el volumen, la calidad, la edad y la especie. El volumen se descompone en clases diamétricas y categorías de calidad. El valor real descuenta un 10% por cada disminución en la categoría de calidad de la troza o árbol. Así también, se descuenta al valor real la categoría de tamaño de la troza (efecto en el porcentaje de rendimiento en aserrío en relación con la clase diamétrica). Finalmente, a las plantaciones menores a 10 años se les descuenta el factor edad (calidad de su madera). El valor de mercado se ajusta al valor real con base en 7 parámetros que definen su potencial de aprovechamiento y transporte del producto de la plantación: 1) escala de la plantación; 2) distancia al sitio de transformación de la madera; 3) acceso a la plantación dentro de la finca; 4) topografía y pendiente; 5) pedregosidad; 6) malezas y 7) densidad de la plantación. Se presenta un ejemplo real de valoración de una plantación de pilón (Hieronyma alchorneoides) ubicada en Sarapiquí, Heredia.
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- 2004
11. Progresa y el empoderamiento de las mujeres: estudio de caso en Vista Hermosa, Chiapas
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Alejandro Meza Ojeda, Esperanza Tuñón Pablos, Dora Elia Ramos Muñoz, and Edith Michel Kauffer
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Economic theory. Demography ,HB1-3840 ,Demography. Population. Vital events ,HB848-3697 - Abstract
El presente trabajo pretende hacer una revisión y analizar las corresponsabilidades que lleva a cabo el Programa de Educación, Salud y Alimentación (Progresa) enfocada a la creación de condiciones de posibilidad que pudiesen estar incrementando rasgos de empoderamiento en las mujeres beneficiarias del programa, a partir del modelo tridimensional de Rowlands. Es un estudio de caso realizado en una comunidad de los Altos de Chiapas. El estudio gira en torno a la discusión actual respecto a las políticas públicas con perspectiva de género, el combate a la pobreza y la articulación con procesos de empoderamiento de las beneficiarias. El análisis de los resultados se realizó contrastando las bases de sustento del programa con la tríada dimensional de Rowlands y los rasgos que potencian el empoderamiento.
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- 2002
12. Modelo de producción forestal basado en la integración bosque-industria
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Alejandro Meza and Gustavo Flores
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No disponible/Not available ,Human ecology. Anthropogeography ,GF1-900 ,Natural history (General) ,QH1-278.5 - Abstract
No disponible/Not available
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- 2002
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13. Estudio experimental de caracterización mecánica del concreto reforzado con fibras de acero y de polipropileno
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Alejandro Meza de Luna, José Ángel Ortiz Lozano, Lorenzo Peralta Jaime, Jesús Pacheco Martínez, Juan José Soto Bernal, Sabás H Rangel Martínez, Raudel Padilla Ceniceros, and Jesús Alvarado Flores
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concreto reforzado con fibras ,fibras de acero ,fibras sintéticas ,pisos industriales ,propiedades mecánicas ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Technology (General) ,T1-995 - Abstract
En este artículo se presentan los resultados de un estudio experimental de caracterización de concretos reforzados con fibras de acero y polipropileno para ser utilizados en pisos industriales, evaluando parámetros como resistencia a compresión, módulo de elasticidad, tenacidad a compresión, resistencia a flexión, tenacidad a flexión, resistencia residual a flexión y energía de fractura. El programa de ensayos de caracterización consistió en la elaboración de probetas cilíndricas y prismáticas de concreto reforzado con fibras incluyendo nueve tipos de fibras: cinco de acero y cuatro sintéticas o de polipropileno. Asímismo se fabricaron probetas de concreto sin ningún tipo de refuerzo como parámetro de referencia, tomando como base un concreto utilizado para pisos industriales de 40 MPa de resistencia a flexión. De los resultados se observó que la forma y longitud de las fibras tienen influencia en el desarrollo de resistencia a flexión y otras propiedades mecánicas como la ductilidad, ya que la fibra de acero con extremos con ganchos mostró una mejor adherencia con el concreto, mientras que la fibra de copolímero tipo recta y polímeros tipo ondulada generaron un mejor desempeño en el concreto. Finalmente se observó una concordancia entre los valores obtenidos de tenacidad a compresión y a flexión.
14. El edentulismo y dentición funcional en adultos mayores de Tuxtla Gutierrez, Chiapas
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Magdalena, Patiño Suárez María, Alejandro, Meza Castillejos, and Ángel, Gutiérrez Zavala
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- 2019
15. Hipoplasia del lóbulo hepático izquierdo asintomático, hallazgo transquirúrgico, tomográfico y patológico Presentación de una rara entidad
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Alejandra Núñez-Venzor, Sara Parraguirre-Martínez, Asya ZubillagaMares, Alejandro Meza-Robles, Erika Barlandas-Quintana, Erika M. Hernández-Montiel, and Carlos Valenzuela-Salazar
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General Medicine - Abstract
Background: Abnormalities of liver morphology are rare, divided into two categories: those resulting from overgrowth of liver tissue, such as the Riedel lobe and other accessory lobes, and those with poor liver development include agenesis, hypoplasia and aplasia of the hepatic lobes. Presentation of the case: 57-year-old man, subjected to laparoscopic programmed inguinal surgery, finding liver hypoplasia. Conclusions: Hepatic hypoplasia is rare, has no symptoms or long-term clinical repercussions, is usually an incidental finding during an imaging study or during an abdominal surgical procedure.
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- 2022
16. An Overview of the Application of Harmony Search for Chemical Engineering Optimization
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Alejandro Meza, Zong Woo Geem, Octavio Del-Mazo-Alvarado, Adrian Bonilla-Petriciolet, and Rosa María Fonseca-Pérez
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General Chemical Engineering - Abstract
Harmony search algorithm and its variants have been used in several applications in medicine, telecommunications, computer science, and engineering. This article reviews the global and multi-objective optimization for chemical engineering using harmony search. The main features of the HS method and several of its popular variants and hybrid versions including their relevant algorithm characteristics are described and discussed. A variety of global and multi-objective optimization problems from chemical engineering and their resolution using HS-based methods are also included. These problems involve thermodynamic calculations (phase stability analysis, phase equilibrium calculations, parameter estimation, and azeotrope calculation), heat exchanger design, distillation simulation, life cycle analysis, and water distribution systems, among others. Remarks on future developments of HS and its related algorithms for global and multi-objective optimization in chemical engineering are also provided in this review. HS is a reliable and promising stochastic optimizer to resolve challenging global and multi-objective optimization problems for process systems engineering.
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- 2022
17. Electrical behavior of Au/IrO2/Si heterostructures.
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Alejandro Avila García, Alejandro Meza Serrano, and Gabriel Romero-Paredes Rubio
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- 2010
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18. Molecular identification of yeasts from the order Trichosporonales causing superficial infections
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Gustavo Acosta-Altamirano, Alejandro Meza-Robles, Gabriela Moreno-Coutiño, Roberto Arenas, María del Rocío Reyes-Montes, Tania Vite-Garín, Erick Martínez-Herrera, Esperanza Duarte-Escalante, and María Guadalupe Frías-De-León
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Cryptococcus neoformans ,0303 health sciences ,Phylogenetic tree ,biology ,030306 microbiology ,Basidiomycota ,Trichosporon asahii ,Dermatomycosis ,biology.organism_classification ,Trichosporonosis ,medicine.disease ,Microbiology ,Yeast ,03 medical and health sciences ,Infectious Diseases ,White piedra ,Trichosporon ,medicine ,Humans ,Phylogeny - Abstract
Background The molecular reclassification of the order Trichosporonales placed the medically relevant Trichosporon species into three genera of the family Trichosporonaceae: Cutaneotrichosporon, Trichosporon, and Apiotrichum. From the clinical and epidemiological standpoint, it is important to identify any species of the family Trichosporonaceae because they present different antifungal susceptibility profiles. In Mexico, little is known about trichosporonosis etiology because the fungi are identified through phenotypic methods. Aims To identify at a molecular level 12 yeast isolates morfologically compatible with Trichosporon, obtained from patients with superficial infections. Methods The yeast isolates were obtained from patients with white piedra, onychomycosis, and hand and foot dermatomycosis, and were identified morphologically and genotypically (sequencing of the IGS1 region and phylogenetic analysis using the Maximum Likelihood Method). The phylogenetic analysis included 40 yeast sequences from the order Trichosporonales and one from Cryptococcus neoformans as outgroup. Results Based on the molecular analysis, we identified three (25%) Trichosporon inkin isolates, two (16.7%) Trichosporon asteroides, two (16.7%) Cutaneotrichosporon mucoides, and one each (8.3%) of Trichosporon aquatile, Trichosporon asahii, Apiotrichum montevideense, Cutaneotrichosporon cutaneum, and Cutaneotrichosporon jirovecii. Conclusions The molecular characterization of the isolates showed a broad diversity of species within the order Trichosporonales, particularly among onychomycosis. It is essential to identify these yeasts at the species level to delve into their epidemiology.
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- 2021
19. COVID-19: conocimientos y explicaciones causales desarrolladas por la población mexicana. Resultados preliminares
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José Alejandro Meza Palmeros, María Graciela Freyermuth Enciso, and Gabriel Armando Torres López
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Marketing ,Pharmacology ,Organizational Behavior and Human Resource Management ,Strategy and Management ,Drug Discovery ,Pharmaceutical Science - Abstract
El objetivo del trabajo es conocer, describir y analizar los conocimientos y las concepciones causales desarrolladas por la población mexicana ante la pandemia de COVID-19. Se presentan los resultados preliminares en el marco de una investigación más amplia, dirigida a indagar acerca de la percepción colectiva del riesgo ante tal situación. Se diseñó y aplicó una encuesta digital que fue respondida por 963 personas de una muestra por conveniencia, iniciada a partir de las redes de los autores del artículo. Se identificó que los conocimientos que la población manifiesta tienen que ver predominantemente con aspectos epidemiológicos (hasta en un 67%) y clínicos (52%) de la pandemia. En cuanto a la causalidad, las respuestas de los encuestados fueron agrupadas en cuatro modelos explicativos: moral (40.3%), determinista (38.7%), agencial (17.8%) y xenofóbico (3.1%). La limitación más importante del estudio radica en que al ser una encuesta difundida por medios digitales, se tuvo poco control sobre la muestra. El trabajo presenta hallazgos que contribuyen a la comprensión de los comportamientos poblacionales que la pandemia ha suscitado en la población mexicana, y que pueden ser insumos para el diseño de estrategias de promoción de la salud y de comunicación de riesgos. Hallazgos de relevancia son el alto grado de penetración que el discurso biomédico tiene en los conocimientos y modelos explicativos de la población encuestada, así como la importancia que posee la experiencia directa de una situación amenazante en la percepción del riesgo.
- Published
- 2020
20. Determinación de las funciones características de flexión de concreto compuesto utilizando los software GeoGebra y SolidWorks en el contexto de las ciencias básicas e ingeniería
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Fernando Chávez Valdivia, Julio Acevedo Martínez, Alejandro Meza de Luna, Édgar Azael Gutiérrez Rodríguez, and José Hernández Ruiz
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El trabajo de experiencia docente se expone una metodología para el análisis de pruebas destructivas de flexión con probetas rectangulares de concreto adicionando el compuesto con fibras de pet. En la carrera de ingeniería mecánica, específicamente en las materias de estática, calculo vectorial, diseño mecánico, en el tema de análisis de materiales; en la actualidad se tienen nuevos retos en la educación, por lo que el docente debe de proponer invocaciones en su práctica aplicando metodologías de modelado matemático utilizando software libre y de licenciamiento. Estas metodologías pueden ser inéditas o propuestas por diversos autores (Carmona, 2014; 2016b), una actividad complementaria es el intercambio de ideas y proyectos con docentes de otras instituciones a nivel nacional e internacional, lo cual con lleva a una actualización en métodos procedimentales para las partes involucradas, evaluando las metodologías de modelado para su determinación y aplicación, lo que implica su validación en la práctica docente en las diversas asignaturas en donde se pretende aplicar antes de su utilización en forma masiva, posteriormente realizar un estudio de seguimiento para verificar sus resultados en forma práctica (campus viviente). Todo esto con el fin de que el alumno esté relacionado con la aplicación de las diferentes asignaturas a problemáticas reales, motivando al estudiante a seguir una ruta de aprendizaje sinérgico lo que lo llevaría a una metodología de mejora continua, rompiendo los paradigmas de que la realidad no es posible llevarla a las aulas de las instituciones. La primera actividad programada fue el presentar a los alumnos los conceptos básicos de esfuerzos de flexión en vigas simplemente apoyadas, temas a fines ya vistos en la materia en cuestión, se programaron pruebas de flexión de probetas de concreto (material compuesto) sometiéndolas a estas pruebas, tomando datos y video de las mismas, posteriormente, se utilizó el software de Geogebra, se procedió a graficar los datos, a realizar un análisis de ajuste de curva de los comportamientos de Fuerza – Deformación, esfuerzo – Deformación. A continuación, se relacionó el concepto de los esfuerzos con la función típica en su forma gráfica para establecer su deformación respecto a las cargas. Finalmente se realiza una simulación con los parámetros utilizados en las pruebas reales en solidWorks obteniendo los resultados, se analizaron los resultados de la prueba con los resultados de la simulación, comprobando que no se tienen diferencias significativas entre la simulación con las pruebas reales por lo que se puede validar las funciones características de las pruebas, para posteriores análisis.
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- 2022
21. Statin indication according to the 2019 World Health Organization cardiovascular disease risk charts and carotid ultrasound in Mexican mestizo rheumatoid arthritis patients
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Dionicio A, Galarza-Delgado, Iris J, Colunga-Pedraza, Jose R, Azpiri-Lopez, Natalia, Guajardo-Jauregui, Alejandra B, Rodriguez-Romero, Julieta, Loya-Acosta, Alejandro, Meza-Garza, Jesus A, Cardenas-de la Garza, Salvador, Lugo-Perez, and Jessica N, Castillo-Treviño
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Arthritis, Rheumatoid ,Cross-Sectional Studies ,Cardiovascular Diseases ,Humans ,Hydroxymethylglutaryl-CoA Reductase Inhibitors ,World Health Organization ,Carotid Intima-Media Thickness - Abstract
We aimed to assess the concordance of recommendation for initiating statin therapy according to the 2019 World Health Organization (WHO) cardiovascular disease (CVD) risk charts and to the presence of carotid plaque (CP) identified with carotid ultrasound in Mexican mestizo rheumatoid arthritis (RA) patients, and to determine the proportion of patients reclassified to a high cardiovascular risk after the carotid ultrasound was performed.This was a cross-sectional study nested of a RA patients' cohort. A total of 157 Mexican mestizo RA patients were included. The cardiovascular evaluation was performed using the 2019 WHO CVD risk charts (laboratory-based model) for the Central Latin America region. A carotid ultrasound was performed in all patients. The indication to start statin therapy was considered if the patient was classified as high risk, moderate risk if 40 years with total cholesterol (TC) 200 mg/dl or LDL-C 120 mg/dl, and low risk if 40 years with TC 300 mg/dl, according to the WHO CVD risk chart or if the patient had carotid plaque (CP). Cohen's kappa (k) coefficient was used to evaluate the concordance between statin therapy initiation.Initiation of statin therapy was considered in 49 (31.2%) patients according to the 2019 WHO CVD risk charts and 49 (31.2%) patients by the presence of CP. Cardiovascular risk reclassification by the presence of CP was observed in 29 (18.9%) patients. A slight agreement (k = 0.140) was observed when comparing statin therapy recommendations between 2019 WHO CVD risk charts and the presence of CP.The WHO CVD risk charts failed to identify a large proportion of patients with subclinical atherosclerosis detected by the carotid ultrasound and the concordance between both methods was poor. Therefore, carotid ultrasound should be considered in the cardiovascular evaluation of RA patients.
- Published
- 2021
22. El síndrome de burnout y sus consecuencias en la salud mental de los docentes
- Author
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Francisco Dueñas Segovia, Ligia Vanessa Sánchez Parrales, Alejandro Meza Macías, and Reynier García Rodríguez
- Subjects
Value (ethics) ,Work productivity ,Emotional health ,Nursing ,Burnout syndrome ,Energy (esotericism) ,Mental exhaustion ,Criticism ,General Medicine ,Psychology ,Mental health - Abstract
La educación es un proceso que demanda docentes preparados, capacitados, poseedores de valores, pero también con una adecuada salud mental. Estos aspectos son medulares en la formación de los niños, niñas y jóvenes. El Instituto Superior Tecnológico, propuso un proyecto de investigación cuyo tema es: Alternativas de desafíos contra el síndrome Burnout. La propuesta pretende mejorar la salud mental y emocional dirigida a los docentes de Portoviejo- Manabí, con un alcance de dos años, que culmina en el 2022. La propuesta es innovadora, pertinente, actual y contextualizada, que responde a las necesidades de la provincia y del cantón. El objetivo del estudio fue proponer un sistema de acciones encaminado a la prevención del síndrome de burnout en los docentes de unidades educativas fiscales del cantón Portoviejo. Se aplicó una metodología inherente a un estudio descriptivo, prospectivo y transversal en 200 docentes de instituciones fiscales, donde los docentes se encontraron sensiblemente afectados, los principales síntomas identificados fueron, agotamiento físico y mental, falta de motivación absoluta, sensibilidad a la crítica, pérdida de energía, descenso en la productividad laboral y estrés. En la teoría hubo divergencia de las opiniones, considerándose el síndrome de burnout como una patología mental crónica y/o aguda, la investigación permitió valorarla como aguda, en tanto se intervenga en pos de la salud mental. Se concluye que la encuesta arrojó información dirigida a una propuesta operativa de sistema de acciones encaminado a la prevención del síndrome de burnout en los docentes de unidades educativas fiscales del cantón Portoviejo.
- Published
- 2021
23. Effect of aspect ratio and dosage on the flexural response of FRC with recycled fiber
- Author
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Salman Siddique and Alejandro Meza
- Subjects
Polypropylene ,Materials science ,0211 other engineering and technologies ,020101 civil engineering ,02 engineering and technology ,Building and Construction ,Bending ,Fiber-reinforced concrete ,Aspect ratio (image) ,0201 civil engineering ,law.invention ,chemistry.chemical_compound ,Cracking ,chemistry ,Flexural strength ,High dosage ,law ,021105 building & construction ,General Materials Science ,Fiber ,Composite material ,Civil and Structural Engineering - Abstract
Recycled fibers (RF) have demonstrated a sustainable solution in the generation of fiber reinforced concrete (FRC), but their flexural performance is still under study. This paper shows the flexural behavior of 15 FRCs specimens with different aspect ratio and dosage of RF (shredded plastic PET bottles), to understand how these parameters affect their performance. In addition, 9 FRCs samples with virgin fibers (commercial Polypropylene) and 2 control samples (without fibers) were used as comparative elements. Workability, three-point bending and residual pull-out tests in combination with a count of fibers in the cracking section were developed. The results show a better flexural behavior of FRC of samples with high dosage and aspect ratio of RF, this combination generated similar or superior flexural performance with a better adherence in the concrete than those with virgin fibers. Data showed three principal problems with FRCs with RF, a reduction of the workability in comparison with concrete without fibers, a lower quantity of fiber than samples with virgin fibers, and a non-uniform tendency in their mechanical performance.
- Published
- 2019
24. Impact on Soil Bulk Density Caused by Using Buffaloes (Bubalus bubalis) in Timber Skidding
- Author
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Verónica Villalobos Barquero and Alejandro Meza Montoya
- Subjects
Costa Rica ,densidad aparente ,forest harvesting ,bulk density ,lcsh:Natural history (General) ,lcsh:QH1-278.5 ,aprovechamiento forestal ,forest plantations ,compactación del suelo ,soil compaction ,lcsh:Human ecology. Anthropogeography ,lcsh:GF1-900 ,plantaciones forestales ,Gmelina arborea ,General Agricultural and Biological Sciences - Abstract
Resumen La degradación de la estructura del suelo producto del aprovechamiento de plantaciones forestales constituye uno de los aspectos más importantes a considerar durante la producción de madera reforestada. Entre los factores que más acentúan esta degradación se encuentra el método de extracción empleado, por esta razón, se evaluó el efecto sobre el suelo provocado por el tránsito constante de los búfalos de agua (Bubalus bubalis), durante la operación de arrastre de madera. El estudio se realizó en terrenos propiedad de pequeños agricultores de la región Huetar Caribe de Costa Rica, específicamente en Sahara de Batán, Limón. Se empleó un diseño de bloques completos al azar con 2 tratamientos y 4 repeticiones por tratamiento, con el cual se evaluó el paso constante de los animales por las pistas de arrastre. Se determinó la densidad aparente del suelo en 4 pistas de extracción de madera, esto en 4 fincas. Las muestras de suelo fueron recolectadas por medio del método del cilindro. Se aplicó la prueba de normalidad, una prueba F para igualdad de varianzas basada en 2 muestras y se realizó una comparación de medias. Un total de 32 muestras de suelo fueron estudiadas, de las cuales 16 correspondieron a disturbado y las restantes 16 al testigo. La densidad aparente promedio para el suelo disturbado fue de 1.071 g/cm3 mientras que el promedio para las muestras testigo fue de 1.005 g/cm3. Finalmente, se comprobó que ambas densidades aparentes no fueron significativamente diferentes (p-value de 0.0824). Abstract The degradation of the soil structure resulting from the harvesting of forest plantations is one of the most important aspects to consider during the production of reforested wood. One of the factors that most accentuate this degradation is the method of extraction used, for this reason, the effect on the soil caused by the constant transit of water buffalo (Bubalus bubalis), during the operation of hauling logs was evaluated. The study was conducted on land owned by small farmers in the Huetar Caribe region of Costa Rica, specifically in Sahara de Batán, Limón. A randomized complete block design was used with 2 treatments and 4 repetitions per treatment, with which the animals' constant transit along the skid trails was evaluated. The soil bulk density was determined in 4 skid trails. The soil samples were collected by means of the cylinder method. The normality test was applied, an F test for equality of variances based on two samples and a comparison of means was made. A total of 32 soil samples were studied, of which 16 corresponded to disturbed soil and the remaining 16 to the control. Average bulk density for the disturbed soil 1.071 g/cm3 while the average for the control samples was 1.005 g/cm3. Finally, it was found that both apparent densities were not significantly different (p-value of 0.0824).
- Published
- 2019
25. Sistema de arrastre de madera para plantaciones forestales combinando búfalos de agua (Bubalus bubalis bubalis Simpson, 1945) con tractor agrícola
- Author
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Alejandro Meza-Montoya, Verónica Villalobos-Barquero, and Andrey Navarro-Cordero
- Subjects
Costa Rica ,arrastre en dos fases ,two-phase skidding ,draft animals ,General Medicine ,harvesting ,aprovechamiento forestal ,Gmelina arborea ,tracción animal - Abstract
Resumen El análisis del sistema de arrastre de madera en dos fases se llevó a cabo en la localidad de Ticabán, ubicada en Pococí, Limón, Costa Rica y tuvo como objetivo principal la evaluación de dos métodos de extracción: búfalos de agua y tractor agrícola. Se determinó la eficiencia de la operación a través de un estudio de tiempos y movimientos y se calculó la producción de cada una de las jornadas evaluadas, para esto se cubicaron todos los fustes arrastrados por el búfalo y por el tractor agrícola utilizando la fórmula de Smalian. Un total de 12 jornadas de arrastre de madera con búfalo y 6 con tractor agrícola fueron evaluadas. Para la primera fase del arrastre realizada con búfalos de agua se obtuvo una eficiencia promedio de 77,44 % y una producción promedio de 1,73 m3/hora programada, datos que superan a los reportados en investigaciones similares. Por otra parte, la eficiencia y la producción promedio alcanzada por el tractor agrícola durante la evaluación del arrastre de madera fue de 88,10 % y 3,16 m3/hora programada, respectivamente. Estos resultados sugieren que la técnica de extracción de madera en dos fases maximiza las ventajas de las tecnologías empleadas en cada una de ellas y minimiza sus desventajas, aumentando la eficiencia y la producción total de la operación. Abstract The analysis of a two-phase timber skidding system was carried out in Ticabán town, located in Pococí, Limón, Costa Rica and its main objective was to evaluate two extraction methods: water buffaloes and agricultural tractors. Operation efficiency was determined through a time and motion study and production for each day evaluated was calculated, for this, all log´s volume hauled by the buffaloes and by the agricultural tractor was calculated using Smalian´s formula. A total of 12 working days of timber skidding with buffaloes and 6 with farm tractor were evaluated. The first timber skidding phase carried out with water buffaloes reported an average efficiency of 77,44 % and an average production of 1,73 m3/programmed hour, values that surpass those reported in similar research. In contrast, average efficiency and production reached using the agricultural tractor during the evaluation was 88,10 % and 3,16 m3/programmed hour, respectively. These results suggest that timber extraction techniques in two phases maximizes the advantages of the technologies used in each of them (buffaloes and farm tractor) and minimizes their disadvantages, increasing efficiency and the total production of the operation.
- Published
- 2019
26. Daily, seasonal, and annual variability of temperature in streams inhabited by the endemic San Pedro Martir trout (Oncorhynchus mykiss nelsoni), in Baja California, Mexico, and the predicted temperature for the years 2025 and 2050
- Author
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Arturo Ruiz-Luna, Gorgonio Ruiz-Campos, Kathleen R. Matthews, L. W. Daesslé, Alvaro Alberto López-Lambraño, Iván Alejandro Meza-Matty, and Faustino Camarena-Rosales
- Subjects
0106 biological sciences ,Physical geography ,creek ,STREAMS ,Aquatic Science ,Oncorhynchus mykiss nelsoni ,010603 evolutionary biology ,01 natural sciences ,water temperature ,Geography. Anthropology. Recreation ,GE1-350 ,Water Science and Technology ,model ,Ecology ,biology ,010604 marine biology & hydrobiology ,biology.organism_classification ,GB3-5030 ,Environmental sciences ,Fishery ,Trout ,climate change ,Geography ,endemic ,Rainbow trout - Abstract
The present study measured the daily, seasonal, and annual variability of the water temperature of streams in which the endemic rainbow trout, Oncorhynchus mykiss nelsoni, is distributed on the western slope of the Sierra San Pedro Mártir, Baja California, Mexico, between 1996 and 2019. The seasonal thermal interval and daily duration of summer temperatures above the thermal threshold for this trout subspecies (≥ 28°C) were determined in streams at different elevations (553, 1,220, and 2,080 masl, or meters above sea level). Temperatures ≥ 28°C were recorded at the study site on the stream with the lowest elevation (San Antonio de Murillos Creek) over an accumulated 365 h between June and September 2014, with the maximum temperature recorded there, 30.66 °C, making it the site most vulnerable to climate change. At the San Antonio de Murillos Creek, the average water temperature predicted by three models (GFDL R30, HadCM3, and Mote) for the year 2025 would be a non-lethal temperature, < 28 °C, for trout at a minimum elevation of 491-511 masl, while this was predicted to be 545-701 masl for the year 2050. Predicted hourly water temperatures of 28°C (non-lethal) may occur at minimum elevations of 868-898 masl in 2025 and at 908-1028 masl in 2050, reducing a 21-23% and 23-31% its current altitudinal distribution range, respectively, thus avoiding its presence at the type locality (San Antonio de Murillos).
- Published
- 2021
27. Nail involvement in psoriatic arthritis patients is an independent risk factor for carotid plaque
- Author
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N. Guajardo-Jauregui, A. B. Rodriguez-Romero, Iris Jazmin Colunga-Pedraza, Alejandro Meza-Garza, Julieta Loya-Acosta, Jesus Alberto Cardenas-de la Garza, Dionicio Ángel Galarza-Delgado, José Ramón Azpiri-López, S. Lugo-Perez, and Andrea Cecilia Garza-Acosta
- Subjects
0301 basic medicine ,Adult ,Carotid Artery Diseases ,Male ,medicine.medical_specialty ,Immunology ,Population ,Arthritis ,Carotid Intima-Media Thickness ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,Psoriatic arthritis ,Nail Diseases ,0302 clinical medicine ,Rheumatology ,Risk Factors ,Psoriasis ,Internal medicine ,medicine ,Immunology and Allergy ,Humans ,Risk factor ,education ,Depression (differential diagnoses) ,Aged ,030203 arthritis & rheumatology ,education.field_of_study ,integumentary system ,business.industry ,Arthritis, Psoriatic ,Middle Aged ,medicine.disease ,Plaque, Atherosclerotic ,030104 developmental biology ,medicine.anatomical_structure ,Cross-Sectional Studies ,Case-Control Studies ,Nail (anatomy) ,Female ,Metabolic syndrome ,business - Abstract
Psoriatic arthritis (PsA) is a chronic, inflammatory and immune-mediated disease that affects up to 30% of psoriasis (PsO) patients.1 Nail involvement affects 80% of PsA patients and 30%–50% of PsO patients. Nail PsO has been associated with worse quality of life, higher score on the PsO Area Severity Index, early disease onset, arthritis, depression and anxiety.2 Patients with PsO and PsA have a higher risk of cardiovascular atherosclerotic morbidity and mortality than the general population. Nail PsO and cardiovascular disease have been seldom studied. Nail involvement in PsO patients has been associated to a higher prevalence of metabolic syndrome, higher risk of heart failure and higher cardiovascular risk overall.3 4 If PsA patients with nail PsO also have a higher cardiovascular risk is unknown. We aimed to determine if nail involvement in PsA patients is associated with a higher prevalence of subclinical atherosclerosis by carotid ultrasound. We performed a cross-sectional, observational and comparative study that included a total of 64 PsA patients consecutively recruited from …
- Published
- 2021
28. Mucilages from Different Plant Species Affect the Characteristics of Bio-Mortars for Restoration
- Author
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Loretta Bacchetta, Angelo Tatì, Mirta Insaurralde, Chiara Alisi, Anna Rosa Sprocati, Alejandro Meza Orozco, Franca Persia, Silvia Procacci, Emanuel Bojorquez, Maria Fernanda Falcon Martinez, S. Gagliardi, and Mauro Falconieri
- Subjects
mucilaginous plants ,Materials science ,Salvia hispanica ,0211 other engineering and technologies ,Cylindropuntia ,02 engineering and technology ,engineering.material ,Aloe vera ,food ,021105 building & construction ,Materials Chemistry ,Lime mortar ,Lime ,biology ,Surfaces and Interfaces ,021001 nanoscience & nanotechnology ,biology.organism_classification ,food.food ,Surfaces, Coatings and Films ,Fourier-transform infrared (FTIR) characterization ,Horticulture ,Plant Mucilage ,Mucilage ,lime mortar ,lcsh:TA1-2040 ,engineering ,Mortar ,lcsh:Engineering (General). Civil engineering (General) ,0210 nano-technology ,bio-products - Abstract
The need for compatible materials for the preservation of cultural heritage has resulted in the revival of lime-based mortar technology and other applications. This work investigates the cohesion and integrity of lime mortars added with fresh mucilage extracted from five plants and evaluates their bioreceptivity for long-term durability. Specimens of lime mortars added with 2.5% of fresh mucilage extracted from Aloe vera, Cylindropuntia californica, Opuntia engelmannii, Opuntia ficus-indica and Salvia hispanica mucilages were analyzed for color change (colorimetry), cohesion (ultrasound measurements), integrity (X-rays) and bioreceptivity (microbiological tests).The internal structure of the specimens added with Cacti mucilages shows better compactness, and no color change was noticed in the bio-mortars also after aging. The bioreceptivity response of mortars inoculated with bacteria, fungi and a photosynthetic biofilm was quite different. Specimens added with Aloe and Cylindropuntia mucilages showed a higher extent of bioreceptivity than the control, the specimens of bio-mortars added with Opuntia engelmannii, Opuntia ficus-indica and Salvia hispanica mucilages did not appear, up to threemonths after the contamination, any microbial growth. These results indicate that the addition of mucilage improves the mortar qualities, but the choice of the plant mucilage must be carefully evaluated since it can be responsible for changes in the bioreceptivity of the mortar.
- Published
- 2021
- Full Text
- View/download PDF
29. Prescripciones alimentarias y límites de la medicalización: polifonía y utilización de medios de comunicación en uma población urbana de México
- Author
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José Alejandro Meza-Palmeros
- Subjects
Educación para la Salud ,030505 public health ,Health (social science) ,Health Policy ,Ethnography ,Public Health, Environmental and Occupational Health ,Etnografía ,Childhood ,Medios de Comunicación Social ,03 medical and health sciences ,0302 clinical medicine ,030212 general & internal medicine ,Infancia ,Políticas de Salud ,Public aspects of medicine ,RA1-1270 ,0305 other medical science ,Health Education ,Social Media - Abstract
Resumen La línea argumental del presente trabajo sostiene que la polifonía discursiva contenida en la información relacionada con prescripciones alimentarias, que reproducen diversos sujetos discursivos, contribuye a generar resignificaciones en la población sobre las prescripciones propuestas que se traducen en prácticas alimentarias de refracción, las mismas que pudieran explicar el impacto limitado que han tenido las intervenciones educativas para la promoción de “estilos de vida saludables”. El objetivo fue estudiar el proceso de refracción de la información prescriptiva sobre alimentación e identificar las prácticas alimentarias generadas en la población det un barrio de Monterrey, México, a partir de su interacción con sujetos discursivos claves, incluidos los medios de comunicación. Se realizó una etnografía polifónica de diez meses de duración que incluyó observación participante, entrevistas etnográficas y una encuesta. Se identificaron tres tipos de discursos prescriptivos: restrictivo, selectivo y asociado a la medicamentación. Producto de la refracción de dichos discursos, la población ha generado prácticas de sustitución y de restricción de ciertos alimentos, manifestando con ello su preocupación por la salud infantil. Abstract The argumentative approach of this work sustains that the “polyphony” speech integrated in the information associated with food, contributes to generate a community resignification regarding the proposed prescriptions by several discursive subjects, which are interpreted into “refractive feeding practices.” These could explain the limited impact that educational interventions have had to the “healthy lifestyles” promotion. The purpose was to study the refractive process related to a prescriptive information about nutrition and identifying the feeding practices generated precisely on a Monterrey, Nuevo León settlement, from their interaction with a discursive framework on key subjects, including the media. A polyphonic ethnography was conducted in ten months, and it included participant observation, ethnographical interviews and a survey. Three prescriptive discourses were identified: restrictive, selective and one associated with “medicamentation.” As a result of refraction of the mentioned discourses, the population generated substitution practices and a restriction on certain food products, expressing their concern for children’s health.
- Published
- 2021
30. Mechanical Optimization of Concrete with Recycled PET Fibres Based on a Statistical-Experimental Study
- Author
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Rubén D. López-Carreño, Laura Montserrat Meza, Francesc Pardo-Bosch, Pablo Pujadas, Alejandro Meza, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció, and Universitat Politècnica de Catalunya. EC - Enginyeria de la Construcció
- Subjects
Optimization ,Toughness ,Materials science ,Aspect ratio ,Reinforced concrete construction ,0211 other engineering and technologies ,02 engineering and technology ,lcsh:Technology ,Ecologia marina ,Recycled fibres ,Article ,chemistry.chemical_compound ,recycled fibres ,Flexural strength ,statistical analysis ,fibre reinforced concrete ,021105 building & construction ,Ultimate tensile strength ,Polyethylene terephthalate ,General Materials Science ,PET bottles ,Composite material ,Reinforcement ,Ductility ,lcsh:Microscopy ,lcsh:QC120-168.85 ,Construcció en formigó armat amb fibres ,lcsh:QH201-278.5 ,lcsh:T ,Statistical relation ,021001 nanoscience & nanotechnology ,chemistry ,lcsh:TA1-2040 ,Statistical analysis ,lcsh:Descriptive and experimental mechanics ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,Edificació::Materials de construcció [Àrees temàtiques de la UPC] ,0210 nano-technology ,lcsh:Engineering (General). Civil engineering (General) ,lcsh:TK1-9971 ,Fibre reinforced concrete ,optimization - Abstract
Discarded polyethylene terephthalate (PET) bottles have damaged our ecosystem. Problems of marine fauna conservation and land fertility have been related to the disposal of these materials. Recycled fibre is an opportunity to reduce the levels of waste in the world and increase the mechanical performance of the concrete. PET as concrete reinforcement has demonstrated ductility and post-cracking strength. However, its performance could be optimized. This study considers a statistical-experimental analysis to evaluate recycled PET fibre reinforced concrete with various fibre dose and aspect ratio. 120 samples were experimented under workability, compressive, flexural, and splitting tensile tests. The results pointed out that the fibre dose has more influence on the responses than its fibre aspect ratio, with statistical relation on the tensional toughness, equivalent flexural strength ratio, volumetric weight, and the number of fibres. Moreover, the fibre aspect ratio has a statistical impact on the tensional toughness. In general, the data indicates that the optimal recycled PET fibre reinforced concrete generates a superior performance than control samples, with an improvement similar to those reinforced with virgin fibres.
- Published
- 2020
31. La institucionalización de los adultos dependientes. Características de la atención pública a nivel nacional y en Nuevo León
- Author
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José Alejandro Meza Palmeros and Mónica Minerva Martínez Segura
- Subjects
Marketing ,Pharmacology ,Institucionalización ,cifras estadísticas ,Organizational Behavior and Human Resource Management ,México ,Strategy and Management ,Drug Discovery ,Pharmaceutical Science ,adultos mayores ,Nuevo León - Abstract
El objetivo del presente trabajo es caracterizar la situación social de los adultos dependientes institucionalizados en México y Nuevo León, para lo cual se revisaron diversas fuentes oficiales de información: cifras correspondientes al Censo Nacional de Población y Vivienda; Dirección General de Información en Salud; Directorio Estadístico Nacional de Unidades Económicas y del Presupuesto de Egresos de la Federación de los años 2012 al 2017 y el gasto público en salud a través de la plataforma del Subsistema de Cuentas en Salud. Así mismo, se integró información solicitada vía Instituto Federal de Acceso a la Información a través de la plataforma de transparencia. A partir del análisis de la información recabada se señala un importante descuido de la atención a la dependencia tanto en México como en Nuevo León, dentro de un marco de reducción presupuestal que afecta particularmente a los adultos mayores cuya institucionalización y acogida ha sido derivada fundamentalmente al ámbito privado y a la caridad.
- Published
- 2018
32. Estudio de colocación para una ferretería en Hermosillo, Sonora
- Author
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Ciro Moisés Romo Puebla, Arturo Alejandro Meza Sánchez Laurel, and Víctor Manuel Delgado Moreno
- Subjects
Sampling system ,Ideal (set theory) ,Computer science ,Sample size determination ,Margin of error ,Reliability (statistics) ,Reliability engineering - Abstract
Esta investigación tiene un enfoque de investigación descriptivo, explicativo y cuantitativo donde se aprovecharon las diversas fuentes de información existentes (principalmente del INEGI). El objetivo de la investigación fue localizar la o las zonas ideales para iniciar una nueva propuesta de negocios en el ramo ferretero. Se diseñó un sistema de muestreo para recopilar el tamaño de muestra calculado manteniendo una confiabilidad del 95% un margen de error no mayor al 5%. Se analizó la información obtenida que a la par de la información secundaria facilito la información para determinar las zonas adecuadas para la apertura de una o varias Ferreterías “de Barrio”.
- Published
- 2017
33. Mucilages from Different Plant Species Affect the Characteristics of Bio-Mortars for Restoration
- Author
-
Alisi, Chiara, primary, Bacchetta, Loretta, additional, Bojorquez, Emanuel, additional, Falconieri, Mauro, additional, Gagliardi, Serena, additional, Insaurralde, Mirta, additional, Martinez, Maria Fernanda Falcon, additional, Orozco, Alejandro Meza, additional, Persia, Franca, additional, Sprocati, Anna Rosa, additional, Procacci, Silvia, additional, and Tatì, Angelo, additional
- Published
- 2021
- Full Text
- View/download PDF
34. APSP's Lunar New Year Festival celebrates diversity and community
- Author
-
Aguilar, Alejandro Meza
- Subjects
Festivals -- Rites, ceremonies and celebrations ,Sandwiches -- Rites, ceremonies and celebrations ,Organizations ,Pork ,News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar Leo Yue/HIGHLANDER On Tuesday, Jan. 28, Asian Pacific Student Programs held a Lunar New Year Festival to celebrate the Chinese New Year, which was on Jan. [...]
- Published
- 2020
35. Under the Kilt: Going back home for the holidays
- Author
-
Aguilar, Alejandro Meza
- Subjects
News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar Courtesy of Pexels When I went back home in the winter break of 2018 after my first year as a transfer student at UCR, I felt [...]
- Published
- 2020
36. Anisotropy and bond behaviour of recycled Polyethylene terephthalate (PET) fibre as concrete reinforcement
- Author
-
Faiz Uddin Ahmed Shaikh and Alejandro Meza de Luna
- Subjects
Materials science ,Tension (physics) ,0211 other engineering and technologies ,020101 civil engineering ,02 engineering and technology ,Building and Construction ,Bending ,0201 civil engineering ,chemistry.chemical_compound ,Flexural strength ,chemistry ,021105 building & construction ,Ultimate tensile strength ,Polyethylene terephthalate ,General Materials Science ,Composite material ,Reinforcement ,Anisotropy ,Civil and Structural Engineering ,Tensile testing - Abstract
This paper studied the anisotropy of the recycled Polyethylene terephthalate (PET) and as reinforcing fibres for concrete considering three experimental campaign e.g. uni-axial tension, pullout, and three point-bending. The study also relates parameters such as fibre position and embedded length. In total, 18 recycled PET samples with dog-bone shape are prepared for the uni-axial tension test, 54 samples (embedded recycled PET fibre in concrete) for the pullout test, and 12 recycled PET fibre reinforced concrete samples for the 3-point bending tests. The data were analysed using ANOVA and Tukey methods to get statistical confidence. Tensile results demonstrated anisotropy in recycled PET, but its effect was low in the recycled PET fibre-concrete interface behaviour. Also, the results show a weaker pullout capacity of the PET fibre-concrete interface than the PET tensile strength. The addition of recycled PET fibre showed about 6% increase in flexural strength of concrete.
- Published
- 2020
37. Actualización en displasia del desarrollo de la cadera
- Author
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Alejandro Meza Martínez, Ariadna Flores Castro, and Marco Brenes Méndez
- Subjects
Gynecology ,Hip dysplasia ,medicine.medical_specialty ,Femoral head ,medicine.anatomical_structure ,Proximal femur ,business.industry ,Recien nacido ,medicine ,Female sex ,Femur ,medicine.disease ,business - Abstract
espanolLa displasia del desarrollo de cadera es el trastorno ortopedico mas comun en los recien nacidos; hace referencia a un amplio espectro de alteraciones patologicas del acetabulo y femur proximal en crecimiento que incluye la luxacion, subluxacion y displasia como tal. Es mas frecuente en el sexo femenino y la cadera izquierda suele ser la mas afectada. Se asocia a factores de riesgo bien descritos; estos pueden ser geneticos, ambientales e incluso la posicion prenatal. El diagnostico precoz es vital y se basa en una combinacion de examen fisico, ultrasonido y radiografia. El tratamiento va a depender de la edad del paciente, puede ser ortopedico o quirurgico y los objetivos de ambas modalidades estan basados en la obtencion de una cabeza femoral colocada concentricamente en el acetabulo para que este ultimo tenga un crecimiento de manera adecuada. EnglishDevelopmental hip dysplasia is the most common orthopedic disorder in newborns; refers to a wide spectrum of pathological alterations of the growing acetabulum and proximal femur that includes dislocation, subluxation, and dysplasia as such. It is more frequent in the female sex and the left hip is usually the most affected. It is associated with well-described risk factors, these can be genetic, environmental and even the prenatal position. Early diagnosis is vital and is based on a combination of physical examination, ultrasound, and radiography. The treatment will depend on the age of the patient, it may be orthopedic or surgical and the objectives of both modalities are based on obtaining a femoral head placed concentrically in the acetabulum so that the latter has an adequate growth.
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- 2020
38. Contraceptive Counseling and Family Planning Services in the Chiapas Highlands: Challenges and Opportunities for Improving Access for the Indigenous Population
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David Mariano Meléndez-Navarro, Alejandro Meza-Palmeros, and Sergio Meneses-Navarro
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education.field_of_study ,medicine.medical_specialty ,Human rights ,business.industry ,Public health ,media_common.quotation_subject ,Population ,Participant observation ,Public relations ,Structural violence ,Indigenous ,Family planning ,medicine ,Sociology ,business ,education ,Reproductive health ,media_common - Abstract
This chapter analyzes the perceptions and practices of contraceptive counseling among health service providers to the indigenous population of the Chiapas Highlands, Mexico. The objective is to describe and analyze how contraceptive counseling aimed at the indigenous population is provided, and the perceptions about delivery among health workers involved, highlighting the cultural relevance and acceptability of their services, and whether it fits within a human rights framework. The methodology is based on qualitative techniques including in-depth interviews with key informants, together with participant observation performed by indigenous simulated users. The first section describes the background and conceptual reference that guide the analysis, including the legal framework for family planning counseling and the landscape of contraceptive use among indigenous populations in the state of Chiapas and Mexico. Our findings show a key paradox in the representations and practices of health providers: while they consider that the contraceptive services are antagonistic to the indigenous cultures and values, and recognize the lack of availability of resources, contraceptive counseling competencies, and barriers to the access to services, at the same time the providers emphasized the need to persuade the population to use contraceptive services, an idea that seems inextricably linked to contraception being viewed as an important medium to reach public health goals and not as a value in itself. The chapter concludes by identifying windows of opportunity to implement intercultural adaptations and specific recommendations to improve access to and coverage of contraceptive and family planning services among the indigenous population of the Chiapas Highlands.
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- 2018
39. Estimación de la producción de madera obtenida durante la operación de arrastre utilizando búfalos de agua (Bubalus bubalis), en plantaciones de Gmelina arborea roxb, Limón, Costa Rica
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Verónica Villalobos-Barquero and Alejandro Meza-Montoya
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Aprovechamiento forestal ,modelos de regresión ,Gmelina arborea ,General Medicine - Abstract
Se evaluó la operación de arrastre en cinco fincas ubicadas en Sahara de Bataán (entre las coordenadas 83°20'32"O, 10°05'09"N), Limón, Costa Rica. Mediante un estudio de tiempos (T) y movimientos (M)) se recolectaron datos de dos condiciones de aprovechamiento: raleo y tala rasa, dos métodos de arrastre con búfalos: sulky y cadenas, así como de los distintos búfalos utilizados: búfalo 1 y búfalo 2. Se verificó por medio de pruebas de normalidad, análisis de varianzas, prueba de Tukey (distribución de datos normales) y Bonferroni (distribución de datos que no mostraron un comportamiento normal) las siguientes hipótesis: Ho: No existe diferencia estadística entre: a) tratamiento silvicultural aplicado, b) método de arrastre utilizado y c) búfalo utilizado para el arrastre y la Ha: existe diferencia estadística entre los grupos de datos antes mencionados.Las variables evaluadas fueron distancia de arrastre en metros (D), número de fustes arrastrados (N), duración total de la jornada en horas (T), volumen en metros cúbicos (V), eficiencia en porcentaje (E) y producción en metros cúbicos por hora, el análisis se realizó para cada uno de los ciclos de producción y para cada una de las jornadas evaluadas.Con el propósito de predecir la producción del arrastre de madera en troza con búfalos de agua, se construyeron modelos de regresión según la metodología propuesta por Hughell (1990). Las ecuaciones de mejor ajuste fueron escogidas según variables como el coeficiente de variación y el coeficiente de determinación R2 ajustado y fueron validadas con un 25% de los datos previamente aislados y escogidos al azar.Se obtuvieron dos modelos para estimar la producción de madera en troza de melina arrastrada por el búfalo en dos condiciones de aprovechamiento: raleo (a) y tala rasa (b), los cuales se muestran a continuación:a) Producción (m3/h) = 1,633 + 0,154*V – 0,002*D – 0,109*T, con un R2 de 93,2%. b) Producción (m3/h) = 5,042 + 0,199*V - 0,001*D - 0,275*T - 0,041*E, con un R2 de 86,7%.
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- 2017
40. Exigibilidad del derecho a la protección de la salud en los servicios de obstetricia en México
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Alejandro Meza, Sandra Mancinas, Sergio Meneses, and David Meléndez
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lcsh:Arctic medicine. Tropical medicine ,lcsh:RC955-962 ,México ,lcsh:Public aspects of medicine ,lcsh:R ,lcsh:Medicine ,salud de la mujer ,servicios de salud materna ,lcsh:RA1-1270 ,derechos humanos - Abstract
La incorporación del marco de los derechos humanos a la salud materna se menciona cada vez con mayor frecuencia como una propuesta factible para mejorar la atención que reciben las mujeres en los servicios de atención obstétrica. Si bien es cierto que en México se cuenta con un sólido marco normativo en la materia, un elemento fundamental para garantizar el cumplimiento los derechos humanos relacionados con la salud son los mecanismos de exigibilidad que, además de encontrarse disponibles, deben ser efectivos y próximos a la población, principalmente en la atención obstétrica, espacio en donde ocurren reiteradas violaciones a los derechos humanos que ponen en riesgo la salud y la vida de las mujeres. El objetivo de este artículo es precisar los elementos normativos, jurídicos y extrajurídicos que deben ser considerados para incorporar la salud materna como un conjunto de derechos humanos exigibles.
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- 2015
41. Vegan Jamaica meat
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Aguilar, Alejandro Meza
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Bottled drinking water ,Allergens ,Allergy ,Vegetables ,News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar When it comes to meat alternatives, there are a variety of options. Although some can be inaccessible because of their cost, allergens or even the difficulty [...]
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- 2019
42. Under the Kilt: Navigating college as an undocumented, first-generation student
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Aguilar, Alejandro Meza
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Illegal immigrant children ,News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar Joshua Wang /HIGHLANDER Being a first-generation student is difficult and it's even more difficult with the added layer of being undocumented. An undocumented individual is not [...]
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- 2019
43. Queer Alliance hosts Coming Out Dance
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Aguilar, Alejandro Meza
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Gay students ,Dance ,News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar Julianna Gularte/HIGHLANDER On Thursday, Oct. 17, at 7 p.m., Queer Alliance hosted the annual Coming Out Dance at the UCR Alumni Center. The event is annually [...]
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- 2019
44. Chick-Fil-Ain't it!: The Usage and Support of Discriminatory Companies on Campus
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Aguilar, Alejandro Meza
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Fast food restaurants ,Organizations ,Family ,Catering ,News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar Here at UCR, diversity and inclusion are promoted; while we usually do well in demonstrating those values, there are occasions when we miss the mark. ASPB [...]
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- 2019
45. YouTuber and cover artist, JamieBoy, performs at UCR
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Aguilar, Alejandro Meza
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Artists ,Organizations ,News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar Alejandro Meza-Aguilar/HIGHLANDER On Wednesday, Oct. 9, Asian Pacific Student Programs held a welcome event to introduce students to the organizations on campus that started at 6 [...]
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- 2019
46. Recipe: Vegan Chilaquiles
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Aguilar, Alejandro Meza
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Nutrition ,Purines ,Caffeine ,Soups ,News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar Alejandro Meza-Aguilar/HIGHLANDER School is starting and as time passes, we have to keep conscious of time and nutrition. You can only run on packets of ramen, [...]
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- 2019
47. Plant Power Fast Food cooks up vegan takes on your fast food favorites
- Author
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Aguilar, Alejandro Meza
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Convenience foods ,Restaurant chains ,Food ,Beverages ,Restaurant industry ,News, opinion and commentary ,Sports and fitness - Abstract
Byline: Alejandro Meza Aguilar Alejandro Meza-Aguilar/HIGHLANDER Burgers Sides Drinks Atmosphere Overall 9/10 9/10 9/10 8/10 9/10 Vegan food -- those two words conjure up an image of salads in the [...]
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- 2019
48. Reproducibility of Fluorescent Expression from Engineered Biological Constructs in E. coli
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Jacob, Beal, Trac Haddock Angellii, Markus, Gershater, Kim de Mora, Meagan, Lizarazo, Jim, Hollenhorst, Randy, Rettberg, Philipp, Demling, Rene, Hanke, Michae, Osthegel, Anna, Schechtel, Suresh, Sudarsan, Arne, Zimmermann, Bartosz, Gabryelczyk, Martina, Ikonen, Minnamari, Salmela, Muradıye, Acar, Muhammed Fatih Aktas, Furkan, Bestepe, Furkan Sacit Ceylan, Sadık, Cigdem, Mikail, Dohan, Mustafa, Elitok, Mehmet, Gunduz, Esra, Gunduz, Omer Faruk Hatipoglu, Turan, Kaya, Orhan, Sayin, Safa, Tapan, Osman Faruk Tereci, Abdullah, Uçar, Mustafa, Yilmaz, Jeffrey, Barrick, Alex, Gutierrez, Dennis, Mishler, Jordan, Monk, Kate, Mortensen, Nathan, Shin, Ella, Watkins, Yintong, Chen, Yuji, Jin, Yuanjie, Shi, Haoqian Myelin Zhang, Bruno, Ono, Ieda Maria Martinez Paino, Lais, Ribovski, Ivan, Silva, Danilo Keiji Zampronio, Nils, Birkholz, Rudiger Frederik Busche, Oliver, Konzock, Steffen, Lippold, Carsten, Ludwig, Melanie, Philippi, Lukas, Platz, Christian, Sigismund, Susanne, Weber, Maren, Wehrs, Niels, Werchau, Anna, Wronska, Zen Zen Yen, Yash, Agarwal, Evan, Appleton, Douglas, Densmore, Ariela, Esmurria, Kathleen, Lewis, Alan, Pacheco, Marcel, Bruchez, Danielle, Peters, Cheryl, Telmer, Lena, Wang, Silvia Canas Duarte, Daniel Giraldo Perez, Camilo Gomez Garzon, Jorge Madrid Wolff, Nathaly Marin Medina, Valentina, Mazzanti, Laura Rodriguez Forero, Eitan, Scher, Robin, Dowell, Samantha, O’Hara, Cloe Simone Pogoda, Kendra, Shattuck, Ali, Altintas, Anne Pihl Bali, Rasmus, Bech, Anne, Egholm, Anne Sofie Laerke Hansen, Kristian, Jensen, Kristian Barreth Karlsen, Caroline, Mosbech, Sophia, Belkhelfa, Noemie, Berenger, Romain, Bodinier, Cecile, Jacry, Laura Matabishi Bibi, Pierre, Parutto, Julie, Zaworski, Andries de Vries, Freek de Wijs, Rick, Elbert, Lisa, Hielkema, Chandhuru, Jagadeesan, Bayu, Jayawardhana, Oscar, Kuipers, Anna, Lauxen, Thomas, Meijer, Sandra, Mous, Renske van Raaphorst, Aakanksha, Saraf, Otto, Schepers, Oscar, Smits, Jan Willem Veening, Ruud Detert Oude Weme, Lianne, Wieske, Catherine, Ainsworth, Xenia Spencer Milnes, Alejandro, Gómezávila, Eddie Cano Gamez, Ana Laura Torres Huerta, Carlos Alejandro Meza Ramirez, Philipp, Popp, Jara, Radeck, Anna, Sommer, Xiangkai, Li, Qi, Wu, Hongxia, Zhao, Ruixue, Zhao, Irem, Bastuzel, Yasemin, Ceyhan, Mayda, Gursel, Burak, Kizil, Ilkem, Kumru, Yasemin, Kuvvet, Helin, Tercan, Seniz, Yuksel, Luiza, Niyazmetova, Timothy, Ang, Lucas, Black, Ciaran, Kelly, George, Wadhams, Clovis, Basier, Urszula, Czerwinska, Cindy Suci Ananda, Muhammad Al Azhar, Adelia, Elviantari, Maya, Fitriana, Arief Budi Witarto, Yuliant, Jia Fangxing, Qingfeng, Hou, Wan, Pei, Chen, Rifei, Wang, Rong, Huang, Wei, Zhang, Yushan, Jianguo, He, Dengwen, Lai, Pai, Li, Jianheng, Liu, Chunyang, Ni, Qianbin, Zhang, Cinthya, Cadenas, Zardain Canabal, Eduardo J., Claudia Nallely Alonso Cantu, Mercedes Alejandra Vazquez Cantu, Eduardo Cepeda Canedo, Cesar Miguel Valdez Cordova, Jose Alberto de la Paz Espinosa, Carlos Enrique Alavez Garcia, Ana Laura Navarro Heredia, Adriana, Hernandez, Sebastian Valdivieso Jauregui, Eduardo Ramirez Montiel, Eduardo Serna Morales, Yamile Minerva Castellanos Morales, Omar Alonso Cantu Pena, Ramirez Rodríguez, Eduardo A., Elizabeth Vallejo Trejo, Jesus Gilberto Rodriguez Ceja, Jesus Eduardo Martinez Hernandez, Mario Alberto Pena Hernandez, Enrique Amaya Perez, Rebeca Paola Torres Ramirez, Cla, J., Martin, Hanzel, Sarah Mohand Said, Shihab, Sawar, Dylan, Siriwardena, Alex, Tzahristos, Nils, Anlind, Martin, Friberg, Erik, Gullberg, Stephanie, Herman, Dallin, Christensen, Sara, Gertsch, Cody, Maxfield, Charles, Miller, Ryan, Putman, Christine, Bauerl, Estelles Lopez, Lucia T., Estefania Huet Trujillo, Marta Vazquez Vilar, Marlène Sophie Birk, Nico, Claassens, Walter de Koster, Rik van Rosmalen, Wen Ying Wu, Sian, Davies, Dan, Goss, William, Rostain, Chelsey, Tye, Waqar, Yousaf, Natalie, Farny, Chloe, Lajeunesse, Alex, Turland, Chen, An, Jielin, Chen, Yahong, Chen, Zehua, Che, Baishan, Fang, Xiaotong, Fu, Xifeng, Guo, Yue, Jiang, Yiying, Lei, Jianqiao, Li, Zhe, Li, Chang, Liu, Weibing, Liu, Yang, Li, Yizhu, Lv, Qingyu, Ruan, Yue, Su, Chun, Tang, Yushen, Wang, Fan, Wu, Xiaoshan, Yan, Ruihua, Zhang, Tangduo, Zhang, Farren, Isaacs, Ariel Leyva Hernandez, Natalie, Ma, Stephanie, Mao, Yamini, Naidu, Tuukka, Miinalainen, Marion Aruann, Daniel Calendini, Yoann Chabert, Gael Chambonnier, Myriam, Choukour, Ella de Gaulejac, Camille, Houy, Axel, Levier, Loreen, Logger, Sebastien, Nin, Valerie, Prima, Sturgis, James N., Beibei, Fang, Sadik, Cigdem, Abdullah, Ucar, Alejandro, Gutierrez, Revanth, Poondla, Sanjana, Reddy, Tyler, Rocha, Natalie, Schulte, Devin, Wehle, Marta Eva Jackowski, Sean Ross Craig, Ariana Mirzarafie Ahi, Elliott, Parris, Luba, Prout, Barbara, Steijl, Rachel, Wellman, Zhao, Fan, Zhang, Jing, Yang, Wei, Yang, Yuanzhan, Wen, Zhaosen, Evan, Appletion, Jeffrey, Chen, Abha, Patil, Shaheer, Priracha, Kate, Ryan, Nick, Salvador, John, Viola, Boralli, Camila Maria S., Camila Barbosa Bramorski, Juliana Cancino Bernardi, Ana Laura de Lima, Paula Maria Pincela Lins, Cristiane Casonato Melo, Deborah Cezar Mendonca, Thiago, Mosqueiro, Everton, Silva, Graziele, Vasconcelos, Ruchi, Asthana, Donna, Lee, Michelle, Yu, Peter, Choi, Effie, Lau, Kenneth, Lau, Oscar, Ying, Brandon, Malone, Paul, Young, Aidan, Ceney, Dakota, Hawthorne, Sharon, Lian, Sam, Mellentine, Dylan, Miller, Barbara Castro Moreira, Christie, Peebles, Olivia, Smith, Kevin, Walsh, Allison, Zimont, Michael, Brasino, Michael, Donovan, Hannah, Young, Jan, Bejvl, Daniel, Georgiev, Hynek, Kasl, Katerina Pechotova, Vaclav Pelisek, Anna, Sosnova, Pavel, Zach, Anthony, Ciesla, Benjamin, Hoover, Elliott, Chapman, Jon Marles Wright, Vicky, Moynihan, Liusaidh, Owen, Brooke Rothschild Mancinelli, Emilie, Cuillery, Joseph, Heng, Vincent, Jacquot, Paola, Malsot, Rocco, Meli, Cyril, Pulver, Ari, Sarfatis, Loic, Steiner, Victor, Steininger, Nina van Tiel, Gregoire, Thouvenin, Axel, Uran, Lisa, Baumgartner, Anna, Fomitcheva, Daniel, Gerngross, Verena, Jagger, Michael, Meier, Anja, Michel, Jasmine, Bird, Bradley, Brown, Todd, Burlington, Daniel, Herring, Joseph, Slack, Georgina, Westwood, Emilia, Wojcik, Julian, Bender, Julia, Donauer, Ramona, Emig, Rabea, Jesser, Julika, Neumann, Lara, Stuhn, Takema, Hasegawa, Tomoya, Kozakai, Haruka, Maruyama, Sean, Colloms, Charlotte, Flynn, Vilija, Lomeikaite, James, Provan, Kang, Ning, Shuyan, Tang, Guozhao, Wu, Yunjun, Yang, Zhi, Zeng, Zhan, Yi, Pan, Chu, Jun, Li, Keji, Yan, Athale, Chaitanya A., Swapnil, Bodkhe, Manasi, Gangan, Harsh, Gakhare, Yash, Jawale, Snehal, Kadam, Prachiti, Moghe, Gayatri, Mundhe, Neha, Khetan, Ira, Phadke, Prashant, Uniyal, Siddhesh, Zadey, Ines, Cottignie, Eline, Deprez, Astrid, Deryckere, Jasper, Janssens, Frederik, Jonnaert, Katarzyna, Malczewska, Thomas, Pak, Johan, Robben, Ovia Margaret Thirukkumaran, Vincent Van Deuren, Laurens, Vandebroek, Laura Van Hese, Laetitia Van Wonterghem, Leen, Verschooten, Moritz, Wolter, Joss, Auty, Richard, Badge, Liam, Crawford, Raymond, Dalgleish, Amy, Evans, Cameron, Grundy, Charlie, Kruczko, Payal, Karia, Graeme, Glaister, Rhys, Hakstol, Seme, Mate, Karin, Otero, Dustin, Smith, Jeff, Tingley, Hans Joachim Wieden, Haotian, Wang, Ningning, Yao, Matthias, Franz, Anna, Knoerlein, Nicolas, Koutsoubelis, Loechner, Anne C., Max, Mundt, Alexandra, Richter, Oliver, Schauer, Marjorie, Buss, Sivateja, Tangirala, Brian, Teague, Tianyi, Huang, Xinhao, Song, Yibing, Wei, Zhaoran, Zhang, Longzhi, Cao, Cheng Li, Kang Yang, Zhiqin, Chen, Yuxing, Fang, Libo, Sun, Weiyi, Wang, Yang, Yang, David, Adams, Joshua, Colls, Joshua, Timmons, David, Urick, Julia Anna Adrian, Madina, Akan, Youssef, Chahibi, Rahmi, Lale, Typhaine Le Doujet, Marit Vaagen Roee, Altynay, Abdirakhmanova, Askarbek, Orakov, Azhar, Zhailauova, Jinyang, Liang, Yu, Ma, Qikai, Qin, Yetian, Su, Ju Yeon Han, Raphaella, Hull, Wei Chung Kong, Li Chieh Lu, Duke, Quinton, Pauline, Aubert, Johan, Bourdarias, Olivier, Bugaud, Coralie Demon Chaine, Isabelle, Hatin, Ibtissam Kaid Slimane, Seong Koo Kang, Audrey, Moatti, Cheikh Fall Ndiaye, Mathilde, Ananos, Alexander, Arkhipenko, Valentin, Bailly, Jules, Caput, Javier, Castillo, Alma Chapet Batlle, Floriane, Cherrier, Claudia Demarta Gatsi, Deshmukh, Gopaul, Muriel, Gugger, Caroline, Lambert, Lucas, Krauss, Amelie, Vandendaele, Xiaojing, Li, Lin, Xiaomei, Luo Xunxun, Anders C. h. r. Hansen, Tina, Kronborg, Pettersen, Jens S., Charles, Calvet, Tyler Dae Devlin, Kosuke, Fujishima, Danny, Greenberg, Tina, Ju, Ryan, Kent, Daniel, Kunin, Erica, Lieberman, Griffin, Mccutcheon, Thai, Nguyen, Lynn, Rothschild, Shih, Joseph D., Jack, Takahashi, Kirsten, Thompson, Forrest, Tran, Daniel, Xiang, Felix, Richter, Yang, Xiaoran, Xiangyue, Hu, Changyuan, Deng, Shuyu, Hua, Yumeng, Li, Xinyu, Meng, Boxiang, Wang, Yingqi, Wang, Xuan, Wang, Zixuan, Xu, Jieyu, Yan, Ming, Yan, Yineng, Zhou, Edgar Alberto Alcalá Orozco, José Alberto Cristerna Bermúdez, Daniela Flores Gómez, José Ernesto Hernández Castañeda, Diana Clarisse Montaño Navarro, Juana Yessica PérezÁvila, María Fernanda Salazar Figueroa, María Fernanda Sánchez Arroyo, Oliva Angélica Sánchez Montesinos, Ángel Farid Rojas Cruz, Carlos Ramos Gutiérrez, Alonso Pérez Lona, Carlos Alejandro Meza Ramírez, Fernanda Sotomayor Olivares, Jorge Sebastián Rodríguez Iniesta, Juan Carlos Rueda Silva, Shotaro, Ayukawa, Takahiro, Kashiwagi, Daisuke, Kiga, Misa, Minegishi, Riku, Shinohara, Hiraku, Tokuma, Yuta, Yamazaki, Shuhei, Yasunishi, Erinn Sim Zixuan, Remsha, Afzal, Matthew, Carrigan, Barry, Moran, Marlena, Mucha, Arnas, Petrauskas, Stefan, Marsden, Michelle, Post, Anne, Rodenburg, Hector, Sanguesa, Marit van der Does, Erwin van Rijn, Max van’t Hof, Yeshi de Bruin, Hans de Ferrante, Elles, Elschot, Laura, Jacobs, Jan Willem Muller, Sjoerd, Nooijens, Femke, Vaassen, Cas van der Putten, Esther van Leeuwen, Laura van Smeden, Kwan Kwan Zhu, Kevin, Sabath, Katharina, Sporbeck, Nicolai von Kügelgen, Lisa, Wellinger, Stefanie, Braun, Jack, Ho, Yash, Mishra, Mariola, Sebastian, Lucas von Chamier, Ahsan, Fasih M., Satyadi, Megan A., Vivienne, Gunadhi, Phillip, Kyriakakis, Jenny, Lee, Walter, Thavarajah, Kimia, Abtahi, Robert, Hand, Chun Mun Loke, Adam, Wahab, Iowis, Zhu, Del Bianco, Cristina, Chizzolini, Fabio, Elisa, Godino, Lentini, Roberta, Mansy, Sheref Samir, Yeh Martin, Noel, Claudio Oss Pegorar, Alexander, Cook, Timothy, Kerns, Chad, Nielsen, Michael, Paskett, Alexander, Torgesen, Stephen, Lee, Ophir, Ospovat, Sikandar, Raza, Daniel, Shaykevich, Jarrod, Shilts, Barbora, Bajorinaite, Mykolas, Bendorius, Ieva, Rauluseviciute, Ieva, Savickyte, Sarunas, Tumas, William, Buchser, Elli, Cryan, Caroline, Golino, Andrew, Halleran, Taylor, Jacobs, Michael, Lefew, Joe, Maniaci, John, Marken, Margaret, Saha, Panya, Vij, Kayla, Desanty, Julie, Mazza, Raytheon BBN Technologies, iGEM Foundation, Synthace, Agilent Technology [Santa Clara], Raytheon BBN Technologies, Synthace, and Agilent provided support in the form of salaries for authors JB, MG, and JH, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of these authors are articulated in the author contributions section, The authors wish to thank Sarah Munro and Marc Salit of NIST for help in designing this study. Consortium authors include all persons self-identified by contributing teams as deserving co-authorship credit. Contributors are listed alphabetically within team, and teams alphabetically and by year. Note that some persons may be credited as contributing in both years. Team names are given as identified in iGEM records: full details of each team’s institution and additional members may be found online in the iGEM Foundation archives at:http://year.igem.org/Team:name e.g.: full information on the 2015 ETH_Zurich team may be found at: http://2015.igem.org/Team:ETH_Zurich, BBN Technologies, IGEM Foundation, Synthace Ltd., Agilent Technologies, Department of Biotechnology and Chemical Technology, Helsinki Institute for Information Technology HIIT, ATOMS Turkiye, Boston University, Carnegie Mellon University, Technical University of Denmark, Ludwig Maximilian University of Munich, Middle East Technical University, Sumbawa University of Technology, Southern University of Science and Technology, Sun Yat-Sen University, Tecnológico de Monterrey, Universidad Autonoma de Nuevo Leon, University of Ottawa, Universitat Politècnica de València, Wageningen University and Research Centre, Worcester Polytechnic Institute, Xiamen University, University of Texas at Austin, Bielefeld University, Birkbeck University of London, USP-Brazil, City University of Hong Kong, Colorado State University, CU Boulder, Swiss Federal Institute of Technology Lausanne, Swiss Federal Institute of Technology Zurich, University of Exeter, Indian Institute of Science Education and Research, KU Leuven, Massachusetts Institute of Technology, Northeast Agricultural University, Nanjing Agricultural University, Norwegian University of Science and Technology, Ocean University of China, University of Southern Denmark, Shenzhen Middle School - SZMS 15, Tokyo Institute of Technology, Trinity College Dublin, Delft University of Technology, Eindhoven University of Technology, Tuebingen, University of California Los Angeles, University of California San Diego, University of Maryland, University of Trento, Vanderbilt University, College of William and Mary, Department of Bioproducts and Biosystems, Aalto-yliopisto, Aalto University, Jones, D Dafydd, Discrete Technology and Production Automation, and Robotics and image-guided minimally-invasive surgery (ROBOTICS)
- Subjects
0106 biological sciences ,0301 basic medicine ,green fluorescent protein ,Laboratory Proficiency Testing ,Transcription, Genetic ,International Genetically Engineered Machine ,[SDV]Life Sciences [q-bio] ,lcsh:Medicine ,Protein Engineering ,01 natural sciences ,Infographics ,Synthetic biology ,genetics ,lcsh:Science ,Promoter Regions, Genetic ,Macromolecular Engineering ,transcription initiation ,Measurement ,Multidisciplinary ,Chemistry ,Strain (biology) ,gene expression regulation ,good laboratory practice ,Research Assessment ,Fluorescence ,Reproducibility ,3. Good health ,Bioassays and Physiological Analysis ,Engineering and Technology ,Educational Status ,Synthetic Biology ,Genetic Engineering ,Transcription ,Graphs ,Research Article ,Biotechnology ,Transcriptional Activation ,Computer and Information Sciences ,General Science & Technology ,Green Fluorescent Proteins ,Bioengineering ,Computational biology ,iGEM Interlab Study Contributors ,Research and Analysis Methods ,Promoter Regions ,03 medical and health sciences ,promoter region ,Genetic ,010608 biotechnology ,Escherichia coli ,ta215 ,business.industry ,Data Visualization ,lcsh:R ,Fluorescence Competition ,genetic transcription ,DNA structure ,Reproducibility of Results ,Biology and Life Sciences ,protein engineering ,030104 developmental biology ,Good Health and Well Being ,7 INGENIERÍA Y TECNOLOGÍA ,Synthetic Bioengineering ,People and Places ,lcsh:Q ,Population Groupings ,biosynthesis ,business ,metabolism ,Undergraduates - Abstract
We present results of the first large-scale interlaboratory study carried out in synthetic biology, as part of the 2014 and 2015 International Genetically Engineered Machine (iGEM) competitions. Participants at 88 institutions around the world measured fluorescence from three engineered constitutive constructs in E. coli. Few participants were able to measure absolute fluorescence, so data was analyzed in terms of ratios. Precision was strongly related to fluorescent strength, ranging from 1.54-fold standard deviation for the ratio between strong promoters to 5.75-fold for the ratio between the strongest and weakest promoter, and while host strain did not affect expression ratios, choice of instrument did. This result shows that high quantitative precision and reproducibility of results is possible, while at the same time indicating areas needing improved laboratory practices. Copyright: © 2016 Beal et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
- Published
- 2016
49. Valoraciones morales y trayectoria social del adulto dependiente. Una aproximación a partir de relatos de vida de adultos institucionalizados en Nuevo León, México
- Author
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Palmeros, José Alejandro Meza, Segura, Mónica Minerva Martínez, and Navarro, Sergio Meneses
- Subjects
Institucionalización ,Moral career ,Carreira moral ,Institutionalization ,Life stories ,Adultos dependientes ,Dependant adults ,Metodologia qualitativa ,Metodología cualitativa ,Relatos de vida ,qualitative methodology ,Adultos dependentes ,Institucionalização ,Histórias de vida ,Carrera moral - Abstract
The aim of this job is to reconstruct the moral career, that is, the sequence of events that constitute the social trajectory expecienced by a group of subjects belonging to a common social category as dependant adults. For the reconstruction of this career, we used a qualitative approach based on life stories, obtained through interviews with relatives and caregivers of institutionalized adults with severe cognitive impairment. El objetivo de este trabajo es reconstruir la carrera moral, es decir, la sucesión de eventos constitutivos de la trayectoria social experimentada por un conjunto de sujetos que pertenecen a una misma categoría social de adultos dependientes. Utilizamos para la reconstrucción de esta carrera, una aproximación cualitativa a partir de relatos de vida obtenidos por medio de entrevistas a familiares y cuidadores de adultos institucionalizados con deterioro cognitivo severo. O objetivo deste trabalho é reconstruir a carreira moral, ou seja, a sucessão de eventos que constituem a trajetória social vivida por um grupo de sujeitos pertencentes à mesma categoria social de adultos dependentes. Utilizamos para a reconstrução desta carreira, uma abordagem qualitativa baseada em histórias de vida obtidas através de entrevistas com parentes e cuidadores de adultos institucionalizados com comprometimento cognitivo grave.
- Published
- 2017
50. Valoraciones Morales Y Trayectoria Social Del Adulto Dependiente. Una Aproximación A Partir De Relatos De Vida De Adultos Institucionalizados En Nuevo León, México
- Author
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José Alejandro Meza Palmeros, Mónica Minerva Martínez Segura, and Sergio Meneses Navarro
- Subjects
Adultos dependientes ,Institucionalización ,Metodología cualitativa ,Relatos de vida ,Carrera moral - Abstract
El objetivo de este trabajo es reconstruir la carrera moral, es decir, la sucesión de eventos constitutivos de la trayectoria social experimentada por un conjunto de sujetos que pertenecen a una misma categoría social de adultos dependientes. Utilizamos para la reconstrucción de esta carrera, una aproximación cualitativa a partir de relatos de vida obtenidos por medio de entrevistas a familiares y cuidadores de adultos institucionalizados con deterioro cognitivo severo.
- Published
- 2017
- Full Text
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