Modelos Hargreaves Priestley-Taylor y redes neuronales artificiales en la estimación de la evapotranspiración de referencia

Reference evapotranspiration estimation by Hargreaves Priestley-Taylor and artificial neural networks models

ROCIO CERVANTES OSORNIO RAMON ARTEAGA RAMIREZ MARIO ALBERTO VAZQUEZ PEÑA WALDO OJEDA BUSTAMANTE ABEL QUEVEDO NOLASCO (2012, [Artículo])

Resulta costoso medir directamente la evapotranspiración de referencia (ET0) con un lisímetro, y al no contar con esta información se utilizó el método de Penman-Monteith modificado por la FAO (ET0 FAO-56 P-M) para su cálculo. El objetivo del presente trabajo fue realizar una comparación de modelos empíricos como el de Hargreaves, Hargreaves calibrado y Priestley-Taylor, con el modelo de redes neuronales artificiales función de base radial (RNA BR), con las mismas variables de entrada, en la estimación de la ET0 FAO-56 P-M. Las estimaciones de ET0 se evaluaron en cuatro estaciones climáticas del Distrito 075, Valle del Fuerte en Sinaloa, México.

Cultivos alimenticios Planificación del riego Evapotranspiración Modelos matemáticos INGENIERÍA Y TECNOLOGÍA

Influencia de las variables atmosféricas en la producción y calidad de jitomate indeterminado (CID FI) en invernadero

CANDIDO MENDOZA PEREZ CARLOS RAMIREZ AYALA ANTONIO MARTINEZ RUIZ JUAN ENRIQUE RUBIÑOS PANTA WALDO OJEDA BUSTAMANTE Jorge Flores Velazquez (2018, [Ítem publicado en memoria de congreso])

El 70% de los cultivos que se producen en México bajo condiciones protegidas corresponde al jitomate. Bajo este esquema surge la importancia de cultivar de forma correcta la agricultura intensiva, sin embargo, es necesario conocer los factores ambientales que condicionan sobre el máximo potencial de producción. El objetivo de este trabajo fue medir y analizar las variables atmosféricas y su influencia sobre el desarrollo, producción y calidad de jitomate cultivado en invernadero en función de numero de tallos. El experimento se realizó en invernadero, en el periodo de abril a septiembre de 2015.

Cultivos alimenticios Invernaderos Efectos del clima INGENIERÍA Y TECNOLOGÍA

Internal erosion under spillway rested on an embakment dam

JOSE RAUL FLORES BERRONES (2015, [Artículo])

This paper presents the investigation about the mechanism of internal erosion caused in the right abutment of the Shahghasem dam’s spillway. Shahghasem dam is an earthen dam located in Yasouj, in southwest of Iran. A significant hole and pipe have been observed in the corner of the right abutment from upstream view. The foundation is Marlstone, which has low cohesion and susceptible for internal erosion and piping in some conditions. Going through details of the design maps has shown that Lane’s criteria for selecting safe dimensions of the seepage control measures have not been considered properly. A series of the supportive walls are designed to attach to the right part of the spillway in order to increase the length of seepage. The pipe route of the erosion should also be grouted with high quality concrete.

Erosión del suelo Aliviaderos Presas Filtración INGENIERÍA Y TECNOLOGÍA

Efecto de la velocidad de flujo y de la calidad del agua en la pasivación de un reactor de electrocoagulación

Effect of flow velocity and water quality in the passivation of an electrocoagulation reactor

SARA PEREZ CASTREJON Silvia Gelover Santiago Alejandra Martín-Domínguez (2012, [Artículo])

En los últimos años se ha incrementado el interés por las técnicas electroquímicas para el tratamiento de distintos tipos de agua contaminada y, debido a esto, el desarrollo y la evaluación del desempeño de los reactores ha jugado un papel muy importante en el éxito de estas tecnologías. En ese sentido, el presente estudio muestra el efecto de la velocidad de flujo (vf) y la calidad fisicoquímica del agua a tratar, sobre la pasivación de un reactor de electrocoagulación. Las pruebas se hicieron a escala piloto en un reactor a flujo pistón, con electrodos de aluminio monopolares operando en forma galvanostática y con cambios de polaridad temporizada.

Electrocoagulación Calidad del agua Pasivación INGENIERÍA Y TECNOLOGÍA

Discurso y esfera pública : mujer y prensa en Hermosillo, Sonora : el caso de los periódicos El Pueblo y El Tiempo (1934-1938).

ELIZABETH CEJUDO RAMOS (2007, [Tesis de maestría])

CIENCIAS SOCIALES Periodismo Análisis del discurso Medios impresos Mujeres en los medios

The impact of digital transformation and value capture on business models

RAUL FRANCISCO MONTALVO CORZO (2023, [Artículo])

In awareness of the importance that Digital Transformation (DT) has gained in Mexican companies in recent years, as well as the concern of Business Models (BM) in capturing value, the purpose of this thesis is to answer the question:

What is the impact of Digital Transformation and value capture on business models?

Five research projects have been developed in Mexico to answer this question. The first research work consisted of a systematic literature review in order to identify relevant opportunities for this research, which is explained in the first chapter of the thesis. Derived from this first research work, the following four research papers were developed.

The second chapter addresses the adoption of the digital transformation of corner stores promoted by large companies. Through the application of in-depth interviews in corner stores resulted in an urgent call for large companies to unify strategies to promote the DT of the front desk with customers.

The third chapter includes an analysis of the sustainability reports of large companies, in which DT actions to achieve sustainability are identified. Concluding that investment in digital transformation actions promote the sustainability of businesses and the permanence of business models.

A successful business model considers satisfactory customer experience as a pillar in its development. Which motivated the fourth paper, focused on investigating how artificial intelligence is perceived in customer service. It was through surveys that we investigated whether the implementation of chatbots improves the customer experience, findings show that it will depend on the purpose of the chatbot, the age of the customer and the level of education.

With the purpose of sharing experiences of Mexican companies in the implementation of DT projects, a fifth research paper is included explaining why digital transformation projects fail in companies. This work was carried out by conducting interviews with Project Managers (PM) and experts in DT projects implementation.

This work is original since it is developed in Mexico, has different research methodologies and has managerial implications that are mentioned in each research paper. There are undoubtedly great opportunities in the research of DT, since it is a topic with many edges, and this thesis only covers some of them.

Doctor of Business Administration

CIENCIAS SOCIALES CIENCIAS ECONÓMICAS ECONOMÍA DEL CAMBIO TECNOLÓGICO INNOVACIÓN TECNOLÓGICA

Estimación de los flujos de materia y energía en la Reserva de Bahía de los Ángeles, Canales de Ballenas y de Salsipuedes, mediante un modelo de balance de masas

Estimation of the flows of matter and energy in Bahía de los Ángeles, Canales de Ballenas y de Salsipuedes Reserve, using a mass balance model

Ana Lilia Perea Rojas (2023, [Tesis de maestría])

La Reserva de la Biósfera de Bahía de Los Ángeles, Canales de Ballenas y de Salsipuedes (RB-BLACS) es un área natural protegida que provee de distintos servicios ambientales a los pobladores de la comunidad de Bahía de Los Ángeles. Tiene una gran importancia ecológica por la diversidad de especies que habitan en ella y para las especies migratorias que la utilizan, algunas de las cuales se encuentran enlistadas dentro de la NOM-059-SEMARNAT-2001. Con objeto de estimar el efecto de la pesca sobre el ecosistema se construyó un modelo de balance de masas empleando Ecopath con Ecosim. Mediante una revisión documental, se definieron 32 grupos funcionales (GF) y se construyó una matriz de dietas. El modelo se parametrizó con los valores de biomasa (B), relación producción/biomasa (P/B) y se obtuvieron los valores de eficiencia ecotrófica (EE) y relación producción/consumo (P/Q). El rendimiento total del sistema (TST) fue de 13,689 t/km2/año. El nivel trófico de la captura de 3.48 y la producción neta del sistema de 4,641 t/km2/año. La matriz de impactos tróficos mixtos muestra que los grupos que sufren mayor impacto negativo por los Tiburones son los Odontocetos, Misticetos y Tortugas. Se simularon los cambios en la biomasa relativa de los GF bajo escenarios de incremento y decremento del esfuerzo pesquero (5 y 10%) y no pesca, en un lapso de 10 años. Se encontró que los cambios en el esfuerzo pesquero de Elasmobranquios y los Peces de escama son los que mayor efecto tienen sobre otros GF. Resalta que suspender la pesca tendría poco efecto, tanto positivo como negativo (2-3%) sobre la biomasa relativa de los GF, excepto Tiburones y rayas, que incrementarían 245 y 124%, respectivamente. Este modelo podría utilizarse para la toma de decisiones en el manejo y conservación del ecosistema.

The Biosphere Reserve of Bahía de Los Ángeles, Canales de Ballenas y de Salsipuedes (RB-BLACS) is a natural protected area that provides different environmental services to the residents of the community of Bahía de Los Ángeles. It has great ecological importance due to the diversity of species that inhabit it and the migratory species that use it, some of which are listed within NOM-059- SEMARNAT-2001. To estimate the effect of fishing on the ecosystem, a mass balance model was built using Ecopath with Ecosim. Through a documentary review, 32 functional groups (GF) were defined, and a diet matrix was constructed. The model was parameterized with the values of biomass (B), production/biomass ratio (P/B) and the values of ecotrophic efficiency (EE) and production/consumption ratio (P/Q) were obtained. The total system throughput (TST) was 13,689 t/km2/year. The trophic level of the capture is 3.48 and the net production of the system is 4,641 t/km2/year. The matrix of mixed trophic impacts shows that the groups that suffer the greatest negative impact from Sharks are Odontocetes, Mysticetes and Turtles. Changes in the relative biomass of GF were simulated under scenarios of increase and decrease in fishing effort (5 and 10%) and no fishing, over a period of 10 years. It was found that changes in the fishing effort of Elasmobranchs and Finfish have the greatest effect on other GFs. It highlights that suspending fishing would have little effect, both positive and negative (2-3%) on the relative biomass of GFs, except for sharks and rays, which would increase 245 and 124%, respectively. This model could be used for decision making in the management and conservation of the ecosystem.

Ecopath con Ecosim, socio-ecosistema, Golfo de California, pesquerías, conservación Ecopath with Ecosim, socio-ecosystem, Gulf of California, fisheries, conservation BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA OTRAS ESPECIALIDADES DE LA BIOLOGÍA OTRAS OTRAS

Copper oxide nanoparticles biosynthetized Copper oxide nanoparticles biosynthetized biosynthetizedimprove germination improve germination improve germination and bioactive compounds in wheat sprouts

Hortensia Ortega OrtÍz JAZMIN MONTSERRAT GAUCIN DELGADO Pablo Preciado Rangel Manuel Fortis Hernández Luis Guillermo Hernández Montiel Efraín de la Cruz Lázaro Liliana Lara Capistrán (2022, [Artículo])

"Metal nanoparticles have many positive effects in improving crop production and productivity and allow for increased germination and rapid crop establishment under field conditions. The metallic nanoparticles applied in this study were copper oxide nanoparticles (CuONPs) biosynthesized using orange peel (Citrus X sinensis) as a reducing agent to avoid or reduce toxicity in wheat seeds and sprouts. This study determined the effect of CuONPs on germination, radicle and plumule length, as well as the production of phytochemical compounds in wheat sprouts. The seeds were treated with suspensions of CuONPs at the following concentrations: 0, 0.5, 1, 2, 4 and 6 mg mL-1. The results indicate that the use of low doses of CuONPs (0.5 mg mL-1), improved germination, vigor, plumule and radicle length, in addition to increasing the biosynthesis of phytochemical compounds in wheat shoots. A high concentration of CuONPs (6 mg mL-1) causes inhibitory effects due to Cu accumulation and phytotoxicity in plant tissue. The use of CuONPs for green synthesis is a viable alternative to obtain beneficial effects in germination and seedling development, as well as greater secondary metabolite production."

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS AGROQUÍMICA REGULADORES DEL CRECIMIENTO DE LAS PLANTAS REGULADORES DEL CRECIMIENTO DE LAS PLANTAS

Plant Growth-Promoting Rhizobacteria Improve Growth and Fruit Quality of Cucumber under Greenhouse Conditions

GERARDO ZAPATA SIFUENTES Luis Guillermo Hernández Montiel Jorge Sáenz Mata Manuel Fortis Hernández EDUARDO BLANCO CONTRERAS ROBERTO GREGORIO CHIQUITO CONTRERAS Pablo Preciado Rangel (2022, [Artículo])

"Cucumber fruit is rich in fiber, carbohydrates, protein, magnesium, iron, vitamin B, vitamin C, flavonoids, phenolic compounds, and antioxidants. Agrochemical-based production of cucumber has tripled yields; however, excessive synthetic fertilization has caused problems in the accumulation of salts in the soil and has increased production costs. The objective of this study was to evaluate the effect of three strains of plant growth-promoting rhizobacteria (PGPR) on cucumber fruit growth and quality under greenhouse conditions. The rhizobacteria Pseudomonas paralactis (KBendo6p7), Sinorhizobium meliloti (KBecto9p6), and Acinetobacter radioresistens (KBendo3p1) was adjusted to 1 × 108 CFU mL−1 . The results indicated that the inoculation with PGPR improved plant height, stem diameter, root length, secondary roots, biomass, fruit size, fruit diameter, and yield, as well as nutraceutical quality and antioxidant capacity, significantly increasing the response of plants inoculated with A. radioresistens and S. meliloti in comparison to the control. In sum, our findings showed the potential functions of the use of beneficial bacteria such as PGPR for crop production to reduce costs, decrease pollution, and achieve world food safety and security."

rhizobacteria, PGPR, nutraceutical quality CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS AGROQUÍMICA REGULADORES DEL CRECIMIENTO DE LAS PLANTAS REGULADORES DEL CRECIMIENTO DE LAS PLANTAS

Effect of Pectimorf on the rooting ability, and morpho-physiological physiological trials of national cocoa (Theobroma cacaoL.) under different substrates

JUAN JOSE REYES PEREZ Luis Tarquino Llerena Ramos Víctor Hugo Reynel Chila Juan Antonio Torres Rodríguez FAROUK SAAD Luis Guillermo Hernández Montiel Wilmer Tezara (2022, [Artículo])

"Cocoa is an economical cash crop that is formerly planted worldwide. Cuttings are a method of vegetative propagation suitable for maintaining desirable characteristics in cocoa trees. A greenhouse experiment was performed to evaluate the optimal concentrations of Pectimorf® (0, 10, 50, and 100 mg L-1) for rooting ability and seedling establishment as well as some physiological trials of 4 months EETP-800 national cocoa cuttings grown under two different substrates (S1: 80% soil + 20% sand and S2: 70% soil + 20% sand + 10% rice husk). The data showed that in most cases there are no significant differences in vegetative growth and root characteristics as well as gas exchange parameters between the two substrates. On the other hand, the application of Pectimorf® concentration enhanced all tested traits compared to untreated plants. The most effective in this regard was 100 mg L-1, that giving the highest value of all trials. As for the interaction effect, the result also shows that the application of Pectimorf® concentration in special at 100 mg L-1 among two substrates had an additive effect on plant growth, gas exchange, and survival percentage compared to non-treated cuttings. The application of 100 mg L-1 Pectimorf® with S2 substrate produced stronger seedlings with a higher survival percentage. This protocol can be used commercially for cocoa propagation commercially."

bioregulator, cuttings, root length, photosynthesis CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS AGROQUÍMICA REGULADORES DEL CRECIMIENTO DE LAS PLANTAS REGULADORES DEL CRECIMIENTO DE LAS PLANTAS