Análisis de velocidad de soldadura robotizada para proceso MIG en acero1045 AISI

Carlos Eduardo Hernández Acero (2022, [Tesis de maestría])

Esta investigación denominada “análisis de velocidad de soldadura robotizada para proceso MIG en acero 1045 AISI” busca el desarrollo de un modelo matemático que permita, mediante parámetros conocidos, el cálculo de la penetración de soldadura en piezas unidas con proceso Metal Inert Gas (MIG). El objetivo se centra en buscar la combinación de valores paramétricos para la velocidad de soldadura, el voltaje y la corriente, los que se obtienen mediante la aplicación de un diseño experimental, que, ejecutadas en el proceso, pueda lograr una penetración de soldadura aceptable para la unión de la pieza. El modelo de superficie de respuesta aplicado fue un diseño de experimentos 2k con diseño central compuesto, y posteriormente el modelo se utilizó para estimar la velocidad de soldadura. Este diseño de experimentos se ejecutó por medio del programa estadístico Minitab versión 17. (Hernández Acero et al., 2022). Una vez teniendo la penetración de soldadura deseada en la pieza, se puede calcular la velocidad de soldadura necesaria para el cálculo de tiempo ciclo y utilizar los parámetros definidos de corriente y voltaje. Los valores de estos factores serán útiles para comenzar la programación del robot ya con la celda funcional y reducir el tiempo de arranque en automático (Hernández Acero et al., 2022).

This research, named “robotic welding speed analysis for MIG process in 1045 AISI steel”, seeks to develop a mathematical model that allow, through know parameters, the calculation of welding penetration in parts joined with Metal Inert Gas (MIG) process. The objective is focused on finding the combination of parametric values for robot welding speed, voltage and current, which are obtained through the application of a design of experiments, which, executed in the process, can achieve an acceptable welding penetration for the union of the part. The response surface model applied was a 2k design of experiments with central composite design, and subsequently the model was used to estimate the welding speed. This design of experiments was obtained using the statistical software Minitab version 17. (Hernández Acero et al., 2022). Once having the desired welding penetration in the part, it can calculate the welding speed necessary for the cycle time calculation and use the defined parameters of current and voltage to start programming the robot with the functional cell and reduce the time of startup (Hernández Acero et al., 2022).

Soldadura MIG Penetración Tiempo ciclo Velocidad de soldadura MIG welding Penetration Cycle time Welding speed INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS OTRAS ESPECIALIDADES TECNOLÓGICAS OTRAS OTRAS

The past, the present, the future, and occupational self-efficacy: an attributions and cultural differences perspective

Daniel Arturo Cernas Ortiz (2023, [Artículo, Artículo])

This study´s objective was to examine empirical relationships between three dimensions of time perspective (future, present fatalistic, and past negative) and occupational self-efficacy. By surveying Mexican (n = 286) and U.S. (n = 272) respondents, we also tested the moderating role of culture. Regression analyses revealed that time perspective dimensions have significant associations with occupational self-efficacy, being future time perspective more potent than its past negative and present fatalistic counterparts. Moderation analyses indicated that none of the examined time perspective-self-efficacy relationships varied significantly between the U.S. and Mexico. Overall, this study suggests that relationships between time perspective and occupational self-efficacy vary according to different temporal dimensions, that future TP is key to develop occupational self-efficacy, and that cultural values may not exert a significant influence on the time perspective-occupational self-efficacy connection.

Perspectiva de tiempo autoeficacia diferencias culturales análisis de moderación CIENCIAS SOCIALES CIENCIAS SOCIALES Time perspective self-efficacy cultural differences moderation analysis

Metodología Value Stream Mapping (VSM) aplicada a procesos de perforación de pozos petroleros en México

Value Stream Mapping (VSM) methodology applied to oil well drilling processes in Mexico

NEMIAS VASQUES MORALES CARLOS BELISARIO CASTAÑEDA CASTAÑEDA (2023, [Artículo])

Con los cambios recientes en el sector energético a nivel mundial, la industria petrolera enfrenta retos importantes en la extracción de hidrocarburos, por lo que se ha priorizado la implementación de operaciones que permitan esta actividad de forma eficiente y optimizada. En este trabajo se analizará la aplicación de una de las herramientas del Lean Manufacturing, el VSM (Value Stream Mapping) con la finalidad de identificar posibles mejoras y disminución de tiempos no productivos en los procesos de perforación de pozos petroleros, de acuerdo a las experiencias previas en campos desarrollados en México. Se pretende demostrar que herramientas de análisis de eficiencia para la manufactura pueden adaptarse a industrias pesadas como la petrolera y en particular del área de perforación.

With recent changes in the energy sector worldwide, the oil industry faces significant challenges in the extraction of hydrocarbons, which is why the implementation of operations that allow this activity in an efficient and optimized manner has been prioritized. In this work, the application of one of the Lean Manufacturing tools, VSM (Value Stream Mapping) will be analyzed with the purpose of identifying possible improvements and reduction of non-productive times in the oil well drilling processes, according to experiences. previous ones in developed fields in Mexico. The aim is to demonstrate that efficiency analysis tools for manufacturing can be adapted to heavy industries such as the oil industry and in particular the drilling area.

Lean Operaciones Tiempos no productivos Operations Non-productive times INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS OTRAS ESPECIALIDADES TECNOLÓGICAS OTRAS OTRAS

Espirales del instante: los haikus de Hondonada de Jorge Tenorio

ABRAHAM PERALTA VELEZ (2019, [Artículo])

Artículo número 3 de la Sección Tema. 12 páginas. tyvlliii

El haiku, desde José Juan Tablada, se ha transculturalizado a las formas de la lírica hispánica, de tal manera que se puede apreciar, por ejemplo, el uso de rimas, de tropos clásicos de la retórica o una enunciación del yo lírico en devaneos elegiacos, celebratorios, filosóficos, etc. Sin embargo, el poeta mexicano, Jorge Tenorio, ha buscado acercarse al haiku, no desde la propia retórica hispánica a la que pertenece, evitando rimas, metáforas u otros tropos afines a la tradición iniciada por José Juan Tablada, sino a través de la idea del vacío del budismo zen, que tiene como consecuencia en la conformación del poemario Hondonada (2008) la expresión del tiempo discontinuo del instante, explicado por Gaston Bachelard, la expresión de la insubstancialidad del yo lírico, el origen dependiente de los fenómenos y el mostrar transparente, contemplativo, lo que está sucediendo en ese instante, a través del viaje en la intemperie, a la manera de Matsuo Bashō, como otra forma de asir ser, opuesto al tiempo de la acumulación y la conquista de la morada.

Haiku, from José Juan Tablada, has been transculturalized to the forms of Hispanic lyric, so that one can appreciate, for example, the use of rhymes, of classical rhetoric tropes or an enunciation of the lyrical self in elegiac rallies, celebratory, philosophical, etc. However, the Mexican poet, Jorge Tenorio, has sought to approach haiku, not from the Hispanic rhetoric to which it belongs, avoiding rhymes, metaphors or other tropes related to the tradition initiated by José Juan Tablada, but through the idea from the void of Zen Buddhism, which results in the conformation of the poem book Hondonada (2008), the expression of the discontinuous time of the instant, explained by Gaston Bachelard, the expression of the insubstantiality of the lyrical self, the dependent origin of phenomena and the display transparent, contemplative, what is happening at that moment, through the trip in the open, in the manner of Matsuo Basho, as another way of asserting itself, as opposed to the time of accumulation and conquest of the abode.

Espiral, vacío, intemperie, yo lírico, tiempo, discontinuidad, instante. Spiral, emptiness, weather, lyrical self, time, discontinuity, instant. HUMANIDADES Y CIENCIAS DE LA CONDUCTA CIENCIAS DE LAS ARTES Y LAS LETRAS TEORÍA, ANÁLISIS Y CRÍTICA LITERARIAS

Shopping centers at zmcm. The companies, location and production of a neoliberal urban space

Dante-Guillermo Celis-Galindo (2021, [Artículo, Artículo])

This work aims to analyze different aspects of shopping center at the Metropolitan Zone of Mexico City as location, opening year and developer company. Also it will identify diverse characteristics, economic and political phases in the country as well as the role of the development companies and shopping centers as a producers of a neoliberal urban space. This paper presents the way shopping centers importance has growth and how it had become in a neoliberal city characteristic; with this the characteristics of these urban works are visualized and related with their construction companies and local governments which has caused the transformation of the city. After conducting a census, with more than two hundred shopping centers, the study was delimited to those with the greatest significance by size, location and developer. At the beginning of the paper, the characteristics that shopping malls should have for the realization of this work are mentioned. In a first section an approach is made to the theoretical elements of the city and the shopping center and therefore identifying the developers that most  nfluence this process; the second section addresses the characteristics of places by location and the characteristics that urban planners have depending on the area where they are; the third section discusses the years of opening, the squares and relates to government administrations and the economic characteristics of the country; and finally, a tour of the urban regulations in Mexico City and its latest modifications is made.

shopping center neoliberalism space urban space construction company centro comercial neoliberalismo espacio espacio urbano empresa constructora HUMANIDADES Y CIENCIAS DE LA CONDUCTA HUMANIDADES Y CIENCIAS DE LA CONDUCTA

Política de lo materno de dirigentes barriales en el espacio público

David Luján Veron ANÍBAL PÉREZ CONTRERAS (2023, [Artículo])

"En este artículo se analiza un conjunto de relatos de dirigentes vecinales, recabados a partir de dos investigaciones doctorales concluidas, con el objetivo de desvelar los distintos modos en que las mujeres invocan roles tradicionalmente asociados a lo femenino —protección, cuidado, maternidad— para legitimarse en el espacio público y participar en la política local. Se argumentará que las mujeres observadas participan en la configuración de una “política de lo materno” que, pese a reforzar estereotipos tradicionales sobre el rol de las mujeres, constituye un reservorio de experiencias, aprendizajes y prácticas que pueden ser leídas en clave de politización y construcción de ciudadanía".

Espacio público. Ciudadanía. Maternidad en política. Clientelismo. Organizaciones barriales. CIENCIAS SOCIALES SOCIOLOGÍA SOCIOLOGÍA DE LOS ASENTAMIENTOS HUMANOS ESTUDIOS DE COMUNIDAD ESTUDIOS DE COMUNIDAD

Socio-spatial segregation of socio-environmental assets of public green spaces in the city of Durango, Mexico

Carlos Alejandro Custodio González Tania Ortiz Patricia Catalina Medina Pérez (2024, [Artículo, Artículo])

The current development model's accumulation logic has resulted in the emergence and consolidation of social processes like segregation, leading to differentiated access and availability of urban goods and services among social groups based on socioeconomic, ethnic, or societal standing. The current development model's accumulation logic has resulted in the emergence and consolidation of social processes like segregation, leading to differentiated access and availability of urban goods and services among social groups based on socioeconomic, ethnic, or societal standing. This disparity impacts employment levels, educational performance, urban decay, and environmental degradation. In this context, the article aims to examine the socio-spatial segregation in the access to socio-environmental amenities provided by public green spaces (EVP) in a medium-sized city, specifically Durango, Mexico. The analysis utilizes spatial analysis and statistical methods that involve five variables associated with EVPs: surface area, percentage, number, density, and the socioeconomic level of the population. A spatial pattern of segregation was identified through these variables, resulting in four clusters that impact how the city of Durango is inhabited, produced, reproduced, lived, and constructed.

sociospatial exclusion public space spatial autocorrelation spatial patterns spatial justice exclusión socioespacial espacio público autocorrelación espacial patrones espaciales justicia espacial CIENCIAS SOCIALES CIENCIAS SOCIALES

The listening in the contemporary city. Theoretical approaches

Gustavo Alfonso Galván Cázares José Guadalupe Rivera González (2021, [Artículo, Artículo])

The present article sets out different theoretical approaches around the sound and the act of listening in the contemporary city as well as the processes of production and significance of the city through the mentioned act. The central goal of this writing is to contribute to the interdisciplinary discussions about the coupling of sound/ listening in the field of urban studies since the aforementioned dissertations are still scarce in the Latin American context. To this effect, firstly, listening as an epistemic means by which the city is learned is discussed. Afterwards, some implications about different global processes in the urbanites’ aural practices are analyzed. Lastly, the necessity of appealing to citizen’s listening as an essential element to consider throughout the planning, construction, remodeling and the plans of territorial restructuring as well as in every physical and symbolic transformation of the city is presented. In this context some theoretical premises about the experimentation of the public space through hearing, being aware of the sound as a component that allows an appropriation and significance of the space as well as an element of social cohesion and generator of identities are analyzed.

listening sound city public space escucha sonido ciudad espacio público HUMANIDADES Y CIENCIAS DE LA CONDUCTA HUMANIDADES Y CIENCIAS DE LA CONDUCTA

The pedestrian trajectories derived from the barriers of the public space

Amanda Casillas Ana Victoria Casillas Zapata (2023, [Artículo, Artículo])

Walking behavior respond to various factors, both internal and external, the first one is linked to the pedestrian's motivation, and the second one is linked to the opportunity offered by the built environment. The public space in the cities represents the main articulator of pedestrian movements, allowing flexible or fixed types of trips to be carried out. Therefore, those urban spaces that are detached from the network conformed by the pedestrian infrastructure could limit accessibility and alter the paths of travel. This study addresses the cases of three neighborhood parks that in recent years have had their configuration transformed by closing their perimeters in a partial or total way; the main objective of this study is to identify the types of pedestrian trajectories that derive from these barriers, as for those who move from within the neighborhoods and those who move from outside. These trajectories were analyzed under a qualitative approach and a descriptive scope. This allow us to determine that the parks, according to their disposition, have the potential to attract or repel the pedestrian movement, whether they were used as a destination or a connection place for displacement. In this way, it was possible to determine that the pedestrian trajectories are conditioned by the reduced permeability of these spaces.

Pedestrian mobility Public space Parks Barriers movilidad peatonal espacio público parques barreras conectividad HUMANIDADES Y CIENCIAS DE LA CONDUCTA HUMANIDADES Y CIENCIAS DE LA CONDUCTA

Gráfica de protesta: PuntosB, Lapiztola y La Guillotina. Un análisis entre el cuerpo y el espacio en la imagen de protesta

Jorge Gabriel Ortiz Leroux (2023, [Capítulo de libro])

Capítulo número 5 de la Sección Imágenes y representaciones.

El objetivo del presente texto es el de mostrar como la obra emanada de colectivos de análisis del espacio social de la protesta, permite reconocer las claves que relacionan al espacio con los actores que lo ocupan. Asimismo, se pretende abordar cómo el conflicto que se interpone entre los actores de la protesta define sus magnitudes y reelabora sus disposiciones y sus formas de entrecruzamiento en relación con la presencia de la imagen. Asimismo, la representación imaginaria y visual del espacio permite ver a la ciudad como un laboratorio, que puede también ser registrado, interpretado y resituado respecto a los discursos hegemónicos. Los proyectos visuales que aquí abordamos representan un trabajo que a través de los años ha expresado su visión sobre las realidades sociales y políticas de nuestro país, en las que el conflicto aparece como telón de fondo de la creación e interpretación visual de esas realidades. La interacción entre política y estética tiene como escenario el espacio público y la ciudad, que fungen como trasfondo para la expresión de formas imaginarias y que conforman en sí mismas el sentido de los reclamos y las transformaciones gestadas. Mirando a la ciudad, observamos sus cambios y las formas de relación, cada vez más complejas, que se viven en ella.

Public spaces--Social aspects--Mexico. Dissident art. Protest movements--Mexico--Posters. Graphic arts--Political aspects--Mexico. Political posters, Mexican--20th century. Espacios públicos -- México. Arte disidente. Movimientos de protesta. Carteles políticos mexicanos. HT185 HUMANIDADES Y CIENCIAS DE LA CONDUCTA CIENCIAS DE LAS ARTES Y LAS LETRAS TEORÍA, ANÁLISIS Y CRÍTICA DE LAS BELLAS ARTES