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A Hierarchical Axiomatic Evaluation of Additive Manufacturing Equipment and the 3D Printing Process Based on Sustainability and Human Factors
No full textAs interest in additive manufacturing (AM) continues to increase, it has become more important to have a robust method to help potential users select the AM process that best suits their technological needs while providing the greatest potential benefits in terms of sustainability and its effect on people. This paper presents the development of a framework for selecting the best AM process for a given application by considering both sustainability and human factors through the combination of axiomatic design and the analytic hierarchy process. Thirty-one participants with varying levels of expertise (novice and advanced users) were involved in the study, considering the frequency of 3D printer usage (novice users: never, rarely; expert users: sometimes, almost always, always) for prototyping parts. They employed fused deposition modeling (FDM) and stereolithography (SLA) (both 3D desktop printers) and collected data on five evaluation criteria. The participation of experts helped establish a novel methodology, with material cost deemed most important (49.8%), followed by cycle time (28%), energy consumption (11.7%), error rate (6.6%), and equipment noise (3.9%). The results showed that FDM was the optimal equipment option for advanced users. By examining the information content of the other options, it was found that FDM demanded less information than SLA, regardless of the user’s level of expertise. The proposed method is appropriate to assess the sustainability aspect of FDM and SLA; however, it can be further improved by adding indicators such as environmental impact, recyclability, and ergonomic and occupational health factors
Study of musculoskeletal disorders risk factors and discomfort in sculptors in the north of Mexico
No full textBACKGROUND:
The sculpting craft must adopt awkward postures that lead to musculoskeletal disorders (MSDs).
OBJECTIVE:
This study investigated the prevalence of musculoskeletal discomfort (MD) and its associations with postural risk factors, demographics, and work characteristics among sculptors. They were determined the differences between MDs during the weeks of the study.
METHODS:
A longitudinal study was conducted; MD was investigated using the Cornell Musculoskeletal Discomfort Questionnaire (CMDQ). Posture was assessed using the Rapid Upper Limb Assessment method (RULA). Multivariate logistic regression (MLR) models analyzed associations with different factors. ANOVA was used to test for differences in MD prevalence.
RESULTS:
The analysis included 585 responses by body region. The prevalence of MD was high in the lower and upper limbs among sculptors (67.6%), with the lower back, upper arm, neck, and knees being the four most affected regions. Gender (female) (OR = 2.15), marital status (married) (OR = 1.80), health risk (obesity), the dual of a secondary job (OR = 1.94), job stress (OR = 2.10), duration of work (OR = 2.01), and difficulty keeping up with work (OR = 2.00) were significant predictors contributing to the occurrence of MD in different body regions. Only shoulder MD prevalence showed significant differences between study weeks.
CONCLUSIONS:
Sculptors suffer from MD. Demographic and work characteristic factors influence MD prevalence. Postural training, improved adaptation of work organization, and intervention guidance on ergonomic risks may reduce the prevalence of MD and the risk of MSDs in this population
The recouse to reasons in private international law
No full textThe author questions how to interpret the normative statements of private international law. He highlights the importance of solving “difficult cases,” according to hartian terminology. Jurists are faced with a complex activity that is made difficult using expressions outside the domestic forum that are not easy to mean. That is, given the specialty of the object language, the interpretation and application of international regulations normally presents a “difficult case” that requires the reformulator’s reasoning, weighing and proportionality of reasons, since it cannot be concluded only through a simple modus ponens., nor affirm that the right is already provided for. When interpreting, reasons must be given for making the final decision. In the case of international legal traffic problems, decision-making should never lack rationality, with the judge being the one who must carry out the most important activity: arguing. The conclusion reached is that although the final decision is important, the procedure to follow to reach that final decision is even more important
Pasar por Pawichiki
No full textEn 1983, el obispo José Llaguno encargó al jesuita Ricardo Robles Oyarzun, responsable de uno de estos proyectos, asentado en Pawichiki, que iniciara la redacción de un diario de campo
Carrera Ciclista Organizada por la UACJ.
No full textEs la grabación de una carrera ciclista organizada por la Universidad Autónoma de Ciudad Juárez UACJ. Desde los inicios de la universidad, ésta apoyó las actividades deportivas, descollándose el ciclismo como una de las actividades que más desarrollo alcanzó. La universidad contó con su equipo propio. El ciclismo de competición es un deporte en el que se utilizan distintos tipos de bicicletas. Hay varias modalidades o disciplinas como: ciclismo en carretera, ciclismo en pista, ciclismo de montaña, trial de ciclismo, ciclocross y dentro de ellas varias especialidades. El ciclismo de competición es reconocido como un deporte olímpico. La Unión Ciclista Internacional es el organismo gobernante mundial para el ciclismo y eventos internacionales de ciclismo de competició
Escenas de Toma de muestras al Personal Administrativo de la UACJ. Aula Magna.
No full textSon escenas de tomas de muestras de sangre, tomas de presión y demás aspectos similares al personal administrativo universitario, en una campaña de salud, en el Aula Magna de la antigua Rectoría de la Universidad Autónoma de Ciudad Juárez UACJ. Estas muestras fueron recolectadas por estudiantes de Medicina y Enfermería de la propia universidad. Las campañas mundiales de salud pública son una gran oportunidad para aumentar la concientización y los conocimientos sobre los problemas de salud y para movilizar apoyos en todos los ámbitos, desde el local hasta el internacional. A lo largo del año hay muchos días mundiales sobre problemas de salud o afecciones concretas, sin embargo, la Organización Mundial de la Salud OMS presta especial atención a los siete días y a la semanas que los Estados Miembros han designado como campañas mundiales de salud pública oficiales, estas son: el Día Mundial de la Tuberculosis, cada 24 de marzo; el Día Mundial de la Salud, cada 7 de abril; la Semana Mundial de la Inmunización, la última semana de cada mes de abril; el Día Mundial del Paludismo, cada 25 de abril; el Día Mundial Sin Tabaco, cada 31 de mayo; el Día Mundial del Donante de Sangre, cada 14 de junio; el Día Mundial contra la Hepatitis, cada 28 de julio y el Día Mundial del Sida, cada 1 de diciembre
Overview of Mexican Procedural Normativity Related to International Legal Traffic Issues
No full textThis document seeks to show an overview of the procedural regulations associated with international relations, especially the section of civil and family law, mainly, the new mexican civil and family procedural codification. This is a sketch of this part of it
Realidad aumentada como medio para el acercamiento a la historia mesoamericana.
No full textTrabajo de investigación en donde se utiliza la tecnología de realidad aumentada (RA), técnicas en 3D dentro de Blender y la interfaz de desarrollo Unity, para la creación de contenido de una aplicación para un libro con temática infantil histórico y de esa forma lograr despertar el interés del usuario en el área de la historia mesoamericana del continente americano
Himno nacional, La rancherita
No full textHabía maestro de música y nos enseñaban a cantar
La guitarra
Los tríos, las cumbias
Maestra Teresa
Maestro Joel
Maestros José Encarnación Montes Muñoz y Lucina B. de Monte