Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

One of the most predominant challenges in oral rehabilitation is to predict the functional and aesthetic results of dental restorations. The success of the treatment depends on the correct execution of the different clinical and technical procedures performed at the dental laboratory. One of the fundamental steps is the final impression to obtain a precise replica of the cervical termination line. The correct diagnosis for the approach regarding the gingival tissues, the fidelity of the dental impression, and the shaving of the gingival margins in the working model will allow the establishment of a complete protocol for the diagnosis, planning, and execution of the treatment, potentiating more predictable results in the different clinical cases. The aim of this case report was to propose an alternative technique for undergraduate students regarding the shaving procedure of the working dies, obtaining an improved fitting in the marginal adaptation of the prosthetic parts performed at the laboratory.

The torus are benign bony prominences that generally do not require treatment, however, they can occasionally present osteomyelitis (OM). The objective of this article is to describe the timely management of torus osteomyelitis through a series of clinical cases. Three patients with OM are reported. Two cases of men aged 66 and 69, diabetics, as well as a 57-year-old woman with a history of basal cell carcinoma of the nose. All had torus ulcers associated with trauma and without resolution of the same. In the three cases, a biopsy was performed to confirm the diagnosis and they were treated with anti-inflammatory drugs and antibiotic therapy, achieving complete resolution. Uncontrolled diabetes mellitus and trauma can favor the development of OM in patients with bone exostoses, therefore, when there are signs of infection in these structures, it is imperative to suspect the condition and offer treatment.

.

In recent years the demand of the urban mobility sector has become of a particular interest. The high dependency on mobility and the excessive use of cars in urban areas are matters of concern because the transportation systems are lead to unsustainable scenarios. This circumstance makes long-term planning highly relevant in trying to reverse this trend. There should be an integrating project that is based on the development of strategies according to indicators that show whether urban mobility is really intended to be sustainable, and at the same time its positive effects are maximized and the negative ones are mitigated. This paper proposes a new method for calculating such indicators and sustainability relationships for long-term decision-making, in order to analyze urban mobility in Tuxtla Gutiérrez and achieve sustainable urban mobility environments. A methodical analysis is made of the flows that intervene in the dynamic functioning of urban mobility and its different alternatives, by evaluating all the energy used in this process (all this energy is called eMergy), of the different components for quantify them in identical units. With this evaluation we attempt to know the emergetic flows and deposits of the different mobility alternatives. The sustainability indices and other correlations that indicate the degree of dependence on urban mobility were also calculated, the results are shown graphically. Finally, an analysis of the environmental burden is presented, showing how environmentally friendly the current urban mobility system can be. It was found that the bicycle is the mobility alternative that consumes less eMergy and that the one that consumes the most eMergy is the Conejobús. Regarding the eMergy index per kilometer per person per type of unit, it is shown that the Conejobús is the most efficient modality above collective transport and bicycles. With respect to total eMergy index of mobility by type of alternatives, the most efficient was the Conejobús followed by collective transport and bicycles.

The purpose of this paper is to determine the trends of commercialization of knowledge from researchers of the Universidad Autonoma del Estado de Morelos (UAEM) through patenting and entrepreneurial activities. We study the segment of teachers-researchers, mostly members of the National System of Researchers (SNI), who have applied for patents aided by the internal Knowledge Transfer Office of this institution (KTO-UAEM), as well as the motivations and restrictions to develop intellectual property protection, based on the application of semi-structured in-depth interviews. The originality of this work lies in obtaining, a broad insight into the opinions of the academic community on the third mission of the University, specifically, on the patenting and commercialization of inventions. It also presents information on the development of technology transfer within the context of a public university, which already stands out in these activities at the national level, as well as its interest in transformation, towards an institution more congruent with the current environment, which seeks to transfer the generated knowledge for the benefit of society. The impact of national intellectual property policies and incentives, as well as, the little commercialization of results, have implied a reduction of the interviewees' interest in continuing to apply for patent registration. On the other hand, entrepreneurship by researchers, also mostly members of the SNI, and their students, is an outstanding activity. 

The paper shows a support free tool for the learning-teaching process of reinforced concrete wall design in the Civil Engineering field. These structural elements are used in Mexico for buildings and dwelling houses construction. Then, their structural design is an important topic for the students. The algorithm was implemented in a spreadsheet, which shows the operations and decision making required to compute the bending-axial load strength curve (MR-PR). In addition, for a pair of mechanical design elements (MU, PU), it calculates the action/resistance ratio. Basic knowledge of arithmetic, analytical geometry, matrix algebra, and the Mexican standard were applied in the development. According to the user's preference, the data vector can be modified. Although a simplified envelope strength curve formed by seven points (MR-PR) was obtained, its accuracy is adequate compared to a commercial application results, 98% and 87%, for the nominal and strength curve, respectively. The application shows to the students an introduction to the abstract thinking required in the automation of calculation processes and it can guide them in the implementation of their own applications for strengthening of specific competences.

Estas notas contienen una colección breve de problemas de mecánica clásica newtoniana pensados para el entrenamiento en Olimpiadas de Física de la selección nacional mexicana de 2020 que represento a México en olimpiadas internacionales, sumándose así a colecciones similares que ya existen. Algunos problemas fueron recopilados de fuentes clásicas como problemarios u otras olimpiadas y son bien conocidos, otros los he modificado o inventado para formar una colección que incluya problemas originales en el espíritu de la (hoy extinta) Editorial Mir y el estilo de problemas de Olimpiada de Física de la “vieja escuela”. Las respuestas a los problemas se dan al final del texto con diferentes grados de detalle en la resolución, mientras que en algunos casos se dan soluciones completas en otros se muestra únicamente la respuesta. Esto es intencional y tiene como propósito incentivar al lector a encontrar soluciones propias y originales a los problemas propuestos que se presentan así como un reto en el proceso de aprendizaje. Siguiendo la tradición de los problemas de olimpiadas se han propuesto problemas elementales, pero no sencillos. Esta breve colección de problemas también podría ser de utilidad como material complementario en cursos de mecánica clásica en el nivel superior. Quiero agradecer a Dalí Pinto y Jairo Villalobos, estudiantes de la licenciatura en Física de la Universidad Autónoma de Chiapas, por ayudarme a elaborar las figuras y diagramas, así como por interminables discusiones de problemas de física y matemáticas. Aunque el manuscrito ha sido revisado en varias ocasiones cualquier error que subsista en el mismo es responsabilidad mía, y por esto apelo a los lectores que si encontraran errores me lo hicieran saber al correo idrish.huet@gmail.com a fin de que pudieran corregirse en una versión posterior. Espero que estos problemas sean interesantes para los estudiantes de olimpiadas y tan interesantes y útiles en esta etapa de su aprendizaje de la física, como en su momento otras colecciones similares de problemas lo fueron para mí.

Emerging diseases that affect crops on shrimp farms cause significant economic losses to aquaculturers, in most cases good management practices are not implemented in production systems, because of the established biosecurity standards that are not the adequate ones, favoring the introduction and dispersion of pathogenic organisms, such is the case of Acute Hepatopancreatitis Necrosis (AHPND), an infection that appeared at the end of 2013 in shrimp crops in Mexico. It also analyzes and discusses the impacts, the control measures that this transboundary disease faces in the Mexican territory from the outbreak.

This article offers a view on different short-story books written by Mexican author Rosario Castellanos. It uses the general structure of the story as a guideline, primarily focused on the author's personal definition. Having adopted such perspective, I shall focus on the characters despite the fact that the situation, the environment and the main topic flow in a peculiar manner. Said manner conforms the social, psychological and ideological concerns of the author who is able to describe them extremely accurately thanks to the use of certain techniques embedded in the genre. The aim is then, to define and establish the mechanism through which the construction of the "significant moment", within which both characters and actions converge, as the central element of the story.

The objective of this work was to determine the main features to be evaluated in the teaching performance from the opinion of the students from the dimensions: personal, disciplinary, didactic - pedagogical and professional that allow feedback to the instrument of evaluation of the teaching performance via the opinion of the student used in the Faculty of Education Sciences of the UATx. A study was carried out under the quantitative approach, analyzing the responses of 204 students belonging to the two degrees offered by the Faculty of Education Sciences of the Autonomous University of Tlaxcala: Educational Sciences and Educational Communication and Innovation. It was found that the main features to evaluate are related to didactic planning, learning evaluation strategies, the interpersonal teacher-student relationship, as well as assiduity and punctuality. keywords: Teacher evaluation; evaluation of teacher performance; modalities of teacher evaluation; features of teacher performance evaluation