Associating cell complexes to four dimensional digital objects

The goal of this paper is to construct an algebraic-topological representation of a 80–adjacent doxel-based 4–dimensional digital object. Such that representation consists on associating a cell complex homologically equivalent to the digital object. To determine the pieces of this cell complex, algorithms based on weighted complete graphs and integral operators are shown. We work with integer coefficients, in order to compute the integer homology of the digital object

An efficient algorithm to compute subsets of points in ℤ n

In this paper we show a more efficient algorithm than that in [8] to compute subsets of points non-congruent by isometries. This algorithm can be used to reconstruct the object from the digital image. Both algorithms are compared, highlighting the improvements obtained in terms of CPU time

Algebraic tools in geometrical modeling with topological control

In this paper we show a method to create a look-up table with all the possible bricks which can made up an object. Moreover, we generate a procedure to recreate any object starting from this table. More concretely, the procedure is divided into two stages: (1) choosing the bricks of the table which made up the given object; and (2) merging these bricks to recreate the object

Getting topological information for a 80-adjacency doxel-based 4D volume through a polytopal cell complex

Given an 80-adjacency doxel-based digital four-dimensional hypervolume V, we construct here an associated oriented 4–dimensional polytopal cell complex K(V), having the same integer homological information (that related to n-dimensional holes that object has) than V. This is the first step toward the construction of an algebraic-topological representation (AT-model) for V, which suitably codifies it mainly in terms of its homological information. This AT-model is especially suitable for global and local topological analysis of digital 4D images

New Burnout Evaluation Model Based on the Brief Burnout Questionnaire: Psychometric Properties for Nursing

Health care personnel are considered one of the worker sectors most exposed to heavier workloads and work stress. One of the consequences associated with the exposure to chronic stress is the development of burnout syndrome. Given that evaluating this syndrome requires addressing the context in which they are to be used, the purpose of this work was to analyze the psychometric properties and structure of the Burnout Brief Questionnaire (CBB), and to propose a more suitable version for its application to health professionals, and more specifically nurses. The final study sample was made up of 1236 working nursing professionals. An exploratory factorial analysis was carried out and a new model was proposed through a confirmatory factorial analysis. Thus, validation of the CBB questionnaire for nursing health care personnel showed an adequate discrimination of the items and a high internal consistency of the scale. With respect to the factorial analysis, four factors were extracted from the revised model. Specifically, these new factors, called job dissatisfaction, social climate, personal impact, and motivational abandonment, showed an adequate index of adjustment. Thus, the Brief Burnout Questionnaire Revised for nursing staff has favorable psychometric properties, and this model can be applied to all health care professionals

Analysis of the Risk and Protective Roles of Work-Related and Individual Variables in Burnout Syndrome in Nurses

Aims: Burnout syndrome is a phenomenon that is becoming ever more widespread, especially in workers such as nurses who have heavy workloads and time pressures. The progression of burnout syndrome has been shown to be related to both individual and work-related variables. The objective of this study is to examine the risk and protective roles played by work-related and personal variables, both sociodemographic and psychological, in the development of burnout in nurses. Method: The sample was composed of 1236 nurses aged between 21 and 57 years, with a mean age of 31.50 years (SD = 6.18). Women accounted for 84.5% (n = 1044), and the remaining 15.5% (n = 192) were men. Exploratory tests were performed to understand the relationships between burnout and other variables, and a binary logistic regression was conducted to understand the roles of these variables in the incidence of this syndrome. Lastly, a regression tree was constructed. Results: The results show that the sociodemographic variables examined are not related to the level of burnout in nurses. However, certain work-related variables, such as spending more time with colleagues and patients and reporting good-quality relationships, exhibit a negative relationship with the occurrence of burnout. Of the psychological variables, the stress factors conflict-social acceptance and irritability-tension-fatigue, as well as informative communication, are shown to be risk factors for the appearance of burnout in nurses. In contrast, the communication skills factor, empathy, and energy-joy exert a protective function. Conclusion: Identifying the variables that influence the occurrence of burnout syndrome and understanding the manner in which they exert their influence are key elements in the development of effective prevention and intervention of burnout in nursing

Biological Effects of Food Coloring in In Vivo and In Vitro Model Systems

(1) Background: The suitability of certain food colorings is nowadays in discussion because of the effects of these compounds on human health. For this reason, in the present work, the biological effects of six worldwide used food colorings (Riboflavin, Tartrazine, Carminic Acid, Erythrosine, Indigotine, and Brilliant Blue FCF) were analyzed using two model systems. (2) Methods: In vivo toxicity, antitoxicity, and longevity assays using the model organism Drosophila melanogaster and in vitro cytotoxicity, DNA fragmentation, and methylation status assays using HL-60 tumor human cell line were carried out. (3) Results: Our in vivo results showed safe effects in Drosophila for all the food coloring treatments, non-significant protective potential against an oxidative toxin, and different effects on the lifespan of flies. The in vitro results in HL-60 cells, showed that the tested food colorings increased tumor cell growth but did not induce any DNA damage or modifications in the DNA methylation status at their acceptable daily intake (ADI) concentrations. (4) Conclusions: From the in vivo and in vitro studies, these results would support the idea that a high chronic intake of food colorings throughout the entire life is not advisable

Redes sociales y relaciones interpersonales en los estudiantes de básico superior de la Institución Patria Ecuatoriana de Daule, 2021

El uso de la tecnología en la actualidad es algo cotidiano, asimismo el socializar por medio de diferentes redes cibernéticas es parte de la nueva cultura; no obstante ello puede ser factor del déficit de diferentes habilidades naturales del ser humano, como la comunicación, actitudes y el trato del mismo; en ese sentido la investigación presente tuvo como principal finalidad Determinar la relación existente entre las relaciones interpersonales y redes sociales; para lograrlo fue necesario emplear una metodología de enfoque cuantitativo y de nivel correlacional asociativo, además el diseño fue no experimental y de corte transversal; por otro lado como instrumentos se empleó un cuestionario por variable, mismos que fueron validados por tres expertos y obtuvieron una fiabilidad mayor al 0.70; se aplicaron a 105 estudiantes de básico superior de la Institución Patria Ecuatoriana de Daule. El resultado con mayor importancia arrojó la existencia de relación entre las variables de estudio, con ayuda del estadístico de Spearman se obtuvo una significancia de 0.001 y un coeficiente rho igual a -0.310; es otras palabras, gracias a la evidencia estadística se acepta la hipótesis alterna del estudio; en ese sentido, es factible concluir que, al reducirse los niveles de uso de las redes sociales, los niveles de las relaciones interpersonales aumentan en un 31%

Obtaining cell complexes associated to four dimensional digital objects

In this paper, we determine a cell complex representation of a 80–adjacent doxelbased 4-dimensional object. The homological information of this polyhedral cell complex can be employed to specify topological features and characteristics of a digital object. This homological information (for example, Euler characteristic, homological classification of cycles, homology generators, relations among them...) of a discrete object can be extracted from some specific boundary operators for each cell of an object (see [3]). The different (up to isometry) polyhedral cells are 400 configurations and their local boundary information can be suitably glued for determining the global boundary of an object and consequently, its corresponding homological information. This fact allows us to implement this technique using a look-up table for the different basic configurations and its corresponding boundary operators