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1
artículo
The objectives of the study were to determine the psychometric properties of the Scale of Attitudes towards Statistics in Mexico. In this instrumental study, a non-probabilistic sample of 383 Mexican psychology students who responded to two attitude scales was analyzed. The bifactor model with three specific factors (safety, pleasure-usefulness, and motivation) showed the best properties of fit and convergent validity. The average attitude was neutral and more positive in men than in women. The general factor had a high correlation with attitude towards research. It is concluded that the three-factor bifactor model represents the relationship between the items better than the original five-factor model.
2
artículo
Publicado 2023
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The research analyzes the problem of instability of the slope of a critical section and develops a value on the slope of the Puente San Gerónimo - Puente Raymondi road section. The geotechnical characterization was carried out from in situ exploration, obtaining representative samples and laboratory tests to classify according to SUCS and ASHTO and the following was obtained: ϕ = 32.31° y c=17.65 kN/m2, specific weight = 16.97 kN/m3. From the stability analysis using the limit equilibrium method, the safety factors: for the natural slope FS=0.86 and for the stabilized slope FS=1.20.The research design is experimental. The development of the slope on a reduced scale for the natural slope and the stabilized slope was carried out for three specimens, in which the following were determined: forces, deformations and applied stresses; developing the comparative analysis of the slopes, such ...
3
artículo
Publicado 2023
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The objective of the work is to implement a Management system for the use of construction and demolition waste (RCD) from public and private works. The information used is the works carried out in the urban area of the Independencia district in the period 2010 to 2015 (91 works by contract modality and 34 by direct administration) that contains: Name of the work, SNIP code, start date and Completion of the work and budgeted activity related to RCD: removal of surpluses, demolition of concrete structures, demolition of asphalt pavement, demolition of masonry, demolition of adobe construction, extraction of existing and total concrete pipes. The survey to determine the factors and degree of user acceptance, for the use of RCD, was validated by three experts and addressed to the general user public of the District of Independencia, and another for professional builders and engineers. ...
4
tesis de maestría
En la producción química moderna, los procesos de destilación son frecuentemente utilizados como método de separación de líquidos. Modelar una columna de destilación nos permite predecir el comportamiento del sistema. El modelado de sistemas es una importante, y sin embargo a veces descuidada, disciplina de la ingeniería de control. Esta tesis de maestría se centra en el modelado de la columna de destilación a escala de laboratorio situada en el Instituto de automatización de la Universidad Técnica de Ilmenau. Esta columna, utilizada principalmente para la enseñanza y la investigación, separa el etanol y el agua en diez etapas. El modelo teórico del sistema se realiza utilizando el modelo de primeros principios (FPM), principalmente las ecuaciones MESH para representar las ecuaciones altamente no lineales, que incluyen el equilibrio de masa, las relaciones de fase de equil...
5
tesis de maestría
En la producción química moderna, los procesos de destilación son frecuentemente utilizados como método de separación de líquidos. Modelar una columna de destilación nos permite predecir el comportamiento del sistema. El modelado de sistemas es una importante, y sin embargo a veces descuidada, disciplina de la ingeniería de control. Esta tesis de maestría se centra en el modelado de la columna de destilación a escala de laboratorio situada en el Instituto de automatización de la Universidad Técnica de Ilmenau. Esta columna, utilizada principalmente para la enseñanza y la investigación, separa el etanol y el agua en diez etapas. El modelo teórico del sistema se realiza utilizando el modelo de primeros principios (FPM), principalmente las ecuaciones MESH para representar las ecuaciones altamente no lineales, que incluyen el equilibrio de masa, las relaciones de fase de equil...
6
artículo
Publicado 2023
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The UPPS-P scale is widely used to assess impulsivity. For this reason, the psychometric properties of the extensive version of UPPS-P were analyzed from the Rasch polytomous model. Eight hundred Argentine adolescents aged 12 to 18 years participated in the study. As a result, it was found that the dimensions of the UPPS-P presented an adequate fit to the Rasch model, adequate levels in the Person Separation Index (PSI), some items with local dependence and an adequate level of unidimensionality. It is concluded that the scale is a valid instrument to assess impulsivity in adolescents; therefore, a conversion table with interval scores is presented to increase the measurement precision of the instrument.
7
artículo
Publicado 2025
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The use of small-scale physical models is a key tool in coastal engineering for representing phenomena such as wave propagation and the effects of coastal structures in breaking zones. This study presents the design and construction of a small-scale physical model applied to Playa Carpayo, located on the coast of Callao, Peru. Vertical and horizontal hydraulic similarity scales of 1:16.7 and 1:180.5, respectively, were used based on Froude similarity, with base maps generated from satellite imagery (Google Earth) and bathymetric data (NAVIONICS and DIHIDRONAV). The model was built in the wave-generating channel of the Laboratory of Hydraulics and Physical Models at EPIMF-FCF-UNMSM, allowing the simulation of wave transformation between T- and L-shaped groynes. Measurements were taken at two representative points: 100 m and 50 m from the prototype shoreline, recording significant wave...
8
tesis doctoral
Publicado 2018
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El objetivo de este trabajo es presentar un estudio de inferencia y diagnóstico de una extensión de la familia de distribución vitalicia propuesta por Birnbaum y Saunders. Esta extensión se obtiene considerando una distribución sesgada-elíptica en lugar de la distribución normal. Específicamente, en este trabajo se desarrolla un tipo de distribución Birnbaum-Saunders (BS) basado en mezclas a escala de distribuciones asimétricas normales (SMSN). La familia resultante de distribuciones de por vida representa una extensión robusta de la distribución habitual de BS. Con base en esta familia, se reproduce las propiedades habituales de la distribución BS y se presenta un método de estimación basado en el algoritmo EM. Además, se presentan modelos de regresión asociados con las distribuciones BS (basadas en mezclas a escala de skew-normal), que se desarrollan como una extensió...
9
artículo
The goal of this investigation is to develop a model forthe evaluation for performance evaluation in the teachingfunction. The research consisted in characterizing anevaluation model, as well as the construction and designof four scales focused in students, immediate authorities,colleagues and teachers. A pilot study was applied using apopulation census conformed by the active professors andtheir attending students at the moment of the application.The scales were put under validation of content byjudgment of experts. The collected data was analyzedusing Factorial Analysis and Discriminant Validity to provethe validity; also, the Alpha of Cronbach was used for itsreliability for obtaining definitive instruments.
10
artículo
Publicado 2018
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Esta investigación tiene dos objetivos. El primero consiste en evaluar la sensibilidad estadística de la renta como medida de escasez de un recurso natural, hacia las especificaciones econométricas de la función de costo variable, de la que puede derivarse, con el fin de examinar si los supuestos para formular el modelo econométrico generan diferencias estadísticamente relevantes en la renta estimada. El segundo objetivo de la investigación consiste en determinar si las decisiones ejecutivas de investigación y la consistencia teórica del modelo afectan el contenido informacional de la renta, como medida de escasez de dicho recurso. La muestra consiste en series de tiempo de 1953 a 1985 de la industria de asbestos en Canadá. Se evidencia que estas decisiones sí generan diferencias pero no como para afectar la consistencia informacional de la renta. En particular, los r...
11
artículo
Publicado 2018
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Esta investigación tiene dos objetivos. El primero consiste en evaluar la sensibilidad estadística de la renta como medida de escasez de un recurso natural, hacia las especificaciones econométricas de la función de costo variable, de la que puede derivarse, con el fin de examinar si los supuestos para formular el modelo econométrico generan diferencias estadísticamente relevantes en la renta estimada. El segundo objetivo de la investigación consiste en determinar si las decisiones ejecutivas de investigación y la consistencia teórica del modelo afectan el contenido informacional de la renta, como medida de escasez de dicho recurso. La muestra consiste en series de tiempo de 1953 a 1985 de la industria de asbestos en Canadá. Se evidencia que estas decisiones sí generan diferencias pero no como para afectar la consistencia informacional de la renta. En particular, los r...
12
artículo
Publicado 2018
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Esta investigación tiene dos objetivos. El primero consiste en evaluar la sensibilidad estadística de la renta como medida de escasez de un recurso natural, hacia las especificaciones econométricas de la función de costo variable, de la que puede derivarse, con el fin de examinar si los supuestos para formular el modelo econométrico generan diferencias estadísticamente relevantes en la renta estimada. El segundo objetivo de la investigación consiste en determinar si las decisiones ejecutivas de investigación y la consistencia teórica del modelo afectan el contenido informacional de la renta, como medida de escasez de dicho recurso. La muestra consiste en series de tiempo de 1953 a 1985 de la industria de asbestos en Canadá. Se evidencia que estas decisiones sí generan diferencias pero no como para afectar la consistencia informacional de la renta. En particular, los r...
13
artículo
Publicado 2025
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Personality tests are used regularly as a requirement within many sectors in Brazil, including education, human resources, and transportation. The Personality Factor Inventory, based on Murray’s system of needs theory, is one of the widely used tools within Brazil. Despite its importance, its results are only partially related to the Big Five theory, which is the predominant framework for understanding personality. This theoretical divergence poses practical challenges for professionals who rely on or are required to work within the Big Five model. Harmonizing these two theories could enhance their practical utility. In this study, we evaluate the possibility of fitting Murray’s personality theory within the Big Five framework using Exploratory Structural Equation Modeling and invariance tests (i.e., gender) using data from 272 845 participants in Brazil (56.2% men, M age 21.74 ± 15...
14
artículo
We describe the process by which items of a belief scale in obesity and bariatric surgery were generated using mixed methods. Participants were 22 Ecuadorian bariatric patients between 22 and 50 years old (M = 37.5, SD= 8.91). A semi-structured interview was constructed, validated, and conducted. The information was analyzed using directed content analysis, guided by the Health Belief Model. The beliefs varied according to sociodemographic and clinical characteristics, particularly age, sex, surgical technique, and postoperative evolution. The level of susceptibility, severity and benefits were mainly associated with the consequences of the loss of psychological well-being and social acceptance. Meanwhile, a greater perception of barriers was found in women, people who experienced negative emotions and those with less social support.
15
artículo
Proposal, Development and Validation of the Scale Distance Higher Education Service Quality (DIHESQ)
Publicado 2022
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Higher education sectors have experienced high levels of competence. In this scenario, some universities have responded through the offer of studies in non-traditional modality (distance). Various scales have been proposed to measure the quality of service in higher education, but few studies have focused on distance modality (non-traditional modality). This is relevant, since distance higher education has characteristics that differentiate it from higher education in traditional modality (presential). Given this, this research focuses on the proposal, development and validation of a scale of service quality measurement in distance higher education, which is called “Distance Higher Education Service Quality Service” (DIHESQ). A three-stage methodology is applied. First, the DIHESQ measurement scale is proposed ensuring its content validity, later the analysis of unidimensionality is ...
16
artículo
Publicado 2025
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Most evaluation activities involve classifying students into categories. Especially in high-stakes assessments, such classification carries significant responsibility due to the ensuing consequences. Raw scores do not reflect the nature of measurement error or its implications for student classification. In contrast, the Rasch model offers an approach based on the relationship between the probability of answering an item correctly and the difference between the student’s ability and the item’s difficulty, an approach that allows for the calculation of standard errors associated with item and person measures. Within this framework, this study aims to investigate whether concentrating items around a cutoff point improves classification accuracy, measured using Rudner’s accuracy index. This relationship was examined under three scenarios with varying levels of student dispersion. The ...
17
artículo
Publicado 2019
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The overlap between depression and anxiety is a widely-replicated finding in mental health research. The Depression, Anxiety, Stress Scales (DASS-21) were developed to maximize the discrimination between these constructs. However, research suggests that DASS-21 predominantly measure an overall factor of emotional distress. In this study, DASS-21 were translated and applied to 353 university students (Mage = 20.42; 61% women) from Lima, Peru. The confirmatory factorial analysis supported a bifactor model, but additional analyses revealed that the data were essentially one-dimensional. Moreover, when the items were subjected to a bifactor exploratory analysis, some did not load into their original specific factors. The conclusion was that DASS-21 must be interpreted as a global dimension of emotional distress.
18
artículo
Publicado 2019
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The overlap between depression and anxiety is a widely-replicated finding in mental health research. The Depression, Anxiety, Stress Scales (DASS-21) were developed to maximize the discrimination between these constructs. However, research suggests that DASS-21 predominantly measure an overall factor of emotional distress. In this study, DASS-21 were translated and applied to 353 university students (Mage = 20.42; 61% women) from Lima, Peru. The confirmatory factorial analysis supported a bifactor model, but additional analyses revealed that the data were essentially one-dimensional. Moreover, when the items were subjected to a bifactor exploratory analysis, some did not load into their original specific factors. The conclusion was that DASS-21 must be interpreted as a global dimension of emotional distress.
19
artículo
Publicado 2024
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This study proposed the design of three brief scales coherent with and contributing to the pedagogical perspective of schoolteachers, aiming to enhance self-regulated learning and psychological well-being of students. With the participation of teachers and other professionals who provided feedback throughout the process, scales for school motivation (ME), frustration tolerance (TF), and school satisfaction (SE) were designed and validated among 1260 students from 7th to 12th grade (57.7% female, mean age M=14.9 years, SD=1.9) belonging to three educational institutions in northern Chile. Descriptive, correlational, reliability, and confirmatory factor analysis (CFA) measures obtained indicated adequate psychometric behavior in all scales. As a result of the validation process, the report indicates that the instruments meet psychometric criteria for application in the school context and c...
20
artículo
Publicado 2003
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This article shows the competitive strategies stated by Michel Porter to keep and/or widen an enterprise within an industrial sector in a free-competence market. Such an analysis focuses on peruvian reality.
