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We still know little about the psycho-organizational antecedents related to the prevention of acts of corruption in government. This empirical study examines the distinctive impact of two emotions with negative valence, fear and anger, as catalysts or inhibitors of whistleblowing among public employees. Through an experimental study with local government officials in Mexico, we show that people who experience anger are significantly more likely to report acts of corruption, especially when exposed to high-intensity stimuli. On the other hand, intense fear can powerfully inhibit whistleblowing. These findings provide relevant evidence of the impact of emotional cues on whistleblowing in the context of a government organization. Based on these results, we suggest that emotion management could be an effective tool to improve integrity levels in public bureaucracies. [ABSTRACT FROM AUTHOR]

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article presents an analysis of media effects articles published in JMCQ from 1954 to 2020. Although the primary focus of our sample of articles focused on news, a wealth of additional topics were also examined, including attitude change, media selection, and sharing of media content. While some of this body of scholarship reflects more "traditional" conceptualizations of media effects research, others point to a broader conceptualization that reflects individuals as active in their selection, processing, evaluation, and even creation of media content. [ABSTRACT FROM AUTHOR]

In telecommunications, optical media are importance for their data transmission characteristics, especially in waveguide item. This work studies a basic optical fiber characterization since one implementation of a SONET STS-1 laboratory. It studies parameters such as delay and attenuation. This laboratory uses the virtual and distance education model implemented by the Degree in Telecommunications Engineering. Also, it gets experimental results from the EMONA TIMS training platform. The work methodology was action-research and experimental. The main result is the students get significant learnings about optical fiber characterization under virtual and distance education model. Also, the experimental results verify the data provided by the platform on the fiber patch cord. Finally, the main conclusion is the teaching method is very important to get significant learning. The laboratory can be virtual and remote, what is important is the laboratory has a good guide and the platform should be robust. [ABSTRACT FROM AUTHOR]

RESUMO Sonegação fiscal continua sendo um problema relevante no Brasil e no mundo. A Economia Comportamental tem buscado compreender este comportamento por meio da realização de experimentos que visam entender o processo decisório dos indivíduos. Este trabalho se propõe a analisar como a estrutura do contexto de tomada de decisão pode influenciar a eficácia das intervenções comportamentais que buscam aumentar a conformidade fiscal. Por meio de análise de conteúdo de artigos científicos da área, foram identificadas cinco categorias contextuais que influenciam os experimentos. Assim, a pesquisa provê entendimento sobre os aspectos contextuais e como estes influenciam no desenho das intervenções.

Copyright of Revista Fotocinema is the property of Revista Fotocinema and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this article, a bibliographical review of some methodologies of design of experiments is carried out, focusing on its function and relevance within the experiments, where the importance of the designs of experiments within the investigation is highlighted using examples of the strategies and designs of experiments. In the first place, a review was carried out that would allow the introduction of the concept of design of experiments, how it was conceived, its principles and its relationship with the investigation, including the main elements of which designs of experiments are composed, and some assumptions to be considered at the time of apply an experimental design in research are included. In addition, different methodologies used by some authors in experiments are shown, what they are and a basic notion of the different methodologies used in the research, focusing on the differences between each one of them and why to use them according to the need of the experiment, then from this, different examples of the different experimental design methodologies used in research articles focused on polymeric materials were carried out, in these examples the different variables of the experiment were stood up, what was the purpose of the investigation and why they opted for the design of experiments they mention. Finally, after carrying out the bibliographical review, it was found that in most of the experimental design applied to the field of experimentation, it allows optimizing the resources without the need to make many attempts. In fact, depending on the type of experiment, it will be feasible to choose a design that is accommodate the needs of the researchers, according to the objectives set in the experiment. [ABSTRACT FROM AUTHOR]

O objetivo deste ensaio é discutir as potencialidades e, sobretudo, os limites do emprego de métodos experimentais e quase-experimentais na avaliação de programas públicos. Inicia-se com uma breve apresentação do desenho experimental clássico, seus requisitos e conceitos relacionados, como validades interna, externa e contrafatual. Em seguida, são abordadas as modalidades de desenhos quase-experimentais de avaliação, modelos que flexibilizam os requisitos do experimento clássico. Em duas seções de natureza crítica, apontam-se as limitações éticas, políticas e operacionais dos desenhos experimentais e quase-experimentais na avaliação de programas e, depois, as motivações político-institucionais da resiliência dessa abordagem diante de conhecidos e recorrentes problemas de robustez.

Este artículo propone un análisis de los vídeos de contenido científico que se difunden en la red social TikTok. La investigación tiene como Objetivo General realizar una de las primeras radiografías de la divulgación y representación de los contenidos científicos en una red social cuya audiencia es mayoritariamente joven. Para ello se plantea un análisis del origen de las imágenes, de la temática y duración de estos vídeos, del nivel de interacción y del tipo de usuarios que difunden estos contenidos. La investigación recopila una muestra de los 300 vídeos más populares de temática científica. Los vídeos de la muestra acumulan 936 millones de visualizaciones y han sido subidos por un total de 182 creadores. En la investigación detectamos que el vídeo científico en TikTok prototípico recurre mayoritariamente a imágenes grabadas por los creadores, con una duración media de 1 minuto y 54 segundos, con una temática basada en experimentos científicos y con una tasa de interacción baja (aunque es más destacable en los likes frente a los comentarios). Además, se detecta que no hay una concentración por parte de los creadores al premiar la aplicación el contenido frente a su origen.

Copyright of Retos, Revista de Ciencias Administrativas y Económicas is the property of Universidad Politecnica Salesiana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

There is increasing concern about the effectiveness of public policies, both at the academic and practical level. Public policy analysis gets more technical every day, and multiple tools are required to establish the causal effect of a policy. In this article, we present an overview of some of the most suitable experimentation-based techniques for this purpose. We examine laboratory and field randomised experiments, on-line experiments and natural experiments. We also address some of the most common caveats of using experiments in public policies, such as validity of results or ethics. Despite possible hassles, the inclusion of experiments in public policy analysis has become the norm in international organisations, and that process is also starting in Spain. Mastering the techniques we present here, as well as understanding their relevance and limitations, is essential for anyone interested in the field of public policy. This article serves as an introduction and guide in that learning. Including experimentation in public policy analysis, we can obtain robust results upon on which build more efficient and effective policies. [ABSTRACT FROM AUTHOR]

el crowdfunding de recompensa es una interesante alternativa de financiación para iniciativas emprendedoras en su etapa inicial. Entre los factores que facilitan el éxito en dichas campañas destaca el comportamiento gregario, es decir, la tendencia a imitar las decisiones de financiación de los anteriores mecenas. El efecto gregario, o de rebaño, se ha demostrado robusto en investigaciones anteriores como un acto racional que apoya campañas con mayor probabilidad de conseguir el objetivo de financiación impuesto, su éxito. En este artículo se va más allá de ese resultado empírico de la literatura previa y se analiza si el comportamiento gregario se produce en el crowdfunding de recompensa incluso sin factor racional, como simple imitación de un comportamiento anterior, independientemente de la motivación racional del éxito del proyecto. Para ello, se diseña y ejecuta un experimento en una campaña real de financiación de un proyecto cultural en la plataforma Verkami, la más potente para proyectos culturales en España. Este experimento de campo permite analizar la causalidad entre las decisiones de los mecenas anteriores sobre el color de una recompensa y las elecciones de los mecenas siguientes. Los resultados muestran claramente un comportamiento gregario no racional en las elecciones de los siguientes mecenas en el crowdfunding de recompensa, que escogen mayoritariamente el mismo color que las aportaciones iniciales. El artículo confirma la importancia del componente no racional en la conducta gregaria en crowdfunding.

Existe una preocupación creciente por la efectividad de las políticas públicas, tanto a nivel académico como práctico. El análisis de políticas públicas es cada vez más técnico y requiere de múltiples técnicas para establecer de forma robusta el efecto causal de una política. En este artículo, repasamos algunas de las técnicas basadas en la experimentación más adecuadas para este fin. Examinaremos el uso de experimentos aleatorizados tanto de laboratorio como de campo, experimentos virtuales o experimentos naturales. A su vez, abordamos también algunos problemas habituales en el trabajo experimental en políticas públicas, como la validez de los resultados o la ética. A pesar de los posibles inconvenientes, la incorporación de la lógica experimental al análisis de políticas públicas es en la actualidad el patrón de referencia en las principales instituciones internacionales, y así empieza a ser también en España. El manejo de las técnicas que aquí repasamos, así como entender su importancia y limitaciones, se hace imprescindible para cualquier persona interesada en el ámbito de las políticas públicas. Este artículo sirve de introducción y guía en ese aprendizaje. Añadiendo la experimentación a nuestros análisis, podremos obtener resultados robustos sobre los que construir futuras políticas más eficientes y efectivas

Tax evasion remains a relevant problem in Brazil and worldwide. Behavioral Economics has sought to understand this behavior by carrying out experiments that aim to understand the decision-making process of individuals. This work aims to analyze how the structure of the decision-making context can influence the effectiveness of behavioral interventions that seek to increase tax compliance. Through content analysis of scientific articles in the area, five contextual categories were identified that influence the experiments. Thus, the research provides an understanding of contextual aspects and how they influence the design of interventions. [ABSTRACT FROM AUTHOR]

Natural forest´s covers are changing due to the spread of the urban, agricultural and livestock frontier, affecting the availability of shelters and resources for the breeding of birds. Despite our knowledge of the influence of anthropic interventions on biodiversity, investigations that show the anthropic effect on natural history of birds, included the breeding phase, are limited. To describe the anthropic effect on nest predation, 108 artificial nests were established in an anthropic intervention gradient in the jurisdiction of Leticia, Amazonas, Colombia. The 38 nests that were predated, six were in the site with the least anthropic intervention, 15 in the intermediate intervention site and 17 in the site with the highest intervention. In particular, the effect of changes in the vegetation cover mediated by anthropic disturbance on bird nests is assessed, expecting that denser vegetation cover around the nest will positively affect the nest success. Variables associated with the structure of the vegetation near the nests (e.g., Coverage around the nest, low vegetation cover, canopy opening), showed a significant positive relationship with the destination of the nest. This research suggests that the ongoing urbanization process (e.g., house construction and roads) in the Amazon region influences loss of artificial nests, and that changes in the structure of the vegetation mediated by the degradation of natural covers could play a fundamental role in the predation of nests. [ABSTRACT FROM AUTHOR]

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Este artigo apresenta resultados de uma pesquisa de natureza qualitativa realizada com estudantes do Ensino Médio de uma Escola Pública da cidade de Maringá-PR, com o objetivo de responder à pergunta: que potencialidades pedagógicas, na aprendizagem do conceito de viscosidade, são reveladas pelo conto “Ótima é a água”? Analisando, desta forma, as contribuições do referido conto de Primo Levi para os processos de ensino e de aprendizagem. Para tanto, utilizou-se o conto, questionamentos constituídos por questões abertas e um experimento de caráter investigativo que se configuraram em instrumentos de coleta de dados. O estudo possibilitou discussões significativas a respeito da utilização e contribuições do conto empregado como ferramenta problematizadora para a construção de conhecimentos. Entre as discussões, destaca-se a importância de metodologias que possibilitem reflexões acerca de concepções dos estudantes, como a de que os conceitos de viscosidade e densidade são similares. Além disso, reflexões sobre problemas ambientais e o próprio conceito de viscosidade foram pontos significativos apontados na pesquisa.

This article presents results of a qualitative research carried out with high school students from a Public School in the city of Maringá-PR, in order to answer the question: what pedagogical potentials, in the viscosity learning concept, has been revealed by the "Great is water" tale? Therefore, analyzing the contributions of this tale written by Primo Levi to the teaching and learning processes. For this purpose, it was used the tale, questions composed of open questions and an investigative experiment that will configure data collection instruments. The study allowed meaningful discussions regarding the use and contributions of the tale undertaken as a problematic tool for knowledge construction. In the discussions, it is highlighted the importance of methodologies that make reflections about the conceptions of the students on the similarity of concepts like viscosity and density possible. Furthermore, reflections about environmental problems and the concept of viscosity were significant points featured in the research. [ABSTRACT FROM AUTHOR]

The main objective of this research study is to perform a thermographic analysis of a spark ignition engine by inducing controlled failures not detected by OBD II (Second Generation On-Board Diagnostic System) and by using a design of experiments (DoE). A full factorial design of two levels and two factors is applied. The experimental unit is a Hyundai Accent vehicle that is subjected to eight treatments in a dynamometric bench. The results show a temperature variation of 18.78 °C and a NOx of 291 ppm when altering the spark plug and 18.98 °C and a NOx of 20 ppm when modifying air filters. The results of combining both failures simultaneously are 55 °C and a NOx of 25 ppm. It is concluded that the quadratic mean (RMS) of a thermographic profile is the feature that best serves to assess vehicle failure factors and consequences since it provides an improved adjustment and a reduced standard deviation. [ABSTRACT FROM AUTHOR]

Many studies have addressed the effects of the continuous presentation of ideal female beauty by the media and, especially, advertising. Multiple theories have attempted to identify the main mechanisms that cause the detrimental effects of exposure to such an idealized female image in advertising content. However, most such evidence has been correlational, whereas experimental evidence is very limited. Moreover, the impact of minimal exposure to such content has not yet been studied in detail. This experimental study investigates the short-term impact of reduced exposure (by viewing three beauty stereotype-related advertisements) on psychological well-being, body satisfaction, and the possible emergence of weight control behaviors in young women. The results reveal that even such brief exposure was sufficient to negatively influence the emotional well-being of the participants, who reported feeling more uncomfortable, insecure, anxious, and frustrated than women assigned to the control condition. The results of this experimental study thus reveal that advertising can influence the mood and behaviors of young women. In turn, they also reported greater intention to engage in weight and calorie control behaviors. Likewise, a mediation analysis revealed that the effect of such representations of female beauty on weight control behaviors was mediated by the decrease in the emotional well-being of the participants. The social and media implications of this work are discussed. [ABSTRACT FROM AUTHOR]

Devido ao cenário de pandemia atribuído ao surgimento do novo Coronavírus e ao distanciamento social adotado para minimizar sua circulação e transmissão, o ensino remoto tornou-se uma realidade na área da educação. Trabalhar de forma remota gerou a necessidade de diversas adaptações no processo de ensino e aprendizagem, tornando-se ainda mais desafiador na área da Ciência, onde professores e alunos utilizam de atividades experimentais para desenvolver maior estímulo, interesse e aprendizado, caracterizando-se como um forte aliado nas metodologias de ensino. Diante do exposto, este artigo apresenta a descrição de experimentos e sua relação com os conteúdos da disciplina de Química Geral do curso de Ciências da Natureza durante período de ensino remoto, os quais foram realizados pelos alunos a partir da adaptação de materiais e orientação do professor. Todos os experimentos foram construídos pelos estudantes em suas residências, além disso, os mesmos fizeram a gravação das etapas experimentais com as devidas explicações e seus vídeos foram então enviados para o docente para avaliação. Com base no aproveitamento dos alunos na disciplina, bem como, relatos dos estudantes a respeito da metodologia empregada, considera-se que o trabalho foi bastante exitoso.

This experimental study aimed at verifying if the disclosure of the Integrated Report (IR) by an organization influences investors' judgment and decision-making. With a simple experimental design, the dependent variable consists of the participants' judgment and decision-making on a scale from -5 to 5. The independent variable has two levels: one using a set of traditional accounting reports and the other adding the IR. The sample consisted of students from the Accounting Sciences, Administration and Economic Sciences courses at a public university in the state of Paraná. The analysis was performed using descriptive statistics and the t-test. With 269 valid results, it was inferred that the IR exerts a positive influence on investors' judgment and decision-making. This result contributes to the literature by providing empirical data that corroborates the studies by Atkins and Maroun (2015) and Cheng et al. (2015); as a practical contribution, it provides evidence that the Integrated Report generates value for investors through the organization's sustainability information. As it is an incipient study in Brazil, there are limitations regarding statistical techniques, which provide opportunities for continuity of the work and creation of a disciplinary field in terms of research involving IR and decision-making. [ABSTRACT FROM AUTHOR]

Copyright of Diversitas Journal is the property of Diversitas Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Currently, technological tools are replacing traditional methods in many fields of psychology, a phenomenon of high impact; For this reason, validity and reliability characteristics analysis of computerized experimental tests were carried out, using an instrumental psychometric study, which had 267 participants who took part of 589 paired applications of tests. Through a discriminant analysis, four computerized PEBL tests and three computerized Wundt's Lab tests were identified, consistent with validated cognitive measures, as opposed to three PEBL tests and four Wundt's Lab tests, which did not show such evidence. Additionally, convergences were found between PEBL and Wundt's Lab's Mental Rotation test performances, as well as paired associations between verbal and visuospatial working memory, attention and movement perception test performances. Finally, relevant associations were shown between the results of the participants in the tests and the variable sex. Results support the existence of psychometric characteristics in seven computerized tests, making their use relevant in various fields of cognitive evaluation. [ABSTRACT FROM AUTHOR]

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Esta investigación pretende acercarse al aprendizaje desde los pilares de Delors en un espacio tan específico como el laboratorio de ciencias, así como a la aplicación del concepto de la transposición didáctica de Chevallard. Para ello, se acerca a la utilización de la metodología activa: microenseñanza. El planteamiento de esta microdocencia se orienta a introducir los conocimientos científicos y mostrarlos mediante experimentos al resto del grupo clase. Por ello, la finalidad de esta investigación radicó en describir desde el punto de vista del alumnado las vivencias de esta metodología y las ventajas que supone esta metodología más participativa. La manera como se hizo la recolección y posterior análisis de la información siguió una metodología no experimental solo pos-pos-prueba con grupo no equivalente y único, siendo la población invitada el alumnado de segundo A del grado de educación infantil en la Universidade da Coruña. Entre los resultados, destacamos el elevado grado de aceptación de la metodología y cómo esta ha conseguido aumentar el grado de aceptación inicial hacia las ciencias naturales. Entre las conclusiones, cabe destacar que la metodología resultó acertada en su aplicación porque así lo mostraron las alumnas en sus respuestas, así como también por el aumento en el acercamiento a las ciencias y adquisición de los distintos saberes.

Objective/Context: What effect do the emotions conveyed by the candidates have on the voters? In electoral campaigns, candidates not only inform voters of their positions in public policies or the political party they represent; they also convey emotions. In this work, we investigate the effect that these emotions have on voting. Methodology: Two survey experiments were designed and fielded to a representative sample of the population residing in Chile during May and June 2019. These experiments allow us to evaluate how the emotions transmitted by the candidates, through their faces and political speech, can affect the preference for a candidate. Conclusions: The results show that the valence of emotions is a relevant factor in voting decisions, particularly when transmitted through facial expressions. Positive emotions increase the probability of voting for a candidate. When we consider the emotions conveyed through speech, we find that positive emotion about the future increases the likelihood of voting for that candidate. Originality: This work makes two contributions. On the one hand, it contributes to the study of the impact of emotions in Latin America. On the other hand, the use of experiments allows evaluating the effect of the emotions transmitted by the candidates. [ABSTRACT FROM AUTHOR]

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Artigos científicos que adotem o método experimental na área contábil, no Brasil, são pouco frequentes. No campo da educação contábil são menos frequentes ainda. Nesse sentido, o objetivo do estudo foi descrever, a partir de revisão narrativa de literatura especificamente selecionada, estudos nacionais e internacionais no campo da educação contábil que utilizaram método experimental e quase-experimental e, adicionalmente, apresentar oportunidades de pesquisas nesse campo com o uso do método. Metodologicamente o estudo tem caráter bibliográfico. Após procedimentos de levantamentos junto a revistas contábeis, obtiveram-se 7 artigos nacionais e 76 internacionais, cuja metodologia usada foi experimento ou quase experimento. Como resultados percebeu-se que os objetivos dos estudos, nacionais e internacionais, são semelhantes, com foco na verificação de efeitos de diferentes metodologias sobre o desempenho e satisfação dos estudantes. Entretanto, a principal diferença reside na quantidade, que por ser superior no contexto internacional, resulta em maior variedade de temas estudados. A principal contribuição do estudo é no sentido de demonstrar oportunidades do uso de experimentos para a promoção de melhorias em práticas de ensino, de aprendizagem, de formação de professores e em políticas institucionais.

Scientific studies that adopt the experimental method in the accounting area, in brazil, are uncommon. In the field of accounting education, they are even less frequent. In this sense, the aim of the study was to describe, based on a narrative review of the specifically selected literature, national and international studies in the field of accounting education using an experimental and quasi-experimental method and, additionally, to present research opportunities in this field with the use of the method. Methodologically, the study has a bibliographic character. After surveying procedures with accounting journals, 7 national and 76 international papers were obtained, whose methodology used was experiment or quasi-experiment. As a result, the objectives of the studies, national and international, are similar, with a focus on verifying the effects of different methodologies on student performance and satisfaction. However, the main difference lies in the number of studies, which was higher in the international context, and resulted in a wide array of topics studied. The main contribution of the study is to demonstrate opportunities for using experiments to promote improvements in teaching, learning, professor training and institutional policies. [ABSTRACT FROM AUTHOR]

Neste artigo relata-se um estudo que buscou compreender em que medida a participação de estudantes da graduação como mediadores nas diversas atividades de um projeto extensionista da Universidade Federal do Espírito Santo (UFES), o Show de Física, impactou em seus respectivos processos formativos. Trata-se de um projeto de extensão universitária que tem o objetivo de despertar o interesse e a curiosidade dos estudantes e promover a divulgação da ciência Física. Entende-se essa pesquisa como sendo de cunho qualitativo e de caráter exploratório. Para a produção dos dados, os mediadores que participaram da atividade extensionista foram convidados a narrar suas experiências no Show de Física. A partir do retorno de 21 participantes, utilizou-se os pressupostos da Análise Textual Discursiva para interpretar as contribuições dessa atividade para o desenvolvimento pessoal, profissional e acadêmico desses graduandos. Os resultados apontam aprendizagens do ponto de vista atitudinal (como a importância do trabalho em equipe e das relações interpessoais), profissional (domínio do conteúdo subjacente aos experimentos e a criação e valorização de uma identidade profissional), de enculturação acadêmica (como o desenvolvimento da escrita acadêmica, a coleta e análise de dados e a participação em congressos) e ainda uma satisfação pessoal em participar do projeto Show de Física. Palavras-chave: Divulgação Científica; Experimentos; Atividade Extensionista; Aprendizagens Atitudinal e Profissional Physics Show: contributions to personal, academic and professional formation of mediators Abstract: This article reports a study aimed at understanding to what extent the participation of undergraduate students as mediators in the various activities of the extension project “The Physics Show” at the Federal University of Espírito Santo (UFES), impacted their respective formative processes. It is a university extension project that aims to arouse the interest and curiosity of students and promote the dissemination of physical science. This research was qualitative and exploratory. For the obtaining data, the mediators who participated in the extension activity were invited to narrate their experiences at the Physics Show. The assumptions of Textual Discursive Analysis were used to interpret the contributions to professional and academic development, from the response of 21 participants to the survey. The results suggested learning from an attitudinal point of view (such as the importance of teamwork, interpersonal relationships), professional (mastery of the content underlying the experiments, and the creation and valorization of professional identity), academic enculturation (such as the development of academic writing, data collection and analysis, participation in congresses), and personal satisfaction in participating in the Physics Show Project. Keywords: Scientific Divulgation; Experiments; Extension Activity; Attitudinal and Professional Learning

En este artículo se presenta un estudio experimental del comportamiento de fragmentación de muestras naturales del volcán Popocatépetl en un tubo de choque. Estos experimentos simulan explosiones Vulcanianas como las que han ocurrido en el volcán Popocatépetl desde su reactivación en 1994. Aquí detallamos el comportamiento de varios parámetros incluyendo la presión umbral de fragmentación, rapidez de fragmentación, velocidad de emisión y eficiencia de fragmentación. Nuestros resultados indican que la porosidad interconectada de la roca y la presión aplicada ejercen una fuerte influencia en el proceso de fragmentación. Los valores de la presión umbral de fragmentación que se presentan aquí proporcionan estimaciones cuantitativas de la sobrepresión requerida para generar una explosión en el volcán Popocatépetl. A sí mismo, presentamos las primeras estimaciones de la rapidez de fragmentación a temperaturas magmáticas. La eficiencia de fragmentación de los piroclastos generados experimentalmente es evaluada a través de la teoría fractal de fragmentación y observamos que su granulometría puede ser influenciada significativamente por la composición y la textura de la matriz. La granulometría de depósitos de caía asociados a diferentes eventos explosivos del volcán Popocatépetl también muestran un comportamiento fractal, pero con dimensiones fractales mayores a las correspondientes a las partículas generadas experimentalmente, lo cual es consistente con la ocurrencia de procesos de fragmentación secundarios durante las erupciones. Finalmente, presentamos información extraída de señales elastoacústicas asociadas con los procesos de fragmentación. El análisis de los resultados experimentales que se presentan aquí son útiles para calibrar modelos eruptivos e interpretar datos de monitoreo de las erupciones de volcanes con composición intermedia y de este modo contribuyen al mejoramiento de la evaluación del peligro de estos riesgosos volcanes. doi: https://doi.org/10.22201/igeof.00167169p.2019.58.1.2066

Con el objetivo de evaluar el efecto de ME-UCf, biopreparado a base de microorganismos eficientes sobre la producción de posturas y fase de campo en fruta bomba (Carica papaya L.), se desarrolló este trabajo, en la finca La Loma, municipio Cienfuegos, durante el periodo de enero a mayo del 2018. Como material biológico se utilizaron semilla certificada de fruta bomba Maradol Roja y ME-UCf, biopreparado a base de microorganismos eficientes, obtenido en la Universidad de Cienfuegos a partir de su extracción de bosques primarios de la provincia. En el experimento 1 se estudiaron dos dosis de ME-UCf (200 y 240 mL.L-1) y un testigo sin aplicación, en la fase de vivero. Se evaluó semanalmente altura de la planta, diámetro del tallo y número de hojas de las posturas hasta los 42 días de emergidas, mediante un diseño de bloque al azar con 50 réplicas por tratamiento. Se determinó la rentabilidad para esta fase. Al concluir el trabajo, se obtuvo que el tratamiento 2 (ME-UCf a 200 mL.L-1), alcanzó los mejores resultados y resultó el más rentable. En el experimento 2 se estudiaron en campo, dos dosis de ME-UCf (40 y 48 %) y un testigo sin aplicación hasta los 27 días del trasplante. Se evaluó altura de la planta, diámetro del tallo y número de hojas a los 20 y 27 días, mediante un diseño de bloque al azar con 8 réplicas por tratamiento. Al concluir el experimento, el tratamiento 2 (ME-UCf al 40 %), alcanzó los mejores resultados.

Una dimensión, en un almacén de datos, es un concepto abstracto que agrupa datos que comparten un significado semántico común. Las dimensiones se modelan mediante un esquema jerárquico de categorías. Una dimensión es llamada estricta si cada elemento de cada categoría tiene exactamente un ancestro en cada categoría superior, y homogénea si cada elemento de una categoría tiene por lo menos un ancestro en cada categoría superior. Si una dimensión es estricta y homogénea se pueden utilizar consultas pre-computadas en los niveles inferiores para obtener respuestas en los niveles superiores. Sin embargo, cuando las dimensiones no son estrictas/homogéneas debemos conocer sus restricciones para obtener un resultado correcto. En el mundo real, las dimensiones pueden no satisfacer estas restricciones, y en estos casos, es importante corregir estas dimensiones o encontrar formas de obtener respuestas correctas a las preguntas planteadas en las dimensiones inconsistentes. Una reparación minimal es una nueva dimensión que satisface las restricciones estrictas y homogéneas, y que se obtiene a partir de la dimensión original a través de un número mínimo de cambios, la cual tiene un costo computacional NP-duro. Para mejorar esto, se define la dimensión extendida y se propone la reparación compatible que obtiene una nueva dimensión consistente, manteniendo la esencia de la dimensión original. En este último punto se centra la experimentación, elaborando y evaluando un programa que genere esta reparación compatible y obtenga resultados en tiempo polinomial.

This paper holds that the standard economic accounts of corruption based on expected costs and benefits are insufficient to understand and to tackle dishonesty in the real world. It embarks on a survey of the literature to discuss the major roles automatic judgments and decisions, as well as cognitive biases and social preferences might play in deviations from honest behavior. The paper further discusses the implications of behavioral economics to the debate over how to fight corruption and foster integrity. [ABSTRACT FROM AUTHOR]

The Rawlsian veil of ignorance should induce agents to behave fairly in a distributive context. This work tried to re-propose, through a dictator game with giving and taking options, a sort of original position in which reasoning behind the veil should have constituted a moral cue for subjects involved in the distribution of a common output with unequal means of production. However, our experimental context would unwittingly recall more the Hobbesian state of nature than the Rawlsian original position, showing that the heuristic resource to the Rawlsian idea of a choice behind the veil is inefficacious in distributive contexts. [ABSTRACT FROM AUTHOR]

O presente texto interroga a noção de experimentos. Deslocando a atenção do debate sobre sexo e heteronormatividade para relacionalidades entre humanos e não/humanos, insere-se numa imaginação fabulativa queer voltada às ontologias variáveis do contemporâneo que não podem ser homogeneizadas por um decretado fim das dicotomias. São apresentadas notas sobre experimentos em dança e psicologia social que se configuram como apontamentos iniciais de um programa de pesquisa em andamento.