Medium dependence of asphaltene agglomeration inhibitor efficiency

Applying chemical additives (molecule inhibitors or dispersants) is one of the common ways to control asphaltene agglomeration and precipitation. However, it is not clear why at some conditions the synthetic flocculation inhibitors as well as resins not only do not inhibit the asphaltene agglomeration,, they may also promote it, and why the increasing of the additive concentration may lead to the diminishing of their efficacy. To clarify this issue, in the present work we have performed a set of vapor preassure osmometry experiments investigating the asphaltene agglomeration inhibition by commercial and new inhibitor molecules in toluene and o-diclorobenzene. Monte Carlo computer modeling has been applied to interpret some unexpected trends of molar mass of the Puerto Ceiba asphaltene clusters at different concentrations of inhibitor, assuming that inhibitors efficiency is directly related to their adsorption on the surface of asphaltene or its complexes. It has been found that a self-assembly of inhibitor molecules, induced by relative lyophilic or lyophobic interactions, may be a reason of the inhibitor efficacy declining.Comment: 21 page

Extrapolation in the reading comprehension process in engineering students

The purpose of this research was to analyze the processes that allow students to develop reading comprehension through extrapolation. A mixed methodology was used, where through the descriptive correlational analysis between the study variables and the qualitative one that allowed describing and explaining the pedagogical processes carried out. Regarding the quantitative method, a purposive sample of 220 students from the engineering area of a public university in Lima, Peru, whose ages ranged from 16 to 20 years old, of both genders, was used. For the qualitative analysis, eight students were randomly selected. The results showed that the dimensions referring to reading comprehension had an average value of 53% and the correlational analysis indicated a positive and regular average relationship between reading comprehension and extrapolation (Spearman's rho = .394). It was concluded that the use of extrapolation for the development of reading comprehension has been positive, reaching significant levels

La extrapolación en el proceso de comprensión lectora en estudiantes de Estudios Generales del Área de Ingeniería de la UNMSM-2020

La investigación titulada la extrapolación en el proceso de comprensión lectora en estudiantes de Estudios Generales del Área de Ingeniería de la UNMSM-2020, tuvo por finalidad analizar los procesos que permiten a los estudiantes desarrollar la comprensión lectora a través de la extrapolación, para lo cual se empleó una metodología mixta, donde a través de del análisis descriptivo correlacional entre las variables de estudio y el cualitativo que permitió describir y explicar los procesos pedagógicos realizados para que un muestra determinada de estudiantes alcancen los niveles de extrapolación para el desarrollo de la comprensión lectora. Para el método cuantitativo se empleó una muestra intencionada de 220 y para el análisis cualitativo se seleccionó a ocho estudiantes. Los resultados explican que el empleo de la extrapolación para el desarrollo de la comprensión lectora ha sido positivo, alcanzando niveles significativos

Estrategias didácticas del docente para mejorar la comprensión lectora en estudiantes de la especialidad de lenguaje, literatura y comunicaciones en la Facultad de Educación UNMSM

El documento digital no refiere un asesorPublicación a texto completo no autorizada por el autorAnaliza la relación existente entre las estrategias didácticas del docente y la comprensión lectora en estudiantes de la Facultad de Educación del primer semestre de la Universidad Nacional Mayor de San Marcos - 2016. La presente investigación contribuye a la solución de la problemática sobre el desarrollo de las habilidades lingüísticas, la misma que se evidencia en un nivel complejo y desfavorable para desarrollar los estudios en el nivel de educación superior; por ello, con la presente tesis se formula sugerencias para contribuir a que los docentes universitarios en su labor educativa diaria empleen diversas estrategias didácticas y posibilitar habilidades lingüísticas en sus estudiantes, en particular con la comprensión lectora.Tesi

Application of Multifunctional Agents During Enhanced Oil Recovery

During the application of enhanced oil recovery (EOR) processes, complex operational issues, such as the deposition of organic compounds (i.e., wax, resins, and asphaltenes, among others), reservoir formation damage, rock wettability alteration, and high fluids viscosity negatively affect oil recovery. This chapter presents the experimental evaluation of the multifunctional properties of two novel chemical agents recently developed: a zwitterionic surfactant (ZS) and a supramolecular complex (named here as AMESUS) for chemical EOR applications. The performance of the new multifunctional agents and the mechanisms in play on the removal/control of organic compounds deposition oil recovery, asphaltenes inhibition-dispersion activity, reduction in heavy crude oil viscosity, rock wettability modification, and relative permeability are discussed in this chapter

Competency-Based Curriculum Planning Model To Overcome Inconsistencies In Vocational Training

"The objective of the research was to evaluate the consistency of different training proposals, proposing as a reference a competency-based curriculum planning model. Qualitative methodology was used from an interpretive paradigm, making use of inductive and deductive analysis at the same time. Inductively, observations were generated through documentary analysis, interviews with experts, and a focus group with university professors, who then deductively derived interpretations and forecasts regarding curricular planning. As a result, it was obtained that the designed model, based on the triangulation of the information collected, allowed evaluating and determining the strengths and weaknesses of the priority elements of the university curriculum: the graduation profile, the study plan and the evaluation system. The main conclusion was that it is necessary to have clear parameters for specifying the university curriculum, through a referential model that allows the development of a virtuous circle of evaluation and continuous improvement of curricular planning.Keywords: -competencies; curriculum planning; consistency; discharge profile; Curriculum; evaluation systemINTRODUCTIONThe Bologna agreement signed by the European Union led to great transformations in the training processes of future professionals. One of these was that the university curriculum presents competencies to develop for the exercise of a certain career 18 . According to the Tuning Project for Latin America 45 , competencies are classified by their basic, transversal or specific nature. Basic skills allow people to function as individuals who are part of society and support the development of more complex skillsof analysis, synthesis, understanding and action, thanks to the cognitive skills of information processing, argumentation and interpretation 44 accompanied by of central aspects.Transversal, generic or soft skills are common to different professions, and increase performance expertise, employability, management and productivity in different work environments 8,14, 19,26,44 . The specific competencies are those specific to each profession, and establish the performance expected in each of the professional disciplines, which promote specialization, thanks to the development of specific training processes 2, 20, 39,44 .Another transformation was the management of curricular planningso that all the elements of the curriculum (profiles, objectives, competencies, contents, didactic strategies and evaluation strategies) converge harmoniously and, thus, achieve the graduation profile 11,38 . The design of a curricular planning by competencies must start by identifying the challenges and needs of each profession, this with the aim of contributing to the solution of the latent problems that society faces, for which the competencies to be trained for a suitable performance. All this with theaim of guaranteeing the articulation between the training proposal and the set of demands on the profession 6 .Based on the above, curricular planning is defined in a competency-based approach as the design process of each of the central components of the curriculum, taking into account the educational model of the university, which defines the fundamental orientations of training, as well as the environment of the profession, its demands and development trends.From this perspective, a Curriculum Planning Model for Competencies -hereinafter MPCC -becomes the reference for the construction, organization and readjustment of the competency-based training curriculum, which contains the description of the stages and processes that guarantee consistency, coherence, relevance and gradualness of the training process, likewise, it articulates the macro, meso and micro stages of curricular planning where the structure of each of its components is taken into account 3,24,25,41,50 .The fundamental elements of the MPCC are the graduate profile, the study plan and the evaluation system. The graduation profile is made up of the set of generic and specific competencies for performance in a certain profession, identified after

Research hotbeds: A practice for scientific development in universities

The study carried out seeks to explain how the seedbeds; they are part of the formative research program of the universities to fine-tune research methods, strengthen critical thinking; problem solving and promoting innovation. In this sense, the study was developed under the quantitative approach of cross-sectional scope; descriptive-correlational level; with the non-probabilistic-intentional sampling type. With the participation of 1116 university students of the formative research program. Obtaining as a result that the relevant point that the training sessions in the framework of the formative research showed to the research hotbeds is that they were related to the particular interest of the participants for an effective management of the bibliographic reference managers. There is an interest in accessing scientific databases; and optimally handle software such as Zotero, EndNote and Mendeley; in order to manage scientific information through storage, organization, managing citations and bibliographic references. Coming to the conclusion that the seedbeds represent in the formative research of the universities; a program to stimulate the development of research skills in students of various cycles through the development of courses related to research methodology, scientific writing, use of computer tools for managing references.Campus Ic

¿Cómo afecta la minería en el Guavio (Colombia)?

This article presents true and reliable information about mining in Colombia, particularly concerning Guavio, highlighting the problems generated by mining in that region, to raise awareness among Colombian and foreign mining companies. In the Guavio region, there is a great potential to extract construction materials and immensity of minerals, that is why there is a high level of mining activity. Likewise, there is a great variety of environmental and social problems, such as contamination of water bodies by solid waste, generating deviation in riverbeds, causing overflows and loss of land and crops. Finally, possible alternatives are analyzed to reduce the problems generated by mining in Guavio.Este artículo presenta información verídica y confiable sobre la minería en Colombia, particularmente respecto al Guavio, resaltando las problemáticas generadas por la minería en dicha región, con el fin de concientizar a las empresas mineras colombianas y extranjeras. En la región del Guavio se presenta un gran potencial para extraer materiales de construcción e inmensidad de minerales, es por esto que allí se presenta un alto nivel de actividad minera. Así mismo, se presentan una gran variedad de problemas ambientales y sociales, como contaminación de los cuerpos de agua por residuos sólidos, generando desviación en los cauces de los ríos, causando desbordamientos y pérdidas de terreno y cultivos. Finalmente, se analizan posibles alternativas para poder reducir las problemáticas generadas por la minería en el Guavio

El trabajo con las familias ante las drogas porteras con un enfoque de derechos

Los niños y adolescentes se encuentran expuestos al nivel familiar, tienen una diversidad de factores de riesgo y entre ellas se encuentran las drogas porteras. El tabaquismo, desde un enfoque de derecho debe tenerse en cuenta para atenuar esta situación en el marco de la familia. Este trabajo tiene como propósito describir la influencia familiar ante el tabaquismo y las consecuencias que acarrea desde el marco epidemiológico, legal y social