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problem extraction » problem interaccion (Expander búsqueda), protein extraction (Expander búsqueda)
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problem extraction » problem interaccion (Expander búsqueda), protein extraction (Expander búsqueda)
extraction process » construction process (Expander búsqueda)
1
artículo
Olive leaves are residues from pruning and harvesting and are considered an environmental management problems. Interestingly, these residues contain high polyphenol concentrations, which can be used to treat chronic diseases. However, these compounds are a technological challenge due to their thermolability and reactivity during extraction. Thus, this study assessed the use of pressurized liquid extraction (PLE) with green solvents like water-ethanol and water-glycerol mixtures (0–15%) at 50 °C and 70 °C to yield polyphenol-rich antioxidant extracts with reduced glucose and fructose content. The use of 30% ethanol at 70°C presented the highest polyphenol content (15.29 mg gallic acid equivalent/g dry weight) and antioxidant capacity, which was expressed as IC50 (half maximal inhibitory concentration): 5.49 mg/mL and oxygen radical absorbance capacity (ORAC): 1259 μmol Trolox equiva...
2
artículo
Olive leaves are residues from pruning and harvesting and are considered an environmental management problems. Interestingly, these residues contain high polyphenol concentrations, which can be used to treat chronic diseases. However, these compounds are a technological challenge due to their thermolability and reactivity during extraction. Thus, this study assessed the use of pressurized liquid extraction (PLE) with green solvents like water-ethanol and water-glycerol mixtures (0–15%) at 50 °C and 70 °C to yield polyphenol-rich antioxidant extracts with reduced glucose and fructose content. The use of 30% ethanol at 70°C presented the highest polyphenol content (15.29 mg gallic acid equivalent/g dry weight) and antioxidant capacity, which was expressed as IC50 (half maximal inhibitory concentration): 5.49 mg/mL and oxygen radical absorbance capacity (ORAC): 1259 μmol Trolox equiva...
3
artículo
Publicado 2022
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This study aimed to analyze the effect of problem-based learning on metacognitive abilities in the conjecturing process of junior high school students. To reach this purpose, a mixed-methods design, which is a combination of quantitative and qualitative methods, was used. +e quantitative method was used to analyze the metacognitive abilities of the students’ conjecturing process, while the qualitative method was used to explore observation and interview data. +e subjects of this study consisted of 60 eighthgrade students. Two learning models were compared, namely the problem-based learning model and the conventional learning model. +e metacognitive abilities of students’ conjecturing process were measured by a pattern generalization problem-solving test. After collecting the data and analyzing them through the independent-samples t-test, it was revealed that the PBL had a significant...
4
tesis de grado
Publicado 2017
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The present study details the evaluation, analysis and improvement of problem management by applying the ITIL methodology, specifically to the problematic of the problem management processes of the Multi Vendor Services area in IBM Peru and the proposal to improve the current management, the which presents difficulties with the excessive times of solution of problems and increase of operating costs. To carry out the improvement, a sample of 52 records of tickets from a population of 185 corresponding to 120 days was obtained, under which the tests were carried out. The type of study used is of the experimental - applied type and the design is of a pre - experimental type since it is going to perform a test before and test after the improvement. The results were obtained; for the first indicator, the average problem solution time before the improvement was 18.5 hours and after the improve...
5
objeto de conferencia
Publicado 2013
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Proceedings from the Fab 9 Research Stream 9th International Fablab Conference, 21-27 July 2013, Yokohama.
6
artículo
Publicado 2018
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Geo-referenced textual data has been the subject of multiple investigations, by providing opportunities to better understand certain phenomena according to the content that is shared, either on-line such as social networks, blogs, and news; or through repositories such as scientific research articles, geo-referenced virtual books, among others. However, the characteristics of this information are studied, analyzed and processed separately, either through its textual components or its geo-spatial components, which offers a separate understanding of the results. In this paper, we propose an integration of textual and geo-spatial components from the pre-processing phase to the visualization stage, As a part of the Document Mapping process based on the phases of the Knowledge Discovery in Databases (KDD). Achieving two main results (1) minimize the problems that arise in the visual phase, su...
7
artículo
Publicado 1985
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This article has the dual purpose of explaining the nature of the energy crisis in Peru and of contributing towards placing the actual debate on this matter in perspective. To that effect, the author proposes the use of three basic principies in the fleld of energy economics which, according to his judgment, are essential both for the study of the problem as well as for establishing rational criterio for the decision making process. In the light of such principies, the problem-crisis of oil reserves is examined and the succesive stages needed to reach a solution are analyzed. So, answers are sought for questions such as: should domestic production be geared to domestic energy demand or to the needs to generate foreign exchange?, what are the ways and conditions that should norm the process of oil extraction, i.e., how should the revenues generated by the production of oil be distributed ...
8
artículo
Publicado 2018
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Expert opinion is a technique used in different areas of scientific research, which, in some way, guarantees its social and methodological validity. This method is also used as an instrument to make long-term predictions, with different types of solutions to obtain a concise answer that is achieved with the help of experts who exchange information, cultures and experiences to provide solutions to the relevant and timely problems that may arise. The purpose of this article is to review the quality literature regarding experts' opinion of different applications. This research resulted in an extensive relationship with the topics of technology, technology foresight, and especially education.
9
tesis de grado
Publicado 2014
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En los orígenes de la ciencia de la computación todo el énfasis estuvo puesto en desarrollar sistemas que automatizaran tareas que se hacían manualmente. Este era suficiente desafío. En la actualidad, se han automatizado muchas tareas y el gran desafío es cómo mejorar la capacidad de los sistemas para alcanzar nuevos requerimientos: agregar nuevas interfaces, combinar múltiples fuentes de datos en una sola, interactuar con dispositivos móviles y reemplazar viejas aplicaciones con nuevas. La tendencia de hoy es hacia un paradigma orientado a los procesos, donde las aplicaciones cubren la actividad global de la empresa y las herramientas son los BPMS (Business Process Management Systems o Sistemas de Gestión de Procesos de Negocio). Los modelos actuales resultan insuficientes porque son pobres en su integración y se orientan a describir datos y transacciones. El cambio de enfoqu...
10
artículo
Publicado 2023
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In this work, a torque controller for a variable rotational speed wind turbine has been modelled using Reinforcement Learning and considering the Optimal Torque - Maximum Power Point Tracking problem as one of optimization. The reward optimization function is designed as a non-linear function depending mainly on the rotor power variation. Based on this, an optimal action (electromagnetic torque variation) regulates the turbine rotational speed. A simulated 1.5 MW three bladed wind turbine operation is managed by the torque controller. It keeps the turbine working at optimal operational conditions after a successful training process, which is carried out using the Proximal Policy Optimization algorithm. For the controller training, the turbine confronts constant and then randomly staggered wind speed behaviour. Time series of rotor angular speed, torque and power are presented. Our result...
11
tesis de grado
Publicado 2025
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La problemática observada en el almacén de una empresa de autopartes son los altos tiempos en el proceso de preparación de pedidos debido a la falta de herramientas de mejora continua en el proceso mismo. El objetivo de esta investigación es proponer un modelo de gestión del proceso de picking para reducir los tiempos en la atención de pedidos mediante la herramienta 5´S. Para ello, se realizó un estudio empírico con alcance cuasi experimental y post positivista, bajo la modalidad de estudio de caso. Se evidenció la diferencia en el tiempo de preparación dependiendo del tipo de trabajador en el almacén, y mediante la aplicación de las 5´S y estandarización de trabajo se logró una reducción significativa en el tiempo de picking del 41,37% en el caso de los nuevos operadores, del 32,80% para un operador estándar y del 11,82% para los operadores experimentados.
12
tesis de grado
The problem posed in this investigation is that a mutual fund management company maintained traditional processes of subscription and redemption of quotas in the funds, which caused great economic inefficiencies and discontent among clients. That is why the objective of this research was to propose a proposal to improve customer service processes through the application of a digital transformation through agile methodologies such as Design Thinking and Lean Startup through quasi-experimental practical research. In this way, it was possible to increase profits and customer experience. After the implementation, it was evidenced that thanks to this, the number of AUMs and participants increased by +15% per month and +55%, since the implementation, respectively, translating, later, into higher profits for the company (+10%).
13
tesis de maestría
The thesis has two purposes: The first one is to build a mathematical model that better approximates (with respect to the mathematical model in [2]) to the behaviour of the wine fermentation process with the addition of certain amount of nitrogen at some instant of time, based in [2]. This mathematical model is described by mean ordinary differential equations including some parameters which will be identified solving some optimization problems. The second purpose of the thesis is to study the improved model but introducing some control variables in order to stabilize in an appropriated sense the corresponding dynamical system of the new model. This is a kind of MIMO nonlinear system control problems and will be solved using the tools in [6].
14
artículo
Publicado 2010
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This paper discusses the pricing of arithmetic Asian options when the underlying stock follows the constant elasticity of variance (CEV) process. We build a binomial tree method to estimate the CEV process and use it to price arithmetic Asian options. We find that the binomial tree method for the lognormal case can effectively solve the computational problems arising from the inherent complexities of arithmetic Asian options when the stock price follows CEV process. We present numerical results to demonstrate the validity and the convergence of the approach for the different parameter values set in CEV process.
15
artículo
Publicado 2023
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Machine learning is a branch of artificial intelligence that uses scientific computing, mathematics and statistics through automated techniques to solve problems based on classification, regression and clustering. Social demand refers to the need for service and product of the professional training process, expressed by interest groups, aimed at contributing to national development, as established by the quality assurance policy of university higher education and national licensing and accreditation models. In this context, this paper conducts research based on job positions of IT professionals posted n web portals, designs a machine learning process with an unsupervised approach, extracts occupational profiles, designs a multidimensional model, applies k-means clustering when determining clusters of job positions by similarity, and reports the results obtained.
16
documento de trabajo
In the case of food in favor of a child and teenager, states in Article 93 1, that while parents have both the duty to provide food for their children, this obligation, in case of absence or ignorance of the whereabouts of the parents , Could be assumed by older siblings, grandparents, collateral relatives up to the third degree or other responsible of the child and adolescent, in that sense the strictly stated articles indicate that the members of the family understood this as those people united by emerging legal links a intersex relationship, procreation and kinship according to the statement by Dr. Alex Placido 2 , - are to be owed each other, but in the Peruvian reality, food processing is not meeting Its aims that the rule has established since in practice we find many problems to be effective collection among these we have the bureaucracy, speed, form and way of enforcing complian...
17
artículo
Publicado 2024
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The underrepresentation of women in STEM fields needs to be highlighted through data to assist decisionmakers and public policy creators in addressing the issue effectively. However, the lack of structured, organized data published openly in this domain is still a reality. To address this problem, a Latin American research network called ELLAS was created. The project’s goal is to develop a platform with Semantic Web-based technologies to structure and concentrate data from Brazil, Peru, and Bolivia, initially. This paper presents the processes defined for the collection and curation of both unstructured and structured data, sourced from scientific articles, social networks, and existing open data. We explore the architecture design in a way that facilitates understanding of the details of the processes and the actors involved for each data source. We present the preliminary results fr...
18
artículo
Publicado 2022
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Language for a long time is an indispensable tool for society, since it allows communication and interaction between people. Learning sign language is a very big problem, either because access to information is scarce, there are no interpreters of this language or because learning of this language is not taught from an early age. This document shows the development of a mobile application with augmented reality following the mobile methodology and determining the influence it has on the Peruvian sign language learning process, with a sample of 30 students as a control group and an experimental group. It started with a performance percentage of 23 percent and using the mobile application significantly improved the performance of the sign language student by 65 percent.
19
artículo
Publicado 2022
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Language for a long time is an indispensable tool for society, since it allows communication and interaction between people. Learning sign language is a very big problem, either because access to information is scarce, there are no interpreters of this language or because learning of this language is not taught from an early age. This document shows the development of a mobile application with augmented reality following the mobile methodology and determining the influence it has on the Peruvian sign language learning process, with a sample of 30 students as a control group and an experimental group. It started with a performance percentage of 23 percent and using the mobile application significantly improved the performance of the sign language student by 65 percent.
20
tesis de grado
Publicado 2023
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Latin America suffers from a major problem of loss of Amazonian Forest cover, thus making Peru one of the ten most diverse countries on the planet where most of our biological diversity is found in forests and these provide us with various ecosystem services and play a very important in nature. To calculate forest loss, the database of the "Geoforests" platform of the PNCBMCC (National Forest Conservation Program for Climate Change Mitigation) of the Ministry of the Environment was obtained, where Landsat-TM, Landsat- ETM+ and Landsat-OLI during the periods 2001-2020. Based on the evidence, it is concluded that the Peruvian Amazon Forest, over the years, has increased hectares of loss and fragmentation of dangerous forests, predicting that by 2030 there will be almost 4 million hectares lost according to the average of annual growth, being the main causes of agriculture, illegal mining a...
