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1
artículo
The present study evaluated the removal of lignin from the rice husk, by means of steam explosion at different severity conditions. The process of lignin removal was evaluated as lignin Klason was performed in samples with pretreatment at pressures of 0.4; 0.6; 0.8 and 1.0 MPa, times of 6, 8, 10 and 12 minutes with a decompression of between 5 to 7 seconds; it is a lignin removal from 18.02 % up to 12.7 % at 1.0 MPa and 12 min compression, factor of 3.3 severity. The evaluation by FTIR of the husk without pretreatment, with pretreatment at 0.4 MPa and 12 min, 1.0 MPa and 12 min, shows a reduction in the transmission generated by the peaks corresponding to the presence of lignin -OH (2920 cm-1 ), CH and CO (1320 and 1360 cm-1), COC a (1060 cm-1) among others. The promover per screening electronic microscopy (SEM) showed the degree of introducción Sud cantidades of the surface of the rice...
2
artículo
Publicado 2020
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The research set out to awaken the interest of the academic community about the effects of the COVID-19 pandemic on the country’s university education through the analysis of social isolation and remote work. University education faces a new scenario: to surviving or undergo the pandemic, and remote learning becomes a new strategy for our students to continue their professional training. UNESCO indicates according to its calculations there are more than 1,500 million students in the world (and close to 10 million in Peru) confined to their homes due to the pandemic. Results show that university teachers are obviously not familiar with remote work or virtual learning environments. Finally, it is concluded that the university teacher has the possibility of turning the health threat generated by COVID-19 into an educational opportunity through remote interaction, despite social isolation,...
3
artículo
Education, in pandemic, underwent major transformations due to the rapid and unprepared move from face-to-face to remote teaching. New forms of communication were required to maintain student interest, motivation and participation in class. Therefore, the objective of the present research was to analyze the theoretical bases linked to nonverbal communication and remote education, based on a literature review, of 60 articles published in databases such as Scopus, Scielo, Dialnet, Google Scholar, conducted between the years 2020 and 2022, in the field of higher education, from which 26 were selected. The results show the need for greater teacher knowledge of the various aspects of non-verbal communication, through the computer, to avoid behaviors that constitute barriers to the teaching-learning process. Among the main conclusions is that nonverbal communication has a great influence...
4
artículo
Estimation of nitrogen content in sugarcane based on vegetation indices derived from Sentinel-2 data
Publicado 2025
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Sugarcane occupies a large territorial scale in the world and is constantly searching for mechanisms to monitor nutrients in the crop production cycle, using non-destructive methods. The study aimed to estimate the nitrogen content in the sugarcane leaf was developed in the 2021/2022 harvest on two commercial fields of dryland cultivars (RB867515 = 50.75 ha) and (CVSP7870 = 48.56 ha) at the Serranópolis-Goiás mill, evaluating the efficiency of the biochemical vegetation indices Fraction of Absorbed Photosynthetically Active Radiation (fAPAR) and Canopy Chlorophyll Content (CCC) processed using the radiation transfer model RTM PROSAIL, compared to the Normalized Difference Vegetation Index (NDVI) and Green Normalized Difference Vegetation Index (GNDVI), processed using mathematical band ratio models. Both were based on a time series of Sentinel-2 data as input variables. The validation ...
5
artículo
Publicado 2014
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Hookworms infection has become an increasingly serious threat to public health in Brazilian indigenous. Detection and/or clinical cases of hookworms have been reported in the past; however, nothing is known about the prevalence among indigenous Tapirapé in Brazil. We studied the presence of hookworms in indigenous Tapirapé ethnic group from county of Confresa, State of Mato Grosso, Brazil. Stool samples were collected from 542 members of the Tapirapé ethnic group and analyzed using formalin-ethyl ether and formalin-ethyl acetate sedimentation, and zinc sulfate flotation. Hookworms were detected in 104 (19.24%) indigenous and the prevalence was similar in males (21.29%) and females (17.20%). Males aged under 16 years were more frequently infected. Symptoms such as diarrhea and abdominal pains were reported from 104 infected individuals . Other symptoms associated with hookworms infecti...
6
artículo
Publicado 2020
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The passage from face to face teaching to distance learning, as a measure to face the COVID-19, brought about the need for the validation of the tests’ results taken in electronic format. It is considered that students are more likely to commit fraud in tests conducted remotely. The objective of the article is to present the study of the academic cheating as a report to the analysis of the psychometric validity of the tests. Through a bibliographic review, the concept of academic cheating and its types are analyzed. The main methods to detect it are presented, which can be used to ensure the validity of the results in synchronous tests, multiple choice type. The uses, potentialities and limitations of the methods used are described. Finally, the main challenges to overcome to validate the synchronous test’ results carried out remotely are presented.
7
artículo
Publicado 2020
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The passage from face to face teaching to distance learning, as a measure to face the COVID-19, brought about the need for the validation of the tests’ results taken in electronic format. It is considered that students are more likely to commit fraud in tests conducted remotely. The objective of the article is to present the study of the academic cheating as a report to the analysis of the psychometric validity of the tests. Through a bibliographic review, the concept of academic cheating and its types are analyzed. The main methods to detect it are presented, which can be used to ensure the validity of the results in synchronous tests, multiple choice type. The uses, potentialities and limitations of the methods used are described. Finally, the main challenges to overcome to validate the synchronous test’ results carried out remotely are presented.
8
artículo
Publicado 2020
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The passage from face to face teaching to distance learning, as a measure to face the COVID-19, brought about the need for the validation of the tests’ results taken in electronic format. It is considered that students are more likely to commit fraud in tests conducted remotely. The objective of the article is to present the study of the academic cheating as a report to the analysis of the psychometric validity of the tests. Through a bibliographic review, the concept of academic cheating and its types are analyzed. The main methods to detect it are presented, which can be used to ensure the validity of the results in synchronous tests, multiple choice type. The uses, potentialities and limitations of the methods used are described. Finally, the main challenges to overcome to validate the synchronous test’ results carried out remotely are presented.
9
artículo
The objective was to determine how remote education is related to the academic satisfaction of FCCSS UNFV 2020-1 students. The research was basic, with a descriptive scope or level and a non-experimental design. There was a population of 503 students with regular enrollment and attendance from the three schools of the Faculty of Communication Sciences. After applying probabilistic sampling there were 132 students. The results indicated that the students are not very satisfied with the dimensions: Subjects (21.3 %), Teaching 11.3 % and Contents of the syllabus (26.8 %), but with the dimensions communication and platform or virtual environment, satisfaction is average (43 %). It is concluded that a platform based on open software adapted to the reality of the FCCSS-UNFV is necessary, training for students and teachers in the use of new technologies and virtual environments. Acquire new equ...
10
artículo
The objective was to determine how remote education is related to the academic satisfaction of FCCSS UNFV 2020-1 students. The research was basic, with a descriptive scope or level and a non-experimental design. There was a population of 503 students with regular enrollment and attendance from the three schools of the Faculty of Communication Sciences. After applying probabilistic sampling there were 132 students. The results indicated that the students are not very satisfied with the dimensions: Subjects (21.3 %), Teaching 11.3 % and Contents of the syllabus (26.8 %), but with the dimensions communication and platform or virtual environment, satisfaction is average (43 %). It is concluded that a platform based on open software adapted to the reality of the FCCSS-UNFV is necessary, training for students and teachers in the use of new technologies and virtual environments. Acquire new equ...
11
artículo
Publicado 2020
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The polluting elements in the Earth's atmosphere, specifically throughout to the troposphere space that corresponds, NO2, are increasingly dispersed at higher altitudes, ranging from 0 meters above sea level to 10,000 meters above sea level, this study analyzes the behavior of this pollutant element at altitudes of 10 meters, 5 thousand meters and 10 thousand meters where the behavior of this pollutant shows saturation areas with this element in South America troposphere area, the NO2 among other gases that affect these atmospheric zones can be found at altitudes greater than one thousand meters that corresponds to the outer zone of boundary layer in the atmosphere, affecting air spaces even beyond the range of the troposphere, in this work, We analyze the lower, middle and upper areas of the troposphere, which in altitudes means at 10, 5,000 and 10,000 meters. The study visualizes the N...
12
artículo
Publicado 2021
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The objective of this study was to describe the performance of teachers at the secondary level of the district of Huancavelica-Peru, in the implementation of a remote education in times of the Covid-19 pandemic, digital and social-emotional behavior in a social situation of isolation. The study is of a qualitative nature, framed in the type of socio-critical interpretive paradigm research, designed through grounded theory methodology, with the application of the semi-structured interview in a sample of 4 teachers from the different curricular areas, 4 hierarchical teachers (managers and coordinators) and 6 students of the VII cycle of secondary education. The following conclusions were reached; (1) Teachers in these times of the Covid-19 pandemic have been facing complex moments of work, due to the drastic change from face-to-face education to remote education, which has a format very di...
13
artículo
Publicado 2021
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The objective of this study was to describe the performance of teachers at the secondary level of the district of Huancavelica-Peru, in the implementation of a remote education in times of the Covid-19 pandemic, digital and social-emotional behavior in a social situation of isolation. The study is of a qualitative nature, framed in the type of socio-critical interpretive paradigm research, designed through grounded theory methodology, with the application of the semi-structured interview in a sample of 4 teachers from the different curricular areas, 4 hierarchical teachers (managers and coordinators) and 6 students of the VII cycle of secondary education. The following conclusions were reached; (1) Teachers in these times of the Covid-19 pandemic have been facing complex moments of work, due to the drastic change from face-to-face education to remote education, which has a format very di...
14
tesis de grado
Publicado 2023
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This study aims to design a piece of distillation equipment, with greater efficiency and extraction capacity. Currently, there are steam distillation machines, most of these equipment has the capacity to distill between 1 to 100 kilograms of material. In the present design, a linear vapor trace distillation is applied, with a capacity to distill 200 kilograms of schinus "molle"; on the other hand, the equipment will have connection to a mobile phone through Arduino, from which it will be possible to make emergency stops. This research was obtained through calculations showing that 1.89 liters of essential oil can be extracted from every 200 kilograms of molle. Finally, it is concluded that the current still is theoretically more efficient, extracting much more oil than the other still. Also, it has the capacity to distill all those roots, stems, leaves, flowers, and seeds that have an es...
15
artículo
Publicado 2022
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Introduction: The COVID-19 pandemic caused face-to-face outpatient care in health establishments to be restricted, the government establishes actions to continue providing said health services. Objective of the study: To describe the usability of the virtual health care in the COVID-19 quarantine period at the National Institute of Child Health (INSN) of Peru. Material and methods: Cross-sectional study. 7,697 patients were admitted to the INSN for virtual outpatient consultation from May to July 2020. The sampling was simple random and there was a sample of 374 participants who met the selection criteria. The telehealth usability questionnaire (TUQ) was used. Parents of patients who received virtual consultation were interviewed by telephone. Results: The average age of the interviewees was 36.2 years, mostly women and from Lima. The average age of the patients treated is 6.7 years, bei...
16
artículo
Publicado 2010
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The XX century has brought an unprecedented development in the history of humanity with impressive advances in all disciplines of science and technology. But these progresses have not been something free, but have had a price that would not be unreasonable to consider that, under certain prisms, has been excessive. During the past 100 years, the human population on earth has increased by a factor of 4 (from 1600 million in 1900 to over 6,000 million today). However water consumption has increased by 9 in the same period and power consumption by 16, and therefore associated with a degradation of the environment and natural resources in general, very significant. Keywords.-
17
artículo
Publicado 2010
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The XX century has brought an unprecedented development in the history of humanity with impressive advances in all disciplines of science and technology. But these progresses have not been something free, but have had a price that would not be unreasonable to consider that, under certain prisms, has been excessive. During the past 100 years, the human population on earth has increased by a factor of 4 (from 1600 million in 1900 to over 6,000 million today). However water consumption has increased by 9 in the same period and power consumption by 16, and therefore associated with a degradation of the environment and natural resources in general, very significant.
18
artículo
Publicado 2022
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Background: Due to the pandemic, the Peruvian State decided to implement quarantine during a period of 2020 which caused changes in behavior, one of those: choosing to self-medicate. Therefore, the objective of this study is to describe the characteristics of self-medication in patients suspected of COVID-19 in Lambayeque during 2020. Materials and methods: cross-sectional analytical observational study in which a telephone survey was applied to 462 patients randomly selected volunteers. Subsequently, a descriptive analysis was performed and associations were searched. Results: the mean age was 42 years (minimun age = 18; maximun age = 90), more than half were women (58%), the majority had higher education (61.7%), they lived in the urban area of Lambayeque (86, 6%) and 64.9% were affiliated with EsSalud. More than half (53.9%) self-medicated during the pandemic, ivermectin (35.7%;...
19
artículo
Publicado 2023
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The increasing formation of glacial lakes and their expansion in recent years increases the risk of alluviums due to glacial lakes outburst floods in high tropical mountains, such as the one that destroyed part of the city of Huaraz in 1941 in the Cordillera Blanca, of the central Andes of Peru. Given the danger faced by the more than 130,000 people who inhabit the alluvial fan of Quilcay River, were analyzed the interannual variation of the surface of the Palcacocha Lake, the glacial surface of its micro-basin and the variation of the surrounding climate between the years 1984 and 2022, to determine the relationships that would exist between these variables, as an indicator of the risk of flooding due to overflow of the lake. For this, the surface of the lakes and the area of the glacier were calculated with multispectral Landsat images and compared with the result of the processing of ...
20
artículo
Publicado 2022
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Objective: To determine the relationship between quality of care and satisfaction of users treated via gynecologic oncology telemedicine from August to October 2021. Materials and methods: An observational, cross-sectional and prospective study conducted with 302 users. Instruments: modified SERVPERF questionnaire to evaluate the quality of care, MINSA’s checklist to evaluate the structure, and telemedicine time record sheet to evaluate the process. Data was analyzed using IBM SPSS Statistics V27 and Fisher's F test with p < 0.05. Results: Compliance with the structure was 66.67 % according to MINSA. Regarding the process, patient waiting time to get a telemedicine appointment was 1 to 7 days in 53.31 %, patient waiting time to begin a telemedicine consultation was < 10 minutes in 64.22 %, and telemedicine length was 11 to 15 minutes in 41.39 %. Quality of care dimensions such as...
