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Comparación de los parámetros de resistencia al corte determinados por los ensayos geotécnicos de corte directo y triaxial en el suelo de la futura habilitación urbana Fundo Los Mangos en el distrito de Chiclayo, departamento de Lambayeque
Full text linkLa presente investigación buscó comparar los parámetros de resistencia al corte determinados por ensayos geotécnicos de corte directo y triaxial en el suelo de la futura habilitación urbana Fundo Los Mangos, distrito de Chiclayo, departamento de Lambayeque. Se utilizó un enfoque cuantitativo descriptivo con un diseño no experimental pues no se realizó manipulación de los datos. Es así que se analizó el suelo para contenido de humedad, análisis de tamaño de partículas, límites de consistencia y sales solubles totales con el propósito de clasificar al suelo mediante la metodología
SUCS, encontrando que se trata de una arcilla altamente plástica con sales inofensivas. A su vez, se ejecutaron pruebas triaxiales y de cortes directo, ambos de tipo no drenado - no consolidado bajo las mismas condiciones, donde se encontraron valores de cohesión por debajo de 0.240kg/cm2 y 21° en el caso del ángulo de fricción. Con esto, se concluye que la relación entre el parámetro de cohesión está determinada por Cct = 0.500 (Ccd) + 0.080, mientras que, para el parámetro de ángulo de fricción, la fórmula es la siguiente Oct = 0.414 (Ocd) + 13.414.Campus Chiclay
Influence of arbuscular mycorrhizal fungi on biological control of coffee leaf rust (Hemileia vastatrix Berk. & Broome)
Full text linkInoculating plants with arbuscular mycorrhizal fungi (AMF) protects host plants against biotic stressors such as diseases. Therefore, the objective of this study was to evaluate the influence of arbuscular mycorrhizal fungi in the biological control of coffee leaf rust (CLR) infections. The research involved two varieties of coffee (Caturra and Pache) and three inocula of AMF: Moyobamba (Acaulospora mellea, Acaulospora sp.1, Glomus geosporum, Glomus sp.1, andGlomus sp.2), El Dorado (Acaulospora rugosa, Acaulospora spinosissima, Acaulospora lacunosa, Glomus sinuosum andAmbispora appendicula) and Huallaga (Acaulospora mellea, Acaulospora sp.1, Acaulospora sp.2, Glomus macrocarpum and Glomus sp.2), in addition to a control treatment without application of AMF (non-AMF). Inoculation of vegetatively propagated coffee plants with AMF was observed to induce tolerance to CLR. The incidence of CLR in non-AMF coffee plants was 43.7 %, while in the coffee plants subjected to the inocula Moyobamba, El Dorado and Huallaga, the incidences were 22.1, 22.7 and 13.2 %, respectively. Likewise, the severity in non-AMF coffee plants was 34.8 %, while in the coffee plants subjected to the three kinds of inocula, the severities were 21.1, 20.4 and 12.0 %, respectively. Thus, mycorrhizal inoculation of coffee plants at the nursery stage reduces the negative effect of CLR infection after the plants are taken to field conditions, representing a sustainable option for their biological control.Campus Lima Centr
Edge device for movement pattern classification using neural network algorithms
Full text linkPortable electronic systems allow the analysis and monitoring of continuous time signals, such as human activity, integrating deep learning techniques with cloud computing, causing network traffic and high energy consumption. In addition, the use of algorithms based on neural networks are a very widespread
solution in these applications, but they have a high computational cost, not suitable for edge devices. In this context, solutions are created that bring data analysis closer to the edge of the network, so in this paper models adapted to an edge device for the recognition of human activity are evaluated,
considering characteristics such as inference time, memory, and precision.
Two categories of models based on deep and convolutional neural networks are developed by implementing them in C language and comparing with the TensorFlow Lite platform. The results show that the implementations with libraries have a better accuracy result of 76% using principal component
analysis inputs, obtaining an execution time of 9ms. Therefore, when evaluating the models, we must not only consider their accuracy but also the execution time and memory on the device.Campus Lima Centr
Scientometric study of treatment technologies of soil pollution: present and future challenges
Full text linkThere are few bibliometric studies showing current technologies and their combinations for the remediation of contaminated soils. For this reason, a scientometric study was carried out in order to know the trends in soil contamination treatment technologies. The study considered original articles and reviews published in the Scopus and Web of Science databases between January 2010 and June 2021, evaluating: (a) characteristics of the publications, (b) main research sources, (c) citations and production by journals, (d) keywords used, (e) countries, institutions and authors active in research production, (f) most cited articles and (g) trends in soil treatment and remediation techniques. The results showed: (a) continuous growth of publications on soil remediation in the “Environmental Science” subject area and a limited contribution of the “Soil Science” and “Agriculture and Biological Science” subject areas, (b) leadership of countries such as China, USA, India, Italy and Spain in research production, (c) phytoremediation, bioremediation and biodegradation were the most studied treatment technologies in the last decade and (d) recent research (from 2020) studied pesticides and herbicides, including Chlorimuron-ethyl and also microplastics and other emerging pollutants. It is also noted that the current trend of combinations of techniques for the treatment of soil contamination is attractive for future research.Campus San Juan de Luriganch
Computer vision syndrome in teachers of a university of the province of Lima
Full text linkVirtual education has generated consequences at the visual level of people during the coronavirus pandemic since spending more time on the computer, it compromises the eye health of the person causing long-term visual problems, so its research objective is to determine the computer-related
ophthalmic syndrome in teachers at a university of the province of Lima. It is a quantitative, non-experimental, descriptive, and cross-sectional study, with a total population of sixty-three teachers who answered a digital survey with socio-demographic data and the Computer Vision Syndrome Questionnaire
(CVS-Q) instrument. In the results, we can observe the results of the computerized ophthalmic syndrome in teachers at a university in the province of Lima, where 51 (81%) of the teachers do not present computer
vision syndrome, and 12 (19%) present computer vision syndrome. In conclusion, the population conducting virtual education should be educated as well as students about prevention measures for computer ophthalmic syndrome and its consequences.Campus Lima Nort
Repercusiones de las desigualdades de género en la salud mental de los y las pacientes
No full textParten de un estudio de investigación para destacar que en el diagnóstico y medicación a pacientes con problemas de salud mental también se incluya el análisis de la desigualdades de género.Campus Lima Centr
Technology in the educational processes of basic education in Peru
Full text linkThis research project aimed to give a perspective on the implementation of technologies in basic education in Peru. How the automation of basic education processes in Peru helps students, parents, teachers, and administrative staff to reduce time, to have better educational quality, and to obtain indicators for the teacher and student. The methodology of the research is a sequence of activities that allow us to design a framework for process technologies in basic education in Peru. Based on online surveys, it was possible to obtain information from people who want a change in the processes of education, such as: having more reach to information with the help of the internet for which mobile applications or web applications are needed, the delivery of evaluations and enrolment via online, taking advantage of technology for the benefit of the student and teachers, and other processes. The research has a qualitative approach. It is also descriptive in scope with the help of other studies or tests conducted. For the creation of this article, we used surveys, scientific journals, and our own experience as practitioners. If we want to improve education, it is necessary to improve educational processes with the help of technology and the internet.Campus Lima Centr
Use of tangerine waste as fuel for the generation of electric current
Full text linkFruit waste has increased exponentially worldwide, within which tangerine is one of those
that generates a greater amount of organic waste, which is currently not fully used. On the other
hand, microbial fuel cells (MFCs) are presented as an opportunity to take advantage of organic waste
to generate electricity, which is why the main objective of this research is to generate bioelectricity
using tangerine waste as a substrate in microbial fuel cells using zinc and copper electrodes. It was
possible to generate current and voltage peaks of 1.43973 ± 0.05568 mA and 1.191 ± 0.035 V on days
eighteen and seventeen, respectively, operating with an optimum pH of 4.78 ± 0.46 and with electrical
conductivity of the substrate of 140.07 ± 3.51 mS/cm, while the Brix degrees gradually decreased
until the last day. The internal resistance determined was 65.378 ± 1.967 Ω, while the maximum
power density was 475.32 ± 24.56 mW/cm2 at a current density of 5.539 A/cm2 with a peak voltage
of 1024.12 ± 25.16 mV. The bacterium (Serratia fonticola) and yeasts (Rhodotorula mucilaginosa) were
identified in the substrate with an identity of 99.57 and 99.50%, respectively. Finally, the cells were
connected in series, managing to generate 3.15 V, which allowed the turning on of a red LED light.Campus Trujill
Shade management and pruning in two coffee varieties vs. plant growth and leaf rust in the Peruvian amazon
Full text linkCoffee leaf rust (CLR) is a fungal infection which is devastating susceptible coffee plantations throughout the South American region in the last years. The objective of this study was to analyze the effects of shade trees management and pruning in two coffee varieties against coffee leaf rust in the Peruvian Amazon. The experimental design was a randomized complete block with factorial scheme 2A×2B×4C with 16 treatments and four repetitions, making a total of 64 experimental units, in which each experimental unit had 16 coffee plants. The studied factors were agroforestry system (A), coffee varieties (B), and pruning methods (C). The data were statistically examined by analysis of variance and mean comparisons using Tukey test. It was found that plant growth was favored by the useInga shade and recepa pruning in Typica variety. Also, the use of polyculture-shaded coffee with about 40 % of shadow, and recepa (cutting the stem of the plant at 40 cm from the ground), reduce the incidence and severity of CLR in coffee plants. The incidence and severity of CLR was lower in the Typica variety as compared to Pache variety. This study confirms that a shadow management and pruning coffee plants stimulate the growth of new branches and reduce incidence and severity of CLR in coffee plantations.Campus Lima Centr
The impact of risk-taking and creativity stimuli in education towards innovation: A systematic review and research agenda
Full text linkAcademic research on educational stimuli of risk-taking and creativity to foster innovation can
contribute to overcome the challenges faced by organizations in the marketplace. To explore the
contributions provided in this field, this study developed a bibliometric and systematic review on
academic production in the domain of creativity, risk-taking and innovation through an educa-
tional perspective. The bibliographical databases adopted were Web of Science and Scopus and
outcomes were analysed using the Bibliometrix tool in R software. Research findings point to
three main clusters of academic production: (i) Tools and techniques to boost creativity; (ii)
Educational interventions towards innovativeness; and (iii) Antecedents of entrepreneurial ac-
tivity. This study pictures entrepreneurial education as a field that is still in its infancy and, thus,
provide opportunities for research and education policies and programs design. It was revealed
that there are two relevant fields that can be envisaged as motor themes for policies and programs
design: (i) “social innovation, design education, and design thinking” and (ii) “education, design,
and design process”. Both fields point to the dominance of multidisciplinary approaches and
design as a central vehicle to creativity, risk-taking, and innovation diffusion.Campus Lima Centr