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1
documento de trabajo
Este documento analiza diferentes estadísticos basados en los residuos para la hipótesis nula de no cointegración utilizando MCG para eliminar los componentes determinísticos. Las distribuciones asintóticas son simuladas para los casos donde un intercepto y un intercepto y una tendencia son incluidos en la ecuación de cointegración. Los resultados muestran que las distribuciones asintóticas dependen del número de regresores (variables xt), el número y clase de componentes determinísticos y un parámtro de nuisamce R2 que mide la correlación de largo plazo entre los regresores xt y la variable yt. Los resultados muestran que MCG permiten obtener más potencia que el uso de MCO. Esto es más claro para valores de R2 menores que 0:4 y un solo regresor xt. Para valores mayores de R2 los denominados estadísticos ECR son mejores para cualquier número de regresores. En particular ...
2
artículo
This project focuses on presenting a reference model based on tools already created to automate the process of performing functional tests during the evaluation of the quality of the developed product. This automation includes the evaluation of certain automated test management tools and automated functional testing.Software development and computer provide quality service is what is currently achieved with functional tests made in the development stage. This process is very important and critical part in the development process and must be done with greater efficiency and better efficiency. During the project the current processes that are part of the application development methodology, both theoretically and in practice met. Automation tools and methodologies for testing were evaluated. It was considered very important that both methodological solutions and technical support aspects s...
3
artículo
Non engineering dwellings represents 83% of the stock of housing in emerging areas of Lima city. These dwellings are build with non-appropriated masonry bricks with walls that limits don´t meet the displacement control of the earthquake design standards NTE-030 and NTE-070. Considering the database of structural test of 33 years of experimental studies of the Structural Laboratory of CISMID, typical behavior curves are studied in order to propose damage limit state for masonry walls: build with industrial bricks, build with handmade bricks and build with horizontal hollow tubular bricks. Also, results of full-scale test on masonry house performed in the laboratory are studied. Ranges of inelastic development limit states of walls are proposed from the test results of full-scale test of the three types of masonry. Big difference in the capacity of walls with tubular bricks in comparison ...
4
artículo
Publicado 2020
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An assay based on the survival rates of UV-irradiated yeast Saccharomyces cerevisiae cells was used to compare the photoprotectant capabilities of several commercial sunscreens with different sun protection factors (SPFs). Ten lotions with SPF values from 15 to 100 were tested using UVB and UVC irradiations. The results showed that all lotions with SPFs ≥50 exhibited similar photoprotectant capabilities. However, the lotions with SPF 15 and SPF 30 exhibited proportionally lower photoprotection levels. Likewise, the prices per gram of the analyzed lotions were compared, finding them widespread. Since the photoprotection levels of the lotions with SPF values above 50 were equivalent, it could be inferred that other factors are responsible for the variations in the prices, such as the recognition of the brand name, product presentation, marketing strategies, and others. This work shows th...
5
artículo
Publicado 2024
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One of the most used ecotoxicity bioassays is based on the luminescence of Vibrio fischeri, for which commercial kits such as Microtox® and several others are available. However, this assay might not always be suitable for several reasons: Its protocol cannot be easily adapted for particular purposes, and it requires the continuous purchases of the kit and the availability of specialized equipment or at least, a luminometer. As a versatile alternative, this paper describes an optimized and kit-free protocol, referred to as “Macrotox”, which allows a wide range of treatment periods (for example, 1, 3, 7, 12, 24, 30 and 36 h) to follow the effects on the luminescence and proliferation of V. fischeri. While the optimized protocol involves 1-mL treatments, it could be easily adapted to use other volumes and times. Importantly, to evaluate the effects on luminescence, only a digital came...
6
artículo
Publicado 2017
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This paper proposes an analytic framework for the balancing or weighing test, as an instance of a Multiple-Criteria Decision Analysis (MCDA), like the ones used in disciplines like management or operations research. The change in perspective allows for an enrichment of our comprehension concerning the test, and permits an increment in its pretentions of rationality in the process of solving conflicts, in which is necessary to arrive to an optimal solution. In the first section we propose a conceptual framework concerning the development of MCDA models. Then we show three models of balancing tests proposed in the specialized literature, one of which is the model proposed by Robert Alexy. Finally, departing from a comparison between constitutional balancing and the reasonableness test, used by Indecopi, we present a complex model of balancing, which counts with two perspectives: on...
7
tesis de grado
Publicado 2025
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This research focuses on designing an automated test bench for alternators, which incorporates real - time monitoring using Internet of Things (IoT) technologies, advanced electrical analysis, and intelligent diagnostics based on a Multilayer Perceptron (MLP ) artificial intelligence model. The system allows the testing of automotive alternators under various operating conditions, measuring the RPM, voltage, and current generated and sending the data to a web platform via an ESP32 microcontroller. Multiple tes ts were performed during the experiment at various load levels and speeds, demonstrating a direct relationship between voltage and RPM. Additionally, the PZEM - 003/017 achieved a measurement margin of error of less than 1%, and the AI model's fault detectio n accuracy exceeded 90%. Likewise, a finite element analysis (FEA) of the system's structural framework was performed, valida...
8
artículo
Publicado 2017
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The present research aimed to contribute to seismic vulnerability in buildings of limited ductility walls. For this, fragility curves have been developed in walls of limited ductility of 10 cm of thickness according to the PACT of the P-58 FEMIA. Data were collected from 20 experimental tests carried out in the structure laboratory of the Peruvian Center for Seismic Investigation and Disaster Mitigation of the National University of Engineering. Fragility curves express the probability that a limited ductility wall will reach or exceed a selected damage state for a given drift or displacement level. From the fragility curves it ¡is possible to observe that the probability of exceeding 50% of damaging state 2 (maximum wall strength) is: 13mm for MDL-CCA1, 16mm for MDL-CCA2, 20mm for MDL- 2mm for MDL-CCA9, 4mm for MDL-CCA5, 4mm for MDL-CCA6, 5mm for MDL-CCA7, 4mm for MDL-CCA8, and 4mm for...
9
artículo
Publicado 2017
Enlace
Enlace
The present research aimed to contribute to seismic vulnerability in buildings of limited ductility walls. For this, fragility curves have been developed in walls of limited ductility of 10 cm of thickness according to the PACT of the P-58 FEMIA. Data were collected from 20 experimental tests carried out in the structure laboratory of the Peruvian Center for Seismic Investigation and Disaster Mitigation of the National University of Engineering. Fragility curves express the probability that a limited ductility wall will reach or exceed a selected damage state for a given drift or displacement level. From the fragility curves it ¡is possible to observe that the probability of exceeding 50% of damaging state 2 (maximum wall strength) is: 13mm for MDL-CCA1, 16mm for MDL-CCA2, 20mm for MDL- 2mm for MDL-CCA9, 4mm for MDL-CCA5, 4mm for MDL-CCA6, 5mm for MDL-CCA7, 4mm for MDL-CCA8, and 4mm for...
10
artículo
Publicado 2017
Enlace
Enlace
The present research aimed to contribute to seismic vulnerability in buildings of limited ductility walls. For this, fragility curves have been developed in walls of limited ductility of 10 cm of thickness according to the PACT of the P-58 FEMIA. Data were collected from 20 experimental tests carried out in the structure laboratory of the Peruvian Center for Seismic Investigation and Disaster Mitigation of the National University of Engineering. Fragility curves express the probability that a limited ductility wall will reach or exceed a selected damage state for a given drift or displacement level. From the fragility curves it ¡is possible to observe that the probability of exceeding 50% of damaging state 2 (maximum wall strength) is: 13mm for MDL-CCA1, 16mm for MDL-CCA2, 20mm for MDL- 2mm for MDL-CCA9, 4mm for MDL-CCA5, 4mm for MDL-CCA6, 5mm for MDL-CCA7, 4mm for MDL-CCA8, and 4mm for...
11
artículo
Publicado 2013
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Enlace
This research work had as main objective optimizing the general acceptability though affective tests and response surface methodology of a dry cacao powder mixture based beverage. We obtained formulations of mixtures of cacao powder with different concentrations of 15%, 17.5% and 20%, as well as lecithin concentrations of 0.1%; 0.3%; and 0.5% maintaining a constant content of sugar (25 %), Vanillin (1%) that included cacao powder with different pH values: natural (pH 5) and alkalinized (pH 6.5 and pH 8) and water by difference to 100%, generating a total of fifteen treatments to be evaluated, according to the Box-Behnen design for three factors. The treatments underwent satisfaction level tests to establish the general acceptability. The treatment that included cacao powder with a concentration of 17.5 %, pH 6.5 and lecithin concentration of 0.3 % obtained the best levels of acceptabilit...
12
artículo
Publicado 2013
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This research work had as main objective optimizing the general acceptability though affective tests and response surface methodology of a dry cacao powder mixture based beverage. We obtained formulations of mixtures of cacao powder with different concentrations of 15%, 17.5% and 20%, as well as lecithin concentrations of 0.1%; 0.3%; and 0.5% maintaining a constant content of sugar (25 %), Vanillin (1%) that included cacao powder with different pH values: natural (pH 5) and alkalinized (pH 6.5 and pH 8) and water by difference to 100%, generating a total of fifteen treatments to be evaluated, according to the Box-Behnen design for three factors. The treatments underwent satisfaction level tests to establish the general acceptability. The treatment that included cacao powder with a concentration of 17.5 %, pH 6.5 and lecithin concentration of 0.3 % obtained the best levels of acceptabilit...
13
artículo
Publicado 2022
Enlace
Enlace
Objective: To determine the diagnostic performance of the immunochromatography technique or lateral flow for the detection of antibodies in patients with human fasciolosis. Materials and methods: Observational, prospective and cross-sectional study. We have developed a lateral flow test (Fasciorap) for the serological diagnosis of fasciolosis due to F. hepatica, composed of excretion-secretion antigens of adult forms conjugated with orocolloid of 40 nm and a protein A and IgG of rabbit anti F. hepatica as detector reagents in the test and control line, flanked by pads in a cassette. 240 sera were evaluated, 120 positive, 50 sera from patients with other parasites, 20 from patients with infectious diseases and 50 sera from non-parasitized people, the interpretation of results was performed by visual inspection 15 minutes after applying the samples. Results: The test detected the presence ...
14
artículo
Publicado 2019
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Introduction: The use of Papanicoloau Conventional Cytology (CC) versus Liquid Base (CBL), the professional who performs the extraction, first reading and diagnosis of the sample; the use of the Bethesda classification, the detection of HPV DNA and the follow-up of ASCUS findings are links in the screening of Uterine Cervical Cancer (CCU) little studied in our environment. Objective: To determine the characteristics of the CCU cancer screening in 08 health facilities (EESS) of Metropolitan Lima, the headquarters of the Medical Board of the FAMURP in 2017. Methods: Descriptive, transversal. Sampling for convenience. The Chiefs of Pathology Services were interviewed. Results: 8 EESS of Level III of the MINSA, EsSalud and FFAA participated. All performed the CC, none CBL. The samples are taken by the Gynecologist or the Obstetrician, and in 1 case by nursing, the first reading is performed ...
15
artículo
OBJECTIVES: To analyze the labour of a multidisciplinary work group in preparing of an instrument for asssessing the performance of students during work sessions of the teaching strategy tenned ProblemBased Leming (PBL), as well some methods useful for previos assessment of instrument and its results, in order to prepare the questionnaire for its statistical assessment. MATERIALS AND METHODS: Four critical areas were taken into account: Characteristics and organization of both the work group and the instrument to be prepared, appearance validity or content validity, clarity validity, and the labour of the group after the factorial analysis. RESULTS AND CONCLUSIONS: A work group for development of an academic assessment instrument must include people willing to team-working and coordinators expert in this field; enough time, new skills development and thoroughly reviews are required for a...
16
tesis de grado
Publicado 2025
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El presente trabajo realizado tiene como objetivo analizar la importancia de los Precios de Transferencia y su aplicación correcta por parte de las Empresas que se encuentran sujetas a este Ámbito de aplicación a fin de evitar la erosión de la base imponible. Se realiza una revisión de las normativas vigentes (internacional y local), así como también se muestra la aplicación de las normas de Precios de Transferencia a través de un caso práctico enfocado en el análisis de las transacciones que tiene una Empresa y las metodologías aplicadas a las transacciones (ventas de mercadería, préstamos y servicios) con el fin de evaluar el valor de mercado, verificando el cumplimiento del Principio de Plena Competencia, que se estipula en la normativa emitida por SUNAT. Se identifican las implicancias de encontrarse por debajo, dentro, o por encima del denominado rango de mercado para ...
17
artículo
Publicado 2024
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Life skills are considered necessary to achieve healthy human development and their teaching has spread globally through the implementation of prevention programs in school environments. However, these programs require easy to use instruments with adequate psychometric properties. This study aims to provide validity evidence based on the internal structure for the Life Skills Test, and to design a short version to assess life skills in Mexican adolescents and young people in school. In this psychometric study the Life Skills Test was administered to 897 students (Mage = 20.70, SD = 3.73); 74.7 % were women (M age = 20.49, SD = 3.16), 25.3 % men (M age = 21.33; SD = 5.01). 2.6 % were secondary and upper secondary education, 95.4 % undergraduate and 2% postgraduate students. The original test consists of 80 items and identifies ten life skills. In this research, the original test did not s...
18
artículo
Publicado 2024
Enlace
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Life skills are considered necessary to achieve healthy human development and their teaching has spread globally through the implementation of prevention programs in school environments. However, these programs require easy to use instruments with adequate psychometric properties. This study aims to provide validity evidence based on the internal structure for the Life Skills Test, and to design a short version to assess life skills in Mexican adolescents and young people in school. In this psychometric study the Life Skills Test was administered to 897 students (Mage = 20.70, SD = 3.73); 74.7 % were women (M age = 20.49, SD = 3.16), 25.3 % men (M age = 21.33; SD = 5.01). 2.6 % were secondary and upper secondary education, 95.4 % undergraduate and 2% postgraduate students. The original test consists of 80 items and identifies ten life skills. In this research, the original test did not s...
19
tesis de grado
Publicado 2024
Enlace
Enlace
When visiting health facilities in the interior of Peru, considered as rural areas, we mostly found many shortcomings in the management of health facilities, which is not allowing efficient management, one of the processes is the registration of clinical and pathological analysis, the information they have are in Excel books or notebooks, which makes it difficult to search for patient and processing reports, stopping the good service in health facilities and delays the patient waiting for their results. In this paper we present the design of a web system for the process of care in the clinical laboratory service in health facilities in rural areas, we present the details of the implementation, the main interfaces and a statistic related to the application.
20
artículo
Publicado 2019
Enlace
Enlace
Introduction: The use of Papanicoloau Conventional Cytology (CC) versus Liquid Base (CBL), the professional who performs the extraction, first reading and diagnosis of the sample; the use of the Bethesda classification, the detection of HPV DNA and the follow-up of ASCUS findings are links in the screening of Uterine Cervical Cancer (CCU) little studied in our environment. Objective: To determine the characteristics of the CCU cancer screening in 08 health facilities (EESS) of Metropolitan Lima, the headquarters of the Medical Board of the FAMURP in 2017. Methods: Descriptive, transversal. Sampling for convenience. The Chiefs of Pathology Services were interviewed. Results: 8 EESS of Level III of the MINSA, EsSalud and FFAA participated. All performed the CC, none CBL. The samples are taken by the Gynecologist or the Obstetrician, and in 1 case by nursing, the first reading is performed ...
