Mantenimiento preventivo para mejorar la productividad en la línea de dispersores de pintura en la Industria Jhómeron S.A. Comas – 2019

El presente estudio titulado mantenimiento preventivo para mejorar la productividad en la línea de dispersores de pintura en la industria Jhómeron S.A. Comas 2019 cuyo objetivo principal fue cómo el mantenimiento preventivo mejora la productividad en la línea de dispersores de pintura en la industria Jhómeron S.A., respaldadas por las teorías de los autores Francisco Rey Sacristán quien contextualiza que el mantenimiento preventivo reduce las averías y fallas encontradas en los equipos o instalaciones en las cuales se dimensionaron a través de fichas de inspección como el check list y el de la disponibilidad del equipo llevando a mejorar la productividad y la teoría desarrollada por Humberto Gutiérrez quien expresa que la productividad tiene que ver con los resultados que se tienen en un sistema o proceso, en la cual se midió a través de las dimensiones de eficiencia y eficacia. La presente investigación por el tipo es cuantitativa aplicada, por su nivel es descriptiva y por su diseño de cuasiexperimental. Tuvo como población y muestra la producción diaria de galones de pintura durante un periodo de 90 días. Al ser la muestra igual a la población no se necesitó muestreo. Los datos para el estudio fueron de recolección con la ayuda de los operarios de los dispersores. La validez de dicho instrumento se midió con el juicio de expertos, teniendo en cuenta a 3 ingenieros industriales de la Universidad Cesar Vallejo. Los datos tomados son datos reales tomados de su base de datos de la industria Jhómeron S.A., siendo datos oficiales asume su confiablidad. Según los resultados arrojados por los programas usados, se concluyó, que el mantenimiento preventivo mejoro significativamente la productividad en un 13.1%, la eficiencia en un 7.6% y la eficacia en un 7.5%

Teselados en el club de matemáticas

Cuando se habla de teselados por lo general se suelen relacionar con embaldosados del plano empleando polígonos regulares o algunas figuras construidas a partir de deformaciones de ´estos polígonos; el curso titulado Matemática y Arte I, ofrecido en el club de matemáticas de la UPN en el primer semestre del 2006, no fue ajeno a esto, sin embargo, se produjeron también resultados de interés en relación con la construcción de teselados duales y teselados construidos con polígonos irregulares. Los resultados que se presentan corresponden a los obtenidos por los niños y jóvenes que participaron del curso y orientados por los autores de esta memoria

Agreement of Health Status Classification and Body Composition Differences in Asian Indian Students upon Residence in the United States

Obesity is one of the major health problems in the United States (U.S.). As Asian Indian students immigrate to the U.S., the effect of acculturation to the U.S. lifestyle is an area of concern. PURPOSE: The purpose of this study was two-fold: 1) examine the health-risk status of Asian Indians with respect to agreement in classifications of percent body fat (PF) and body mass index (BMI), and 2) examine the effects of U.S. residence duration on body composition of Asian Indian college students. METHODS: Forty-two Asian Indian males and females were divided into two groups according to length of residence. First year residents resided in the U.S. for ≤ 4 months, second year residents had resided in the U.S. for ≥ 1 year. Height and weight were recorded for BMI. PF was measured by whole body air displacement plethysmography. Percent agreement was determined between the health risk classifications of both BMI and PF. The effect of gender and U.S. residence duration were determined on both BMI and PF using Factorial ANOVA. RESULTS: The percent agreement between BMI and PF on classification of health status was 69.05%. Two exclusive 2 (gender) x 2 (residence duration) between subjects factorial ANOVAs were calculated comparing the BMI and PF by group and gender. For BMI, the main effect for gender was not significant (F(1,38)=0.023, p\u3e0.025). A significant effect for U.S. residence duration was found (F(1,38)=20.193, p\u3c0.025). Students of the second year demonstrated a higher mean BMI (m=26.52, sd=0.78) than the first year (m=21.57, sd=0.78). The interaction was not significant (F(1,38)=0.647, p\u3e0.025). Thus, the difference in BMI due to U.S. residence duration is not influenced by differences in gender. For PF, a significant main effect for the gender was found (F(1,38)=31.354, p\u3c0.025). A significant main effect for U.S. residence duration was found (F(1,38)=13.044, p\u3c0.025). Second year students demonstrated a higher mean PF (m=33.98, sd=1.61) as compared to the first year (m=25.78, sd=1.61). The interaction was not significant (F(1,38)=0.97, p\u3e0.05). The effect of gender was not influenced by residence duration. CONCLUSION: Agreement information indicates the discrepancy between the two methods of determining health status in Asian Indians. Additionally, this study demonstrates that as a result of one year in the U.S., second year students had higher body composition values than first year students

Cadena de suministros y ventaja competitiva de la empresa metalmecánica Fabricaciones Alcántara E.I.R.L., Lima 2022

En la presente investigación se tiene como objetivo determinar la relación existente entre la cadena de suministros y la ventaja competitiva en la empresa Fabricaciones Alcántara E.I.R.L. Lima 2022. El tipo de investigación es aplicada, tuvo un enfoque cuantitativo no experimental a través de un diseño de descriptivo, lo que permitió conocer la asociación de las variables. Los datos se obtuvieron a través de dos cuestionarios en escala de Likert aplicados a una población de 100 colaboradores, la muestra fue censal, abarcando la totalidad de la población, asimismo se evidenció una alta confiabilidad según el Alfa de Cronbach en ambas variables. Los resultados hallados indican una alta relación entre las variables en estudio, al obtener una sig. =0.000, evidenciando ser menor a 0.050, de esta manera se rechazó la H0, manifestando que existe relación entre ambas variables de estudio. Asimismo, el coeficiente de correlación fue de 0.913, demostrando una asociación positiva alta entre la cadena de suministros y la ventaja competitiva de la empresa metalmecánica Fabricaciones Alcántara E.I.R.L. Lima 2022

Proyectos finales integradores : una alternativa para enseñar y aprender activamente

Este número de Reflexiones Pedagógicas busca presentar los proyectos finales integradores (PFI) como una opción de enseñanza y aprendizaje activo. Se explica qué son los PFI, así como las ventajas que se obtienen al hacer uso de estos en una o más asignaturas. Por otro lado, se relatan las experiencias que el programa de Ingeniería Biomédica ha encontrado en la implementación de PFI en algunas de sus asignaturas. Por último, se exponen algunos retos y desafíos inherentes a la implementación de esta alternativa pedagógica. Esperamos que lo compartido en este número sea de utilidad para continuar en la ruta del aprendizaje activo y significativo, el cual implica retos tanto para los docentes como para los estudiantes. Luego de lo vivido como equipo de profesores, consideramos que esta experiencia es altamente transferible a otros campos de conocimiento. Los resultados son gratificantes, así lo hemos evidenciado en cada momento con los estudiantes

Assessment of Neuromuscular Fatigue 24 Hours After a Futsal Simulated Protocol in University Athletes

International Journal of Exercise Science 16(1): 205-216, 2023. The purpose of this study was to identify changes in neuromuscular performance variables evaluated through the countermovement jump test before and after (0 hours, after session and 24h post) of a simulated futsal protocol in young university female athletes. Fourteen eumenorrheic, healthy and experienced female futsal players were randomly assigned to an intervention group n = 7) or a control group (n = 7). Both groups performed three countermovement jumps before and after the protocol using an inertial system device. The intervention group completed a short-term functional agility and fatigue protocol that simulated the characteristics of futsal, while the control group did not perform any exercise. The results showed a reduction in peak flight time (p = 0.049; d = 0.586), peak concentric work (p = 0.03; d = 1.819) and peak maximum force (p = 0.02; d = 0.782) comparing experimental and control group. No changes in other variables examined were noted between conditions (p \u3e 0.05). These findings indicate that the changes in neuromuscular performance variables, evaluated through a simulated protocol, are established as determinants in the definition of peripheral fatigue in futsal practitioners until 24 h after a demanding intervention

One-year outcomes of coronary artery bypass graft surgery versus percutaneous coronary intervention with multiple stenting for multisystem disease: A meta-analysis of individual patient data from randomized clinical trials

BackgroundWe aimed to provide a quantitative analysis of the 1-year clinical outcomes of patients with multisystem coronary artery disease who were included in recent randomized trials of percutaneous coronary intervention with multiple stenting versus coronary artery bypass graft surgery.MethodsAn individual patient database was composed of 4 trials (Arterial Revascularization Therapies Study, Stent or Surgery Trial, Argentine Randomized Trial of Percutaneous Transluminal Coronary Angioplasty Versus Coronary Artery Bypass Surgery in Multivessel Disease 2, and Medicine, Angioplasty, or Surgery Study 2) that compared percutaneous coronary intervention with multiple stenting (N = 1518) versus coronary artery bypass graft surgery (N = 1533). The primary clinical end point of this study was the combined incidence of death, myocardial infarction, and stroke at 1 year after randomization. Secondary combined end points included the incidence of repeat revascularization at 1 year. All analyses were based on the intention-to-treat principle.ResultsAfter 1 year of follow-up, 8.7% of patients randomized to percutaneous coronary intervention with multiple stenting versus 9.1% of patients randomized to coronary artery bypass graft surgery reached the primary clinical end point (hazard ratio 0.95 and 95% confidence interval 0.74’1.2). Repeat revascularization procedures occurred more frequently in patients allocated to percutaneous coronary intervention with multiple stenting compared with coronary artery bypass graft surgery (18% vs 4.4%; hazard ratio 4.4 and 95% confidence interval 3.3’5.9). The percentage of patients who were free from angina was slightly lower after percutaneous coronary intervention with multiple stenting than after coronary artery bypass graft surgery (77% vs 82%; P = .002).ConclusionsOne year after the initial procedure, percutaneous coronary intervention with multiple stenting and coronary artery bypass graft surgery provided a similar degree of protection against death, myocardial infarction, or stroke for patients with multisystem disease. Repeat revascularization procedures remain high after percutaneous coronary intervention, but the difference with coronary artery bypass graft surgery has narrowed in the era of stenting

Semantic bias, homograph comprehension, and event-related potentials in schizophrenia

Objectives: It is controversial whether a semantic processing bias for strong associates is present in schizophrenia, and unknown whether the language abnormalities observed in schizophrenia can be attributed to dysfunctions early or late in cognitive processing. Combined behavioral and event-related potential (ERP) data can indicate the nature and timing of such abnormalities. Methods: Sensibility judgements of dominant and subordinate homograph sentences were measured in 12 schizophrenia patients and 13 normal controls. ERPs were recorded to the disambiguating sentence-ending word. Results: All subjects showed greatest misinterpretation of subordinate homograph sentences, but schizophrenia patients particularly misinterpreted these sentence types. For control subjects, subordinate homograph sentences that were classified as nonsensical showed greater N400 than those classified as sensible. By contrast, the N400 of patients was large, regardless of the sensibility judgement – patients’ brains initially responded to all subordinate sentences as if nonsensical. These data are consonant with a semantic bias. However, the patients’ N400 to dominant homograph sentence endings was also larger than that of controls, a finding not consonant with a semantic bias. Conclusions: The behavioral results indicate a selective comprehension abnormality in schizophrenia dependent on the content of verbal memory. The ERP results suggest a pervasive contextual memory failure. A semantic activation decay model is proposed to explain these results

Fluorescent biomarkers demonstrate prospects for spreadable vaccines to control disease transmission in wild bats

Vaccines that autonomously transfer among individuals have been proposed as a strategy to control infectious diseases within inaccessible wildlife populations. However, rates of vaccine spread and epidemiological efficacy in real-world systems remain elusive. Here, we investigate whether topical vaccines that transfer among individuals through social contacts can control vampire bat rabies—a medically and economically important zoonosis in Latin America. Field experiments in three Peruvian bat colonies, which used fluorescent biomarkers as a proxy for the bat-to-bat transfer and ingestion of an oral vaccine, revealed that vaccine transfer would increase population-level immunity up to 2.6 times beyond the same effort using conventional, non-spreadable vaccines. Mathematical models showed that observed levels of vaccine transfer would reduce the probability, size and duration of rabies outbreaks, even at low but realistically achievable levels of vaccine application. Models further predicted that existing vaccines provide substantial advantages over culling bats—the policy currently implemented in North, Central and South America. Linking field studies with biomarkers to mathematical models can inform how spreadable vaccines may combat pathogens of health and conservation concern before costly investments in vaccine design and testing