RSS 1.0Artículos científicos
Producción científica referida principalmente a los artículos cientificos indexadas en bases de datos internacionales con afiliación UPC.
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Efficient selection and evaluation of suppliers: a model for a microenterprise in the textile sector in Lima, Peru(IEEE Computer Society, 2022-02)n Peru, the textile sector has experienced a decline in recent years and generates a significant number of direct and indirect jobs. One of the main causes of this is a destabilized supply chain, and supplier management is one of the main obstacles. To improve the fulfillment of the orders of the companies with their final customers, be competitive and to establish a balance and good agreements with their suppliers in a situation of uncertainty, with this study a supplier management model has been developed. It is based on Supply Chain Reference Model and Supplier Potential Matrix which give the framework to evaluate those suppliers who can help to streamline the supply chain. The success of the study is reflected on savings and time reduction for the procurement process.Acceso abierto
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Infancia y transgresión poética en la obra de Luis Hernández(Pontificia Universidad Católica del Perú (PUCP), 2021-12-15)La infancia representó en el ideario del poeta moderno la avidez de conocimiento, el impulso lúdico-experimental y la conciencia material del arte. Estos rasgos pueden distinguirse en la obra de Luis Hernández, quien, revalorizando la infancia, planteó el ímpetu lúdico y la inocencia como claves de una producción artística original. Identificándose con la pureza de un niño, en un nivel temático, el poeta cuestionó la indolencia y el afán organizativo y alienante de todo autoritarismo. En cuanto al uso de los instrumentos técnico-formales, practicó con ellos tal y como un infante experimenta con sus objetos de juego, explotando sus posibilidades, despreocupado e irreverente. Dicho esto, nuestro objetivo es evidenciar cómo su reinterpretación de la infancia influyó en su cuestionamiento de los procesos de escritura, distribución y recepción de la literatura.Acceso abierto
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Destinatarios y lecturas múltiples de El principe feliz de Oscar Wilde: análisis de la adaptación fílmica de Rupert Everett(Universitat Jaume I, 2022-04-28)En este artículo se presenta el análisis de la película The Happy Prince (2018), escrita, dirigida y protagonizada por Rupert Everett, actor inglés con una amplia carrera wildeana. El filme ha integrado en su narrativa pasajes clave del cuento de 1888 “The Happy Prince”, relatados en inglés y francés por el personaje de Oscar Wilde. Debido a estos cambios de medio y de lengua —traducción intermedial e intersistémica en la terminología de Kaindl (2020)—, la película revela dimensiones sobre las infancias queer no exploradas en investigaciones precedentes en torno a este cuento y sus traducciones. Asimismo, los subtítulos de la película en español muestran cómo la “fosilización” de una decisión traductora de las primeras décadas del siglo xx, que omite la pasión intermasculina, resulta en el síntoma de una manipulación cuando interactúan tres sistemas lingüísticos a la vez en pantalla.Acceso abierto
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Estrategias metodológicas en la educación ambiental. Estudio de caso de un docente de ciencias naturales de una institución educativa pública(Pontificia Universidad Católica del Perú (PUCP), 2022-03)La investigación se enmarca en el enfoque ambiental que deben atender las instituciones educativas ante la urgencia que existe de actuar y asumir compromisos ambientales por amenazas ambientales locales, regionales y globales. Entonces, corresponde al docente aplicar estrategias metodológicas en la formación ambiental. La investigación nos brindará información de las acciones que viene realizando el docente desde su área de aprendizaje y poder identificar las estrategias aplicadas que permitan identificar y analizar un problema ambiental de su entorno para promover conciencia ambiental en los estudiantes.Acceso abierto
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Prevalence and predictors of intention to be vaccinated against COVID-19 in thirteen Latin American and Caribbean countries(Springer Science and Business Media Deutschland GmbH, 2022-01-01)The presence of a significant number of people who do not intend to be vaccinated could negatively impact efforts to control the COVID-19 pandemic. Therefore, this study sought to determine the prevalence of intention to be vaccinated against COVID-19 and associated sociodemographic and psychosocial factors in thirteen countries in Latin America and the Caribbean (LAC). A total of 5510 people from 13 LAC countries participated. Frequencies, percentages, bivariate analyses using chi-square tests, and Poisson regression analysis with robust variance were used. The countries with the highest prevalence of intention to be vaccinated were Brazil (96.94%), Cuba (89.59%), Chile (84.59%), and Mexico (78.33%). On the other hand, the countries with the lowest prevalence were El Salvador (54.01%), Paraguay (55.87%), and Uruguay (56.40%). Prevalence is also reported according to some sociodemographic and health variables. It was found that country, male sex, hours exposed to information about COVID-19, university education, living in an urban area, belief in the animal origin of the virus, perceived likelihood of contracting COVID-19, perceived severity of COVID-19, and concern about infecting others significantly predicted intention to be vaccinated in the 13 LAC countries. While most countries had a high prevalence of intention to be vaccinated, there are still subgroups that have levels of intention that may be insufficient to predict the presence of community immunity. In this sense, knowing the estimates of vaccination intention rates, as well as the associated sociodemographic and psychological factors, can be used to plan actions and interventions that will inform about the safety and benefits of vaccines, as well as strengthen trust in health authorities.Acceso restringido temporalmente
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The Brand-Cause Fit in the Advertising Campaign for Sprite’s #YouAreNotAlone(Springer Science and Business Media Deutschland GmbH, 2022-01-01)Several authors have determined concepts related to the inclusion of social problems in advertising. One of them is brand-cause fit, which refers to the condition in which a brand and a social problem—with which the target audience feels identified—are conceptually united in a single communication proposal. The purpose of this study was to analyze how university students perceive the brand-cause fit as a communication strategy in Sprite's “You Are Not Alone” campaign. A qualitative methodology was adopted and semi-structured interviews were conducted with 24 university students of which 12 belonged to the LGBT community and 12 were heterosexual. The participants positively perceived the brand-cause fit used as an advertising strategy in Sprite's campaign. Not only do they value the fact that brands include social issues and problems in their communication, but they also claim that it is the brands’ responsibility to do so.Acceso restringido temporalmente
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Analysis of symmetrical components and balanced earth faults in distribution transformers(Institute of Electrical and Electronics Engineers Inc., 2022-01-01)The objective of this study is to show the analysis and behavior of symmetrical components and balanced faults in power transformers. Thus, the symmetric component methods solve directly the distribution of voltages and currents, allowing the correct verification of the procedure and the influence of earth circuit faults with the neutral point in distribution transformers. Therefore, the symmetric component analysis procedure has an innovative contribution to the determination of problem solving that solves practical cases and allows to determine the unbalanced failure analysis.Acceso restringido temporalmente
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Recurrent neural networks for deception detection in videos(Springer Science and Business Media Deutschland GmbH, 2022-01-01)Deception detection has always been of subject of interest. After all, determining if a person is telling the truth or not could be detrimental in many real-world cases. Current methods to discern deceptions require expensive equipment that need specialists to read and interpret them. In this article, we carry out an exhaustive comparison between 9 different facial landmark recognition based recurrent deep learning models trained on a recent man-made database used to determine lies, comparing them by accuracy and AUC. We also propose two new metrics that represent the validity of each prediction. The results of a 5-fold cross validation show that out of all the tested models, the Stacked GRU neural model has the highest AUC of.9853 and the highest accuracy of 93.69% between the trained models. Then, a comparison is done between other machine and deep learning methods and our proposed Stacked GRU architecture where the latter surpasses them in the AUC metric. These results indicate that we are not that far away from a future where deception detection could be accessible throughout computers or smart devices.Acceso restringido temporalmente
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Design of green infrastructure for the revaluation of the Ventanilla-Peru wetlands and the protection of the environment(Springer Science and Business Media Deutschland GmbH, 2022-01-01)The purpose of this research is the design of a green infrastructure that allows a regional conservation area to revalue the Ventanilla wetlands to promote ecotourism through spaces for the conservation of natural resources, turning it into a tourist attraction. The proposal considers design and construction criteria with adequate technology, biodegradable, and sustainable materials where environmental impact is minimized in this context. The collection of information through field visits and the use of different software for the topographic survey. Results show that the infrastructure design proposed was validated by a survey of potential users of the place, with 75% of the interviewees agreeing with the design proposal that allows interaction and harmony with nature, giving it a landscape value, generating local, national, and international visitors. The value is in the ecosystem services that the landscape provides to the city due to the design and construction criteria with adequate technology, biodegradable, and sustainable materials minimizing the environmental impact and promoting the cultural exchange, preservation, and ecological awareness wetland.Acceso restringido temporalmente
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Utility of TG/HDL-c ratio as a predictor of mortality and cardiovascular disease in patients with chronic kidney disease undergoing hemodialysis: A systematic review(John Wiley and Sons Inc, 2022-04-01)The triglyceride/high-density cholesterol-lipoprotein (TG/HDL-c) is a biomarker of cardiovascular events and mortality. In hemodialysis patients, the evidence is controversial. A systematic review was carried out in the Medline, Scopus, Embase, Web of Science, and Pubmed databases to identify the relevant cohort studies on cardiovascular events and mortality in hemodialysis patients the role of TG/HDL-c as a risk factor. Four cohort-type studies were evaluated, with a total of 52,579 hemodialysis patients. Three studies conducted in Asian populations and one study in the United States had the highest percentage of the sample (50,673 patients). The elevated TG/HDL-c ratio is associated with better survival, and there is a consistent gradual inverse association between TG/HDL-c and mortality in all analysis subgroups. In the decile categorization of the exposure variable, a 21% decrease in the risk of cardiovascular mortality and a 15% decrease in all-cause mortality in the highest decile compared to the reference group (D10 aHR = 0.79; 95% CI: 0.69–0.91 and D10 aHR = 0.85; 95%CI: 0.78–0.92). Our results show that the TG/HDL-c ratio is a protective factor for cardiovascular outcomes and mortality in the American population and a risk factor for them in the population from Asia.Acceso restringido temporalmente
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Spanish version of Jenkins Sleep Scale in physicians and nurses: psychometric properties from a Peruvian nationally representative sample(Elsevier Inc., 2022-06-01)Objective: To evaluate the psychometric properties of the Spanish version of Jenkins Sleep Scale with 4 items (JSS-4) of the Peruvian health system's (PHS) nurses and physicians. Methods: We carried out a psychometric study based on secondary analysis in a sample from a nationally representative survey that used acomplex sampling design. The participants were physicians and nurses aged 18–65 years, working in PHS private and public facilities, who have fulfilled all JSS-4 items. We performed a confirmatory factor analysis. Reliability was evaluated via two estimates - classic alpha (α) and categorical omega (ω) coefficients. Also, we tested the invariance across groups of variables. The convergent validity was evaluated based on the relation between JSS-4 and PHQ-2 using Pearson's correlation coefficient and effect size (Cohen's d). Also, we designed normative values based on percentiles. Results: We included 2100 physicians and 2826 nurses in the analysis. We observed that the unidimensional model has adequate goodness-of-fit indices and values of α and ω coefficients. No measurement invariance was found between the groups of professionals and age groups; however, invariance was achieved between sex, monthly income, work-related illness, and chronic illness groups. Regarding the relation with other variables, the JSS-4 has a small correlation with PHQ-2. Also, profession and age-specific normative values were proposed. Conclusion: JSS-4 Spanish version has adequate psychometric properties in PHS nurses and physicians.Acceso restringido temporalmente
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Psychometric Evidence of the Scale of Risk of Addiction to Social Networks and Internet for Adolescents in Peruvian Students(Aitana Research Group, 2022-01-01)The aim of the study was to analyze the psychometric properties of the Adolescent- Risk of Addiction to Social Networks and Internet Scale (ERA-RSI) in Peruvian students. The sample was composed by 755 students (52.2% women), whose ages ranged from 13 to 24 years (M = 17, SD = 2.93) and attended private schools (62.2%) or universities (33.8%). The internal structure of the ERA-RSI, the invariance according to the level of instruction and sex, its relationship with other variables, and the reliability by internal consistency were analyzed. The results of the Confirmatory Factor Analysis (CFA) indicate a four-dimensional structure with adequate fit indices (χ2 / gl = 3.81, CFI = .91, TLI = .90, RMSEA = .061 [.058, .065], SRMR = .061) and which is invariant according to the level of instruction (school and university) and sex (men and women). In addition, good reliability is shown by internal consistency (ω = .74 to .83). For its part, convergent validity was performed with the Social Media Addiction Questionnaire (ARS) a positive, moderate to strong statistically significant correlation were found between the dimensions of both tests. In conclusion, the present adaptation of the ERA-RSI has, in general, adequate empirical evidence of validity and reliability and can be used in future research.Acceso abierto
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Using functional analytic psychotherapy strategies for supporting latinas victims of interpersonal partner violence(Colegio Oficial de Psicologos, 2022-01-01)Interpersonal partner violence (IPV) is a worldwide public health problem. As a result of IPV, victims report high rates of physical and behavioral disabilities. Help-seeking behaviors are key to obtaining support on facing and managing IPV. Cultural practices such as machismo, marianismo, and familismo are related to keeping quiet and remaining in an abusive relationship in Latinas. Difficulties in sharing emotions, setting interpersonal boundaries, and communicating needs are also behavioral barriers to seeking help in this population. All these factors are associated with social disconnection which reduces victims’ chances of obtaining support in risky situations. Although several programs have been developed for helping victims of IPV, more evidence on adaptions to particular cultural and interpersonal struggles faced by Latinas’ victims is needed. Functional Analytic Psychotherapy (FAP) proposes that therapeutic relationships based on intimacy can help victims of IPV to identify characteristics of those relationships that provide help when they need it. In this theoretical article, several FAP-based strategies aid therapists working with Latinas’ victims of IPV in strengthening clients’ interpersonal functioning and defeating cultural barriers when seeking help.Acceso abierto
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Addiction to social networks and emotional intelligence in technical higher education students(Instituto de Investigacion de Drogodependencias, 2022-01-01)Introduction. Social networks are used by around 3,600 million people, they facilitate communication and promote human ties; but its inappropriate use could cause problems and extreme addiction. Objective: Relate addiction to social networks and emotional intelligence. Method: Correlational study, 279 students of technical-superior level participated; The Social Media Addiction Questionnaire (ARS) and the Wong-Law Emotional Intelligence Scale (EI) were administered. Results: Obsession (ARS) negatively correlates with Use of one’s own emotions and Regulation of emotions; likewise, Lack of control and Excessive use (ARS) with the dimensions Valuation of one’s own emotions, Use of one’s own emotions and Regulation of emotions; but, no factor of the ARS correlates with Valuation of the Emotions of the others; Likewise, men and women do not differ in the ARS, those who have more hours of connection are more likely to show higher scores in network addiction; and, in terms of emotional intelligence, women value the emotions of others more. Conclusions: Addiction to social networks and emotional intelligence are negatively related in almost all their dimensions, but it is an association of low magnitudes.Acceso abierto
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Comparison between chronological and dental ages according to three estimation methods in a Peruvian population(Instituto de Investigaciones Clinicas, 2022-01-01)Dental age estimation techniques have great importance in dental evaluation, specifically in the orthodontic, academic, and forensic areas. The aim of this study was to compare the dental age according to the Demirjian, Nolla and Cameriere methods with the chronological age in a Peruvian population. This is an observational, descriptive, retrospective and cross-sectional study, which had a total population of 578 panoramic radiographs of subjects aged 6 to 14 years, where the difference in means from a previous study was calculated, and 193 subjects were finally randomly selected. The chronological ages (CA) and dental ages (DA) were compared using the Wilcoxon and Kruskall Wallis Range Tests. The means were 8.77 ± 2.34 and 8.90 ± 2.04 years of the CA for the female and male genders, respectively. The difference in means of the CA and DA according to the Nolla, Demirjian and Cameriere methods were-0.38, 0.96 and-0.21 years, respectively, for the total study sample. A positive correlation was found for the three methods studied; however, the Demirjian method showed a statistically significant difference with an underestimation of-0.91 years in the total sample. Also, the method of Cameriere was the closest to the chronological age.Acceso abierto
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Analysis of the distribution of macronutrients of food baskets delivered by municipalities during the Covid-19 pandemic in Peru(Instituto Nacional de Salud, 2022-01-01)Objectives. Evaluate and compare the macronutrient distribution of the food baskets delivered by Peruvian municipalities during the COVID-19 pandemic according to the geographic domain and assigned budget level. Materials and methods. Secondary analysis of the database “Consultation of Acquisition and distribution of basic necessities of the basic family basket” of the General Comptroller of the Republic. Stratified probability sampling was carried out. The distribution of caloric intake was calculated according to macronutrients and compared with the Acceptable Intervals of Macronutrient Distribution (IADM) of the Institute of Nutrition of Central America and Panama (INCAP) and the National Institute of Civil Defense (INDECI). Results. At the national level, the median caloric intake of proteins was 7.7%; carbohydrates 62.5%; and fats 28.1%. The proportion of municipalities with a protein deficit was 84%; Municipalities with excess carbohydrates ranged from 16.5% (according to INCAP) to 35.9% (according to INDECI), and with excess fat, it was 61.6% (according to INCAP) and 20.2% (according to INDECI). According to INDECI, nationally only 9.2% of municipalities delivered baskets with an adequate distribution of macronutrients; Metropolitan Lima stands out with the highest proportions of adequate baskets, while in the Jungle this percentage was less than 5%. Conclusions. Most of the baskets delivered did not have adequate macronutrient distribution. Especially the baskets of municipalities outside of Metropolitan Lima or that had a smaller budget. Carbohydrates and fats were the nutrients that were included in excess, while proteins were deficient.Acceso abierto
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Detection of SARS-CoV-2 antibodies in febrile patients from an endemic region of dengue and chikungunya in Peru(Public Library of Science, 2022-04-01)Introduction The rapid expansion of the novel SARS-CoV-2 virus has raised serious public health concerns due to the possibility of misdiagnosis in regions where arboviral diseases are endemic. We performed the first study in northern Peru to describe the detection of SARSCoV-2 IgM antibodies in febrile patients with a suspected diagnosis of dengue and chikungunya fever. Materials and methods A consecutive cross-sectional study was performed in febrile patients attending primary healthcare centers from April 2020 through March 2021. Patients enrolled underwent serum sample collection for the molecular and serological detection of DENV and CHIKV. Also, serological detection of IgM antibodies against SARS-CoV-2 was performed. Results 464 patients were included during the study period, of which (40.51%) were positive for one pathogen, meanwhile (6.90%) presented co-infections between 2 or more pathogens. The majority of patients with monoinfections were positive for SARS-CoV-2 IgM with (73.40%), followed by DENV 18.09% and CHIKV (8.51%). The most frequent co-infection was DENV + SARS-CoV-2 with (65.63%), followed by DENV + CHIKV and DENV + CHIKV + SARSCoV-2, both with (12.50%). The presence of polyarthralgias in hands (43.75%, p<0.01) and feet (31.25%, p = 0.05) were more frequently reported in patients with CHIKV monoinfection. Also, conjunctivitis was more common in patients positive for SARS-CoV-2 IgM (11.45%, p<0.01). The rest of the symptoms were similar among all the study groups. Conclusion SARS-CoV-2 IgM antibodies were frequently detected in acute sera from febrile patients with a clinical suspicion of arboviral disease. The presence of polyarthralgias in hands and feet may be suggestive of CHIKV infection. These results reaffirm the need to consider SARS-CoV-2 infection as a main differential diagnosis of acute febrile illness in arboviruses endemic areas, as well as to consider co-infections between these pathogens. Copyright:Acceso abierto
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Using machine learning to identify important predictors of COVID-19 infection prevention behaviors during the early phase of the pandemic(Cell Press, 2022-04-08)Before vaccines for coronavirus disease 2019 (COVID-19) became available, a set of infection-prevention behaviors constituted the primary means to mitigate the virus spread. Our study aimed to identify important predictors of this set of behaviors. Whereas social and health psychological theories suggest a limited set of predictors, machine-learning analyses can identify correlates from a larger pool of candidate predictors. We used random forests to rank 115 candidate correlates of infection-prevention behavior in 56,072 participants across 28 countries, administered in March to May 2020. The machine-learning model predicted 52% of the variance in infection-prevention behavior in a separate test sample—exceeding the performance of psychological models of health behavior. Results indicated the two most important predictors related to individual-level injunctive norms. Illustrating how data-driven methods can complement theory, some of the most important predictors were not derived from theories of health behavior—and some theoretically derived predictors were relatively unimportant.Acceso abierto
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Diagnosis of a duodenal-colonic cyst with inflammatory content derived of a metastatic gallbladder adenocarcinoma: a case report(Permanyer Publications, 2022-03-01)The existence of a cystic mass which walls originated from a metastatic gallbladder adenocarcinoma is infrequent. We present the case of 68-year-old male that present to the emergency department with abdominal distention, hyporexia and jaundice. Upon exploratory laparotomy, a duodeno-colonic cyst with walls formed by metastatic cells derived from a Gallbladder Adenocarcinoma. Metastatic disease from a gallbladder adenocarcinoma to transverse colon and duodenum formed adherences between both organs, leading to the formation of cystic mass. Cancer cells have multiple adaptation mechanisms in order to survive harsh environments.Acceso abierto
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Depression symptoms and mortality in elderly peruvian navy veterans: a retrospective cohort study(Pleiades journals, 2022-03-01)Abstract: Our study was design to determine the association between depressive symptoms and mortality in adults over 60 years old Navy Peruvian Veterans. We performed a retrospective cohort study based on a previous cohort study. A total of 1681 patients over 60 years old were included between 2010–2015. Demographic information, self-reported information about falls, physical frailty assessment, tobacco consumption, hypertension, Type 2 Diabetes Mellitus, Chronic Obstructive Pulmonary Disease and was collected. Depression was assessed by the short form of the Geriatric Depression Scale. We found that depressive symptoms were present in 24.9% of the participants and 40.5% of them died. Mortality risk in patients with depressive symptoms, physical frailty, and male sex was: RR of 23.1 (95% CI: 11.7–45.7), 3.84 (95% CI: 2.16–6.82), and 1.37 (95% CI: 1.07–1.75) respectively. We concluded that depressive symptoms in Peruvian retired military personnel and their immediate relatives are high and are significatively associated with mortality. Also, being male and frail was associated with an increased risk of death. This reinforces that early detection and assessment of depressive symptoms could be an opportunity to improve the health status of older adults.Acceso abierto
