Sergio Alvarado

ORCID: 0000-0001-6111-7550
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About
Contact & Profiles
Research Areas
  • Media and Digital Communication
  • Cultural and political discourse analysis
  • Communication and COVID-19 Impact
  • Advertising and Communication Studies
  • Trypanosoma species research and implications
  • Political Dynamics in Latin America
  • Air Quality and Health Impacts
  • Wildlife Ecology and Conservation
  • Air Quality Monitoring and Forecasting
  • Species Distribution and Climate Change
  • Social Media and Politics
  • Animal Ecology and Behavior Studies
  • Pain Mechanisms and Treatments
  • Architecture, Art, Education
  • Public Policy and Governance
  • Indigenous Studies and Ecology
  • Social Sciences and Policies
  • Advanced Thermodynamics and Statistical Mechanics
  • Trigeminal Neuralgia and Treatments
  • Environmental Impact and Sustainability
  • Environmental and Cultural Studies in Latin America and Beyond
  • Wildlife-Road Interactions and Conservation
  • Photographic and Visual Arts
  • Avian ecology and behavior
  • Extraction and Separation Processes

Corporación Universitaria Minuto de Dios
2015-2025

University of Tarapacá
2010-2022

University of Chile
2011-2022

Universidad Santo Tomás
2022

Universidad Rey Juan Carlos
2022

Instituto de Salud Pública de Chile
2012-2021

Wildlife Conservation Society United Kingdom
2020

Universitat Autònoma de Barcelona
2010-2016

Baylor Scott & White Health
2014

Catholic University of the Maule
2012

En el marco del giro iconográfico en los estudios sociales, esta investigación indaga perfiles Instagram de Gustavo Petro y Rodolfo Hernández durante la campaña presidencial colombiana 2022. Basados previos, se esperaba observar prácticas negativismo mediático, celebrificación acciones ajustadas a roles específicos. Se llevó cabo un análisis contenido basado una muestra total las 373 publicaciones con más reacciones usuarios. encontraron diferencias significativas según candidato. enmarcó...

10.5294/pacla.2025.28.1.4 article ES cc-by-nc-nd Palabra Clave 2025-02-12

Abstract Background Current South American populations trace their origins mainly to three continental ancestries, i.e. European, Amerindian and African. Individual variation in relative proportions of each these ancestries may be confounded with socio-economic factors due population stratification. Therefore, ancestry is a potential confounder variable that should considered epidemiologic studies public health plans. However, there are few have assessed the current admixed Chilean...

10.1186/s40659-020-00284-5 article EN cc-by Biological Research 2020-04-16

Vector transmission of Trypanosoma cruzi appears to be interrupted in Chile; however, data show increasing incidence Chagas' disease, raising concerns that there may a reemerging problem.To estimate the actual risk changing world it is necessary consider historical vector distribution and correlate this with presence cases climate change.Potential models Triatoma infestans Chagas disease were performed using Maxent, machine-learning method.Climate change play major role reemergence T. Chile....

10.1590/0074-02760170172 article EN cc-by Memórias do Instituto Oswaldo Cruz 2017-12-02

Chagas disease remains highly prevalent in Chile, especially between the regions of Arica and Parinacota, Coquimbo. Since 1999 it is considered that Chile vector transmission was interrupted. Under this premise, epidemiological dynamics should be changing. We analyzed evolution prevalence Chagas' analyzing 64,995 xenodiagnosis performed laboratory Parasitology Faculty Medicine University 1949 2014. The mortalities incidences from databases Ministry Health periods which analyzed. rates...

10.4067/s0716-10182017000200004 article EN Revista chilena de infectología 2017-04-01

This paper presents research data about features of discourses held on Twitter regarding the last presidential campaign in Colombia (2018) based agenda-setting theory. case study had a quantitative approach. The sample includes 62 Trending Topics and 620 tweets that were selected according to criteria relevance influence. A method systematic content analysis was applied gather sources contents messages using SPSS software statistical analysis. Five important findings are highlighted: 1....

10.1080/13216597.2020.1806900 article EN Journal of International Communication 2020-07-02

Studies of the current Chilean population performed using classical genetic markers have established that originated primarily from admixture European people, particularly Spaniards, and Amerindians. A socioeconomic-ethno-genetic cline was soon after conquest. Spaniards born in Spain or Chile occupied highest Socioeconomic Strata, while Amerindians belonged to lowest. The intermediate strata consisted people with different degrees ethnic admixture; larger admixture, higher Level. present...

10.1080/19485565.2021.1879626 article EN Biodemography and Social Biology 2021-04-02

ABSTRACT Glutathione S-tranferases (GST) are multigenic enzymes that have been associated with arsenic metabolism. The objective of this study was to evaluate the relationship between polymorphic variants GST and urinary concentration species in people exposed low levels arsenic. A cross-sectional among 66 nonoccupationally subjects, living city Antofagasta, Chile. Polymorphic were analyzed by polymerase chain reaction (PCR) determined atomic absorption spectrometry. effect on evaluated...

10.1080/19338240903390354 article EN Archives of Environmental & Occupational Health 2010-07-30

The Andean Condor (Vultur gryphus) is a culturally iconic wildlife symbol for the South American Andes, but naturally found at very low population densities, and increasingly threatened. Using Range Wide Priority Setting methodology, we (a group of 38 experts) updated historical range (3,230,061 km2), systematized 9998 distribution points across range, identified geographic areas which there was expert knowledge (66%), including where Condors no longer occur (7%), condors are believed to not...

10.3356/jrr-20-59 article EN Journal of Raptor Research 2021-11-05

El artículo se ocupa de cómo los temas más relevantes para la opinión pública colombiana hicieron presentes en las discusiones y debates acaecidos Twitter durante campaña presidencial 2018. En un primer nivel, analizó el grado correspondencia entre prioritarios ciudadanos según principales encuestas presencia tratamiento axiológico estos a partir datos obtenidos mediante análisis contenido. segundo conjugaron cuantitativos cualitativos que permitieron identificar estructura racionalidad...

10.11144/javeriana.syp39-76.detc article ES cc-by Signo y Pensamiento 2020-12-28

Monk Parakeets are considered one of the most invasive bird species given its unique capacity among psittacines to build their own communal nests. Originally introduced as pets in houses from where they escaped or were released, currently more than 20 countries worldwide. This is case Chile, during 1970s. Between 2016 and 2019 we searched Parakeets’ nests structures Santiago metropolis region. We identified 1458 on 546 trees belonging 34 tree species. Ninety-one percent occupied also...

10.3390/birds3040023 article EN cc-by Birds 2022-10-09

Objectives This study aims to identify the hazard functions that describe occurrence patterns of new and recurrent sick leave (SL) episodes for mental, respiratory, musculoskeletal diagnoses. Methods The data come from a cohort workers in Hospital das Clínicas da Universidade Federal de Minas Gerais, Brazil, including all employees working ≥20 hours per week, whose first employment relation with hospital started between 1 January 2000 31 December 2007 (N=1579). We created 15 samples...

10.5271/sjweh.3276 article EN cc-by Scandinavian Journal of Work Environment & Health 2012-01-27

Bites constitute a public health problem worldwide.To characterize epidemiologically bites by animals happened in the province of Los Andes (2005-2007).Descriptive, retrospective epidemiological study. Studied variables: Bitten person (BP), accident bite, biting animal and bite. It was not feasible to obtain more updated information law patient protection.2,360 BP were assisted emergency unit San Juan de Dios Hospital Rio Blanco clinic. An annual average rate 729 BP/100,000 inhabitants 1.99...

10.4067/s0716-10182017000300002 article EN Revista chilena de infectología 2017-06-01

Evaluar la eficiencia predictiva de modelos estadísticos paramétricos y no para predecir episodios críticos contaminación por material particulado PM10 del día siguiente, que superen en Santiago Chile norma calidad diaria. Una predicción adecuada tales permite a autoridad decretar medidas restrictivas aminoren gravedad episodio, consecuentemente proteger salud comunidad. Se trabajó con las concentraciones registradas una estación asociada red monitorización aire MACAM-2, considerando 152...

10.1016/j.gaceta.2010.07.008 article ES cc-by-nc-nd Gaceta Sanitaria 2010-10-21

The interruption of vector-borne transmission Chagas disease was certified in Chile 1999. Our goal to determine the effects vector on age and spatial distributions risk disease. We analyzed cases by sex between 1989 2017, from notified reports Ministry Health. Bayesian maps were constructed using Besag-York-Mollie model. reported had a mean 45.9 ± 17.6 years. Small changes distribution found among different periods (χ215 = 602.4, p < 0.001). These explained mainly numbers lower than those...

10.1089/vbz.2020.2647 article EN Vector-Borne and Zoonotic Diseases 2020-11-23

Researchers in public health are often interested examining the effect of several exposures on incidence a recurrent event. The aim present study is to assess how well common-baseline hazard models perform estimate multiple presenting an episode event, presence event dependence and when history prior-episodes unknown or not taken into account.Through comprehensive simulation study, using specific-baseline as reference, we evaluate performance by means criteria: bias, mean squared error,...

10.1016/j.gaceta.2016.09.004 article EN cc-by-nc-nd Gaceta Sanitaria 2016-11-16

Diet of Harris' hawks (Parabuteo unicinctus) was analyzed using 94 pellets and 128 remains prey collected during autumn-winter 2006 2007 in Reserva Oasis la Campana, a privately protected coastal area central Chile. Hawks consumed primarily small mammals (69.6% frequency, 88.4% biomass). Although native rodents were most frequently (52.5% frequency), European rabbits (Oryctolagus cuniculus) contributed the biomass (56.9%) diet. Birds second importance (23.2% 10.5% biomass), some insects...

10.1894/n05-gds-03.1 article EN The Southwestern Naturalist 2011-09-01

Here we assess the effect of weather and anthropogenic environmental variables, particularly urbanization, on cystic echinococcosis mortality in Chile from 2001 to 2011 using a nonparametric regression model, multivariate adaptive splines, Poisson nonlinear models. This study integrated data various sources variables. The canine population had greatest influence human during period analyzed. Urbanization among variables temperature precipitation weather-related were main factors related...

10.1089/vbz.2019.2610 article EN Vector-Borne and Zoonotic Diseases 2020-05-30

Anàlisi is a science journal published by the Journalism and Communication Sciences Department of Autonomous University Barcelona (UAB). The has been UAB since 1980. publishes articles in fields communication sciences: journalism, advertising public relations, audiovisual communication, internet, multimedia similar areas, always from social cultural viewpoint following theoretical methodological approaches media studies disciplines. will especially value competitive research projects, with...

10.7238/a.v0i45.1582 article EN cc-by Anàlisi 2012-07-19
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