High-angular-sensitivity X-ray phase-contrast microtomography of soft tissue through a two-directional beam-tracking synchrotron set-up.

Two-directional beam-tracking (2DBT) is a method for phase-contrast imaging and tomography that uses an intensity modulator to structure the X-ray beam into an array of independent circular beamlets that are resolved by a high-resolution detector. It features isotropic spatial resolution, provides two-dimensional phase sensitivity, and enables the three-dimensional reconstructions of the refractive index decrement, δ, and the attenuation coefficient, µ. In this work, the angular sensitivity and the spatial resolution of 2DBT images in a synchrotron-based implementation is reported. In its best configuration, angular sensitivities of ∼20 nrad and spatial resolution of at least 6.25 µm in phase-contrast images were obtained. Exemplar application to the three-dimensional imaging of soft tissue samples, including a mouse liver and a decellularized porcine dermis, is also demonstrated.

Identification of Olives Using In-Field Hyperspectral Imaging with Lightweight Models.

During the growing season, olives progress through nine different phenological stages, starting with bud development and ending with senescence. During their lifespan, olives undergo changes in their external color and chemical properties. To tackle these properties, we used hyperspectral imaging during the growing season of the olives. The objective of this study was to develop a lightweight model capable of identifying olives in the hyperspectral images using their spectral information. To achieve this goal, we utilized the hyperspectral imaging of olives while they were still on the tree and conducted this process throughout the entire growing season directly in the field without artificial light sources. The images were taken on-site every week from 9:00 to 11:00 a.m. UTC to avoid light saturation and glitters. The data were analyzed using training and testing classifiers, including Decision Tree, Logistic Regression, Random Forest, and Support Vector Machine on labeled datasets. The Logistic Regression model showed the best balance between classification success rate, size, and inference time, achieving a 98% F1-score with less than 1 KB in parameters. A reduction in size was achieved by analyzing the wavelengths that were critical in the decision making, reducing the dimensionality of the hypercube. So, with this novel model, olives in a hyperspectral image can be identified during the season, providing data to enhance a farmer's decision-making process through further automatic applications.

New Psychometric Evidence of the Grief Impairment Scale (GIS) in People Who Have Experienced the Death of a Loved One From a Network Psychometric Approach in Two Latin American Countries.

This study aimed to evaluate the psychometric properties of the Grief Impairment Scale (GIS) using a network psychometric model. A total of 1048 individuals from Peru and El Salvador participated. A network psychometric model was used to determine internal structure, reliability, and cross-country invariance. The results indicate that the GIS items were grouped into a single network structure through Exploratory Graph Analysis. Reliability was estimated by structural consistency, and it was found that when replicating the network structure within an empirical dimension, a single network structure was consistently obtained, and all items remained stable. Furthermore, the network structure was invariant, thus functioning similarly across the different country groups. In conclusion, the GIS presented solid psychometric evidence of validity based on its internal structure, reliability, and cross-country invariance. Therefore, the GIS is a psychometrically sound measure of functional impairment symptoms due to grief for Peruvian and Salvadoran individuals.

An Electronic Structure Investigation of PEDOT with AlCl4- Anions-A Promising Redox Combination for Energy Storage Applications.

In this work, we use density functional theory to investigate the electronic structure of poly(3,4-ethylenedioxythiophene) (PEDOT) oligomers with co-located AlCl4- anions, a promising combination for energy storage. The 1980s bipolaron model remains the dominant interpretation of the electronic structure of PEDOT despite recent theoretical progress that has provided new definitions of bipolarons and polarons. By considering the influence of oligomer length, oxidation or anion concentration and spin state, we find no evidence for many of the assertions of the 1980s bipolaron model and so further contribute to a new understanding. No self-localisation of positive charges in PEDOT is found, as predicted by the bipolaron model at the hybrid functional level. Instead, our results show distortions that exhibit a single or a double peak in bond length alternations and charge density. Either can occur at different oxidation or anion concentrations. Rather than representing bipolarons or polaron pairs in the original model, these are electron distributions driven by a range of factors. Distortions can span an arbitrary number of nearby anions. We also contribute a novel conductivity hypothesis. Conductivity in conducting polymers has been observed to reduce at anion concentrations above 0.5. We show that at high anion concentrations, the energy of the localised, non-bonding anionic orbitals approaches that of the system HOMO due to Coulombic repulsion between anions. We hypothesize that with nucleic motion in the macropolymer, these orbitals will interfere with the hopping of charge carriers between sites of similar energy, lowering conductivity.

Scalable Large-Area 2D-MoS2/Silicon-Nanowire Heterostructures for Enhancing Energy Storage Applications.

Two-dimensional (2D) transition-metal dichalcogenides have shown great potential for energy storage applications owing to their interlayer spacing, large surface area-to-volume ratio, superior electrical properties, and chemical compatibility. Further, increasing the surface area of such materials can lead to enhanced electrical, chemical, and optical response for energy storage and generation applications. Vertical silicon nanowires (SiNWs), also known as black-Si, are an ideal substrate for 2D material growth to produce high surface-area heterostructures, owing to their ultrahigh aspect ratio. Achieving this using an industrially scalable method paves the way for next-generation energy storage devices, enabling them to enter commercialization. This work demonstrates large surface area, commercially scalable, hybrid MoS2/SiNW heterostructures, as confirmed by Raman spectroscopy, with high tunability of the MoS2 layers down to the monolayer scale and conformal MoS2 growth, parallel to the silicon nanowires, as verified by transmission electron microscopy (TEM). This has been achieved using a two-step atomic layer deposition (ALD) process, allowing MoS2 to be grown directly onto the silicon nanowires without any damage to the substrate. The ALD cycle number accurately defines the layer number from monolayer to bulk. Introducing an ALD alumina (Al2O3) interface at the MoS2/SiNW boundary results in enhanced MoS2 quality and uniformity, demonstrated by an order of magnitude reduction in the B/A exciton photoluminescence (PL) intensity ratio to 0.3 and a reduction of the corresponding layer number. This high-quality layered growth on alumina can be utilized in applications such as for interfacial layers in high-capacity batteries or for photocathodes for water splitting. The alumina-free 100 ALD cycle heterostructures demonstrated no diminishing quality effects, lending themselves well to applications that require direct electrical contact with silicon and benefit from more layers, such as electrodes for high-capacity ion batteries.

Source-Specific Air Pollution and Loss of Independence in Older Adults Across the US.

Importance: Air pollution is a recognized risk factor associated with chronic diseases, including respiratory and cardiovascular conditions, which can lead to physical and cognitive impairments in later life. Although these losses of function, individually or in combination, reduce individuals' likelihood of living independently, little is known about the association of air pollution with this critical outcome. Objective: To investigate associations between air pollution and loss of independence in later life. Design, Setting, and Participants: This cohort study was conducted as part of the Environmental Predictors Of Cognitive Health and Aging study and used 1998 to 2016 data from the Health and Retirement Study. Participants included respondents from this nationally representative, population-based cohort who were older than 50 years and had not previously reported a loss of independence. Analyses were performed from August 31 to October 15, 2023. Exposures: Mean 10-year pollutant concentrations (particulate matter less than 2.5 µm in diameter [PM2.5] or ranging from 2.5 µm to 10 µm in diameter [PM10-2.5], nitrogen dioxide [NO2], and ozone [O3]) were estimated at respondent addresses using spatiotemporal models along with PM2.5 levels from 9 emission sources. Main Outcomes and Measures: Loss of independence was defined as newly receiving care for at least 1 activity of daily living or instrumental activity of daily living due to health and memory problems or moving to a nursing home. Associations were estimated with generalized estimating equation regression adjusting for potential confounders. Results: Among 25 314 respondents older than 50 years (mean [SD] baseline age, 61.1 [9.4] years; 11 208 male [44.3%]), 9985 individuals (39.4%) experienced lost independence during a mean (SD) follow-up of 10.2 (5.5) years. Higher exposure levels of mean concentration were associated with increased risks of lost independence for total PM2.5 levels (risk ratio [RR] per 1-IQR of 10-year mean, 1.05; 95% CI, 1.01-1.10), PM2.5 levels from road traffic (RR per 1-IQR of 10-year mean, 1.09; 95% CI, 1.03-1.16) and nonroad traffic (RR per 1-IQR of 10-year mean, 1.13; 95% CI, 1.03-1.24), and NO2 levels (RR per 1-IQR of 10-year mean, 1.05; 95% CI, 1.01-1.08). Compared with other sources, traffic-generated pollutants were most consistently and robustly associated with loss of independence; only road traffic-related PM2.5 levels remained associated with increased risk after adjustment for PM2.5 from other sources (RR per 1-IQR increase in 10-year mean concentration, 1.10; 95% CI, 1.00-1.21). Other pollutant-outcome associations were null, except for O3 levels, which were associated with lower risks of lost independence (RR per 1-IQR increase in 10-year mean concentration, 0.94; 95% CI, 0.92-0.97). Conclusions and Relevance: This study found that long-term exposure to air pollution was associated with the need for help for lost independence in later life, with especially large and consistent increases in risk for pollution generated by traffic-related sources. These findings suggest that controlling air pollution could be associated with diversion or delay of the need for care and prolonged ability to live independently.

Does Bone Morphogenetic Protein Use Reduce Pseudarthrosis Rates in Single-Level Transforaminal Lumbar Interbody Fusion Surgeries?

BACKGROUND: Recombinant human bone morphogenetic protein 2 (rhBMP-2, or BMP for short) is a popular biological product used in spine surgeries to promote fusion and avoid the morbidity associated with iliac crest autograft. BMP's effect on pseudarthrosis in transforaminal lumbar interbody fusion (TLIF) remains unknown. OBJECTIVE: To assess the rates of pseudarthrosis in single-level TLIF with and without concurrent use of BMP. METHODS: This was a retrospective cohort study conducted at a single academic institution. Adults undergoing primary single-level TLIF with a minimum of 1 year of clinical and radiographic follow-up were included. BMP use was determined by operative notes at index surgery. Non-BMP cases with iliac crest bone graft were excluded. Pseudarthrosis was determined using radiographic and clinical evaluation. Bivariate differences between groups were assessed by independent t test and χ 2 analyses, and perioperative characteristics were analyzed by multiple logistic regression. RESULTS: One hundred forty-eight single-level TLIF patients were included. The mean age was 59.3 years, and 52.0% were women. There were no demographic differences between patients who received BMP and those who did not. Pseudarthrosis rates in patients treated with BMP were 6.2% vs 7.5% in the no BMP group (P = 0.756). There was no difference in reoperation for pseudarthrosis between patients who received BMP (3.7%) vs those who did not receive BMP (7.5%, P = 0.314). Patients who underwent revision surgery for pseudarthrosis more commonly had diabetes with end-organ damage (revised 37.5% vs not revised 1.4%, P < 0.001). Multiple logistic regression analysis demonstrated no reduction in reoperation for pseudarthrosis related to BMP use (OR 0.2, 95% CI 0.1-3.7, P = 0.269). Diabetes with end-organ damage (OR 112.6,95% CI 5.7-2225.8, P = 0.002) increased the risk of reoperation for pseudarthrosis. CONCLUSIONS: BMP use did not reduce the rate of pseudarthrosis or the number of reoperations for pseudarthrosis in single-level TLIFs. Diabetes with end-organ damage was a significant risk factor for pseudarthrosis. CLINICAL RELEVANCE: BMP is frequently used "off-label" in transforaminal lumbar interbody fusion; however, little data exists to demonstrate its safety and efficacy in this procedure.

Size-Dependence and High Temperature Stability of Radial Vortex Magnetic Textures Imprinted by Superconductor Stray Fields.

Swirling spin textures, including topologically nontrivial states, such as skyrmions, chiral domain walls, and magnetic vortices, have garnered significant attention within the scientific community due to their appeal from both fundamental and applied points of view. However, their creation, controlled manipulation, and stability are typically constrained to certain systems with specific crystallographic symmetries, bulk or interface interactions, and/or a precise stacking sequence of materials. Recently, a new approach has shown potential for the imprint of magnetic radial vortices in soft ferromagnetic compounds making use of the stray field of YBa2Cu3O7-δ superconducting microstructures in ferromagnet/superconductor (FM/SC) hybrids at temperatures below the superconducting transition temperature (TC). Here, we explore the lower size limit for the imprint of magnetic radial vortices in square and disc shaped structures as well as the persistence of these spin textures above TC, with magnetic domains retaining partial memory. Structures with circular geometry and with FM patterned to smaller radius than the superconductor island facilitate the imprinting of magnetic radial vortices and improve their stability above TC, in contrast to square structures where the presence of magnetic domains increases the dipolar energy. Micromagnetic modeling coupled with a SC field model reveals that the stabilization mechanism above TC is mediated by microstructural defects. Superconducting control of swirling spin textures, and their stabilization above the superconducting transition temperature by means of defect engineering holds promising prospects for shaping superconducting spintronics based on magnetic textures.

Pandemic Grief and Suicidal Ideation in Latin American Countries: A Network Analysis.

This study aimed to characterize the network structure of pandemic grief symptoms and suicidal ideation in 2174 people from eight Latin American countries. Pandemic grief and suicidal ideation were measured using the Pandemic Grief Scale and a single item, respectively. Network analysis provides an in-depth characterization of symptom-symptom interactions within mental disorders. The results indicated that, "desire to die," "apathy" and "absence of sense of life" are the most central symptoms in a pandemic grief symptom network; therefore, these symptoms could be focal elements for preventive and treatment efforts. Suicidal ideation, the wish to die, and the absence of meaning in life had the strongest relationship. In general, the network structure did not differ among the participating countries. It identifies specific symptoms within the network that may increase the likelihood of their co-occurrence and is useful at the therapeutic level.

Intention to receive the monkeypox vaccine and its psychological and sociodemographic predictors: a cross-sectional survey in the general population of Peru.

OBJECTIVE: The objective of this study was to identify predictors of intention to be vaccinated against Monkeypox (Mpox) in a sample of Peruvian citizens.  METHODS: A set of sociodemographic and psychological predictors were used, such as sex, sexual orientation, educational level, previous diagnosis of COVID-19, marital status, complete vaccination against COVID-19, employment status, living with vulnerable people, presence of chronic disease, area of residence, perceived usefulness of COVID-19 vaccines, fear of Mpox, conspiracy beliefs about Mpox, among others. A total of 472 Peruvian adults participated, selected by non-probabilistic snowball convenience sampling. A sociodemographic survey, the Mpox Fear Scale, was used. Conspiracy Beliefs about Mpox was assessed using three questions created specifically for this study. For inferential purposes, simple ordinal regressions ("crude models") were performed between each factor and the outcome.  RESULTS: Regarding their intention to be vaccinated against Mpox, more than 60% expressed clear approval. Being non-heterosexual, having greater emotional fear of Mpox, and perceiving some potential for this disease to become the next pandemic were related to greater intention to vaccinate. On the other hand, being older, having low perceived usefulness of COVID-19 vaccines, and having higher conspiracy beliefs about Mpox were associated with lower intention to vaccinate.  CONCLUSION: The study provides initial information for future research seeking to better analyze Mpox vaccination intention. In addition, cross-sectional data are provided that can be used to develop public health policies that target subgroups with low prevalence of intention to vaccinate against Mpox.

El trasplante de córnea en Villa Clara: diez años transcurridos de la primera intervención quirúrgica / Corneal transplantation in Villa Clara: after ten years the first surgical intervention

Introducción: La córnea constituye el elemento más importante del sistema óptico, al ser el primer medio transparente del ojo; tiene la finalidad de mejorar la calidad de la imagen que se forma en la retina, por lo que su transparencia es imprescindible para poder obtener una buena agudeza visual. Cuando sus capas están afectadas por diferentes enfermedades, se requiere sustituir este tejido dañado; este procedimiento, denominado trasplante de córnea o queratoplastia, tiene diferentes finalidades. Objetivo: Caracterizar los resultados de la cirugía de trasplante de córnea tras diez años del primer procedimiento quirúrgico en la provincia de Villa Clara. Métodos: Se realizó un estudio observacional descriptivo longitudinal retrospectivo, con una muestra de 204 pacientes operados de trasplante de córnea en el Hospital Universitario Clínico-Quirúrgico «Arnaldo Milián Castro» de Villa Clara, en el período comprendido entre 2008 y 2018. Las variables estudiadas fueron: sexo, finalidad del procedimiento, diagnóstico y complicaciones. Resultados: Predominó el sexo masculino (53,4 %); la finalidad más frecuente del trasplante tuvo fines ópticos (85,8 %); principal diagnóstico: la queratopatía bullosa (42,7 %); dentro de las complicaciones más frecuentes estuvieron: el rechazo al injerto, el defecto epitelial y el glaucoma secundario. Conclusiones: La cirugía de trasplante de córnea en la provincia de Villa Clara significa un gran avance en el desarrollo y perfeccionamiento para el tratamiento de múltiples afecciones corneales. Los diagnósticos más frecuentes fueron: la queratopatía bullosa y las opacidades corneales; las complicaciones más frecuentes, el rechazo al injerto, la aparición de defectos epiteliales y el glaucoma secundario.

Introduction: the cornea constitutes the most important element of the optical system, being the first transparent medium of the eye; its purpose is to improve the quality of the image that is formed on the retina, so its transparency is essential to obtain good visual acuity. When its layers are affected by different diseases, it is required to replace this damaged tissue; this procedure called cornea transplant or keratoplasty has different purposes. Objective: to characterize the results of corneal transplant surgery ten years after the first surgical procedure in Villa Clara province. Methods: a retrospective, longitudinal, descriptive and observational study was carried out with a sample of 204 patients who underwent corneal transplant surgery at "Arnaldo Milián Castro" Clinical and Surgical University Hospital in Villa Clara between 2008 and 2018. Age, purpose of the procedure, diagnosis and complications were the variables studied. Results: male gender predominated (53.4%); the most frequent purpose of the transplant was for optical purposes (85.8%); bullous keratopathy (42.7%) was the main diagnosis as well as, graft rejection, epithelial defect and secondary glaucoma were among the most frequent complications. Conclusions: corneal transplant surgery in Villa Clara province means a great advance in the development and improvement for the treatment of multiple corneal conditions. The most frequent diagnoses were bullous keratopathy and corneal opacities; graft rejection, the appearance of epithelial defects and secondary glaucoma were the most frequent complications.

Reasons for the use of masks in open areas after the Peruvian government announced that it will no longer be mandatory in the context of COVID-19 in 2022

Introduction: In Peru, a high proportion of fully immunized people against COVID-19 has been achieved, which has mitigated the severity of the disease. Thus, under the recommendation of experts, the Peruvian government issued Supreme Decree 118-2022-PCM, which indicated that the use of masks is optional in open and ventilated enclosed spaces as of October 1, 2022. Objective: The aim of the present study was to find out the reasons why people continued to wear masks even though it was not mandatory in outdoor environments. Methods: A total of 335 people participated, with an average age of 26.11 years (73.1% women). A data collection form was prepared where sociodemographic and health information was requested; in addition, the question "Why do you continue to wear mask despite it being optional in open and closed ventilated spaces?" was included. The data obtained from the last open question of the instrument was analyzed by means of a discursive textual analysis (DTA) and an exploratory analysis through IRAMUTEQ. Results: Results indicate that people continue to wear masks, despite the lifting of the restrictions, to avoid contagion of COVID-19 and other respiratory diseases. In addition, the prevention of possible infection and transmission of the virus also focused on the family and vulnerable people. Discussion: It is concluded that the practice of wearing masks may be influenced by individual perceptions of risk and interpretations of responsibility and solidarity towards others.

Introducción: En el Perú, se logró una alta proporción de personas completamente inmunizados contra COVID-19 que ha mitigado la severidad de la enfermedad. Es así que, bajo la recomendación de expertos el gobierno peruano emitió el Decreto Supremo 118-2022-PCM, donde se indicó que el uso de la mascarilla es opcional en espacios abiertos y espacios cerrados ventilados a partir del 1 de octubre del 2022. Objetivo: El presente estudio fue conocer las razones por las cuales las personas continuaron usando mascarilla a pesar de que no era obligatorio en ambientes exteriores. Metodología: Participaron un total de 335 personas con un promedio de edad de 26.11 años (73.1% mujeres). Se elaboró una ficha de recolección de datos donde se solicitó información sociodemográfica y de salud; además, se incluyó la pregunta "¿por qué sigue utilizando la mascarilla a pesar de que es opcional en espacios abiertos y cerrados ventilados?" Los datos obtenidos de la última pregunta abierta del instrumento se analizaron mediante un análisis textual discursivo (ATD) y un análisis exploratorio a través de IRAMUTEQ. Resultados: Los resultados indicaron que, las personas seguían utilizando mascarillas, a pesar de estar levantadas las restricciones, para evitar contagios de la COVID-19 y de otras enfermedades respiratorias. Además, esta prevención de una posible infección y transmisión del virus es enfocada también a la propia familia y personas vulnerables. Discusión: Se concluye que, la práctica de usar mascarillas puede estar influenciada por las percepciones individuales del riesgo y las interpretaciones de responsabilidad y solidaridad frente a los demás.

Medical Research Trends in Undergraduate Psychological Theses: A report from a South American country

Introduction: Psychological research can be developed by researchers and also by undergraduate or postgraduate students. In an undergraduate level, psychological research is specially challenging due to the limited ability of students to develop coherent and logical research problems and methodological approaches. Objective: The objective of this study is to identify the main research trends in undergraduate psychological theses from Peruvian universities. As a specific objective, quantitative and qualitative research design trends were distinguished. Methods: A descriptive and retrospective systematic review of psychological research thesis of Peruvian undergraduate students was conducted, starting the data extraction process starting with RENATI database for an initial screening phase. Data analysis was conducted in two phases. Results: First, data was organized in relation to its frequency of the categories of authors' sex, the universities were catalogued as universities 1, 2, 3, 4 and 5 according to their ranking, the categories of years of publication, number of authors, designs, type of methodology, and area of publication were obtained. Descriptive frequency statistics were established based on these categories. In the next phase, lexicometric and statistical textual analysis were used to identify research trending topics. Discussion: The main results show that different topics are predominantly framed within the clinical and health psychology line of research, mainly those related to coping styles, psychological stress and wellbeing.

Introducción: La investigación psicológica puede ser desarrollada por investigadores y también por estudiantes de pregrado o posgrado. En un nivel de pregrado, la investigación psicológica es especialmente desafiante debido a la capacidad limitada de los estudiantes para desarrollar problemas de investigación y enfoques metodológicos coherentes y lógicos. Objetivo: El objetivo de este estudio es identificar las principales tendencias de investigación en las tesis de grado en psicología de las universidades peruanas. Como objetivo específico, se distinguieron las tendencias de diseño de investigación cuantitativa y cualitativa. Metodología: Se realizó una revisión sistemática descriptiva y retrospectiva de tesis de investigación en psicología de estudiantes universitarios peruanos, iniciando el proceso de extracción de datos a partir de la base de datos RENATI para una fase inicial de selección. El análisis de datos se realizó en dos fases. Resultados: Primero se organizaron los datos en relación a su frecuencia de las categorías de sexo de los autores, las universidades se catalogaron como universidades 1, 2, 3, 4 y 5 según su ranking, las categorías de años de publicación, número de autores Se obtuvieron diseños, tipo de metodología y área de publicación. A partir de estas categorías se establecieron estadísticos descriptivos de frecuencia. En la siguiente fase, se utilizaron análisis textuales lexicométricos y estadísticos para identificar los temas de tendencia de investigación. Discusión: Los principales resultados muestran que diferentes temas se enmarcan predominantemente dentro de la línea de investigación de la psicología clínica y de la salud, principalmente los relacionados con los estilos de afrontamiento, el estrés psicológico y el bienestar.

Impact of COVID-19 on quality of life in Peruvian older adults: construct validity, reliability and invariance of the COV19-Impact on Quality of Life (COV19-QoL) measurement

Abstract The aim of the present study was to translate into Spanish and evaluate the psychometric evidence of the Impact on Quality of Life (COV19-QoL) applied to a sample of Peruvian older adults ( N = 298; 58.1% women, 41.9% men, mean age 65.34 years [SD = 11.33]). The study used techniques from the Classical Test Theory (CTT) and Item Response Theory (IRT). The findings confirmed the single factor structure of the COV19-QoL, high internal consistency reliability, measurement invariance by gender, and all items demonstrated adequate discrimination and difficulty indices. In this sense, the items allow adequate discrimination between low, medium and high levels of the impact of the COVID-19 pandemic on quality of life. In addition, a greater perceived impact of the pandemic on quality of life is necessary to answer the higher response options of the COV19-QoL. In conclusion, the COV19-QoL is a valid measurement scale of the impact of the COVID-19 pandemic on the quality of life of Peruvian older adults.

Pandemic grief in El Salvador: factors that predict dysfunctional grief due to a COVID-19 death among Salvadoran adults

Abstract Thousands of people have died of COVID-19 in El Salvador. However, little is known about the mental health of those who are mourning the loss of a loved one to COVID-19. Therefore, the objective of this study was to examine the dysfunctional grief associated with COVID-19 death among Salvadoran adults. A sample of 435 Salvadorans ( M = 29 years; SD = 8.75) who lost a family member or loved one to COVID-19 completed a digital survey using the Google Forms platform, during April 2 and 28, 2022. The results revealed that 35.1% reported clinically elevated symptoms of dysfunctional grief and among those mourners, and 25.1% also exhibited clinical levels of coronavirus anxiety. A binary logistic regression revealed that predictor variables such as COVID-19 anxiety ( p = .003), depression ( p = .021), and COVID-19 obsession ( p = .032) were significant ( χ 2 = 84.31; Nagelkerke R 2 = .242) and predict a 24.2% chance of dysfunctional bereavement.

Cross-cultural invariance of the Spanish version of the COVID-19 Assessment Scorecard to measure the perception of government actions against COVID-19 in Latin America

Abstract Objectives The present study aimed to evaluate the measurement invariance of a general measure of the perception of governmental responses to COVID--19 (COVID-SCORE-10) in the general population of 13 Latin American countries. Methods A total of 5780 individuals from 13 Latin American and Caribbean countries selected by non-probabilistic snowball sampling participated. A confirmatory factor analysis was performed and the alignment method was used to evaluate invariance. Additionally, a graded response model was used for the assessment of item characteristics. Results The results indicate that there is approximate measurement invariance of the COVID-SCORE-10 among the participating countries. Furthermore, IRT results suggest that the COVID-SCORE-10 measures with good psychometric ability a broad spectrum of the construct assessed, especially around average levels. Comparison of COVID-SCORE-10 scores indicated that participants from Cuba, Uruguay and El Salvador had the most positive perceptions of government actions to address the pandemic. Thus, the underlying construct of perception of government actions was equivalent in all countries. Conclusion The results show the importance of initially establishing the fundamental measurement properties and MI before inferring the cross-cultural universality of the construct to be measured.

El Campus Virtual de Salud Pública de la Organización Panamericana de la Salud como estrategia de cooperación técnica

[RESUMEN]. El Campus Virtual de Salud Pública es la plataforma educativa de la Organización Panamericana de la Salud, concebida como herramienta para la cooperación técnica. Los objetivos de este artículo son caracterizar la oferta de formación del Campus Virtual de Salud Pública identificando las propuestas de cursos virtuales; caracterizar a los participantes de los cursos; describir los procesos de actualización tecnológica y sus avances en términos de accesibilidad; e identificar su relación con las principales líneas de cooperación de la Organización Panamericana de la Salud. El Campus Virtual de Salud Pública ha desarrollado 210 cursos con tutoría y 226 de autoaprendizaje desde 2007, relacionados con las políticas de la Organización. Se verificó un uso heterogéneo del campus en las distintas temáticas de la cooperación. La cantidad de cursos autoadministrados realizados durante la pande- mia superó la cifra total acumulada en años previos. Los participantes provienen principalmente de Latinoamérica. Un 67,5% son mujeres, con edades entre 26 y 45 años. Un 57,1% posee educación universitaria, principalmente en enfermería o medicina. La mitad trabaja en hospitales y un 35,8% en el primer nivel. Más de un 90% de los participantes evaluaron favorablemente los temas abordados, recursos de conoci- miento y características del aula virtual. Como dificultades, señalan escasa disponibilidad de tiempo y bajo acceso a internet. Como ventajas, destacan autonomía de horarios y acceso a diversas fuentes de infor- mación. Las herramientas de evaluación disponibles no son suficientes para reconocer el impacto de los programas educativos. Se plantean los desafíos de profundizar en la accesibilidad y calidad de las propuestas educativas, fortalecer la relación con los temas de cooperación y mejorar la evaluación de los cursos y el conocimiento sobre los usuarios.

[ABSTRACT]. The Virtual Campus for Public Health (VCPH) is the educational platform of the Pan American Health Organi- zation, conceived as a tool for technical cooperation. The objectives of this article are to: characterize the training offered at the VCPH, identifying its virtual cour- ses; characterize course participants; describe technological updating processes and the advances made in terms of accessibility; and identify the VCPH's relationship with the main lines of cooperation of the Pan American Health Organization. The VCPH has developed 210 tutored courses and 226 self-learning courses since 2007, related to the Orga- nization’s policies. Heterogeneous use of the campus was observed in the different areas of cooperation. The number of self-learning courses conducted during the pandemic surpassed the total figure accumulated in previous years. Participants are mainly from Latin America; 67.5% are women between 26 and 45 years of age; 57.1% have a university education, mainly in nursing or medicine; half of them work in hospitals and 35.8% at the first level of care. More than 90% of the participants had a favorable opinion of the topics addressed, the learning resources offe- red, and the characteristics of the virtual classroom. Among difficulties, they indicated little available time and poor internet access; among advantages, they emphasized independent schedules and access to various sources of information. The available assessment tools are not sufficient to determine the impact of VCPH educational programs. The challenges are to deepen the accessibility and quality of education offered, strengthen links with areas of cooperation, and improve course evaluations and knowledge about VCPH users.

[RESUMO]. O Campus Virtual de Saúde Pública é a plataforma educacional da Organização Pan-Americana da Saúde, concebida como uma ferramenta de cooperação técnica. Os objetivos deste artigo são caracterizar os treinamentos oferecidos pelo Campus Virtual de Saúde Pública, identificando as propostas de cursos virtuais; caracterizar os participantes desses cursos; descrever os pro- cessos de atualização tecnológica e seu progresso em termos de acessibilidade; e identificar sua relação com as principais linhas de cooperação da Organização Pan-Americana da Saúde. Desde 2007, o Campus Virtual de Saúde Pública desenvolveu 210 cursos com orientação e 226 cursos de autoaprendizagem relacionados às políticas da Organização. Houve um uso heterogêneo do campus em relação aos diferentes temas de cooperação. O número de cursos de autoaprendizagem realizados durante a pandemia excedeu o número total acumulado nos anos anteriores. Os participantes são oriundos principalmente da América Latina. No total, 67,5% são mulheres, com idade entre 26 e 45 anos, e 57,1% têm formação universitária, principalmente em enfermagem ou medicina. Metade trabalha em hospitais e 35,8% na atenção primária. Mais de 90% dos participantes fizeram uma avaliação favorável dos tópicos abordados, recursos de conhe- cimento e características da sala de aula virtual. Como dificuldades, destacam-se a pouca disponibilidade de tempo e o acesso limitado à Internet. As vantagens incluem a autonomia de horários e o acesso a várias fontes de informação. As ferramentas de avaliação disponíveis não são suficientes para reconhecer o impacto dos programas educacionais. Os desafios são aprofundar a acessibilidade e a qualidade das propostas educacionais, fortalecer sua relação com os temas de cooperação e melhorar a avaliação dos cursos e o conhecimento dos usuários.

El Campus Virtual de Salud Pública de la Organización Panamericana de la Salud como estrategia de cooperación técnica / The Pan American Health Organization's Virtual Campus for Public Health as a technical cooperation strategy / O Campus Virtual de Saúde Pública da Organização Pan-Americana de Saúde como estratégia de cooperação técnica

RESUMEN El Campus Virtual de Salud Pública es la plataforma educativa de la Organización Panamericana de la Salud, concebida como herramienta para la cooperación técnica. Los objetivos de este artículo son caracterizar la oferta de formación del Campus Virtual de Salud Pública identificando las propuestas de cursos virtuales; caracterizar a los participantes de los cursos; describir los procesos de actualización tecnológica y sus avances en términos de accesibilidad; e identificar su relación con las principales líneas de cooperación de la Organización Panamericana de la Salud. El Campus Virtual de Salud Pública ha desarrollado 210 cursos con tutoría y 226 de autoaprendizaje desde 2007, relacionados con las políticas de la Organización. Se verificó un uso heterogéneo del campus en las distintas temáticas de la cooperación. La cantidad de cursos autoadministrados realizados durante la pandemia superó la cifra total acumulada en años previos. Los participantes provienen principalmente de Latinoamérica. Un 67,5% son mujeres, con edades entre 26 y 45 años. Un 57,1% posee educación universitaria, principalmente en enfermería o medicina. La mitad trabaja en hospitales y un 35,8% en el primer nivel. Más de un 90% de los participantes evaluaron favorablemente los temas abordados, recursos de conocimiento y características del aula virtual. Como dificultades, señalan escasa disponibilidad de tiempo y bajo acceso a internet. Como ventajas, destacan autonomía de horarios y acceso a diversas fuentes de información. Las herramientas de evaluación disponibles no son suficientes para reconocer el impacto de los programas educativos. Se plantean los desafíos de profundizar en la accesibilidad y calidad de las propuestas educativas, fortalecer la relación con los temas de cooperación y mejorar la evaluación de los cursos y el conocimiento sobre los usuarios.

ABSTRACT The Virtual Campus for Public Health (VCPH) is the educational platform of the Pan American Health Organization, conceived as a tool for technical cooperation. The objectives of this article are to: characterize the training offered at the VCPH, identifying its virtual courses; characterize course participants; describe technological updating processes and the advances made in terms of accessibility; and identify the VCPH's relationship with the main lines of cooperation of the Pan American Health Organization. The VCPH has developed 210 tutored courses and 226 self-learning courses since 2007, related to the Organization's policies. Heterogeneous use of the campus was observed in the different areas of cooperation. The number of self-learning courses conducted during the pandemic surpassed the total figure accumulated in previous years. Participants are mainly from Latin America; 67.5% are women between 26 and 45 years of age; 57.1% have a university education, mainly in nursing or medicine; half of them work in hospitals and 35.8% at the first level of care. More than 90% of the participants had a favorable opinion of the topics addressed, the learning resources offered, and the characteristics of the virtual classroom. Among difficulties, they indicated little available time and poor internet access; among advantages, they emphasized independent schedules and access to various sources of information. The available assessment tools are not sufficient to determine the impact of VCPH educational programs. The challenges are to deepen the accessibility and quality of education offered, strengthen links with areas of cooperation, and improve course evaluations and knowledge about VCPH users.

RESUMO O Campus Virtual de Saúde Pública é a plataforma educacional da Organização Pan-Americana da Saúde, concebida como uma ferramenta de cooperação técnica. Os objetivos deste artigo são caracterizar os treinamentos oferecidos pelo Campus Virtual de Saúde Pública, identificando as propostas de cursos virtuais; caracterizar os participantes desses cursos; descrever os processos de atualização tecnológica e seu progresso em termos de acessibilidade; e identificar sua relação com as principais linhas de cooperação da Organização Pan-Americana da Saúde. Desde 2007, o Campus Virtual de Saúde Pública desenvolveu 210 cursos com orientação e 226 cursos de autoaprendizagem relacionados às políticas da Organização. Houve um uso heterogêneo do campus em relação aos diferentes temas de cooperação. O número de cursos de autoaprendizagem realizados durante a pandemia excedeu o número total acumulado nos anos anteriores. Os participantes são oriundos principalmente da América Latina. No total, 67,5% são mulheres, com idade entre 26 e 45 anos, e 57,1% têm formação universitária, principalmente em enfermagem ou medicina. Metade trabalha em hospitais e 35,8% na atenção primária. Mais de 90% dos participantes fizeram uma avaliação favorável dos tópicos abordados, recursos de conhecimento e características da sala de aula virtual. Como dificuldades, destacam-se a pouca disponibilidade de tempo e o acesso limitado à Internet. As vantagens incluem a autonomia de horários e o acesso a várias fontes de informação. As ferramentas de avaliação disponíveis não são suficientes para reconhecer o impacto dos programas educacionais. Os desafios são aprofundar a acessibilidade e a qualidade das propostas educacionais, fortalecer sua relação com os temas de cooperação e melhorar a avaliação dos cursos e o conhecimento dos usuários.

Cross-cultural validity of the five items Mindful Attention Awareness Scale (MAAS-5) in Peru and Mexico during the COVID-19 pandemic

The Spanish version of the 5-item Mindful Attention Awareness Scale (MAAS-5) is a brief measure of the general tendency to be attentive and aware of experiences in the present moment during daily life. The MAAS-5 has been used in different countries; however, an assessment of its cross-cultural measurement invariance (MI) has not been conducted. Therefore, the study aimed to evaluate the cross-cultural measurement invariance of the MAAS-5 in university students from two countries: Peru and Mexico. A total of 1144 university students from Peru (N = 822) and Mexico (N = 322) responded online to the Spanish version of the 5-item Mindful Attention Awareness Scale (MAAS-5). A multigroup confirmatory factor analysis was performed. Measurement invariance tests the hypothesis that the model behind a set of scores is comparable between groups. The results showed that the unidimensional structure of the MAAS-5 is the same between Peruvian and Mexican university students. Therefore, it is suggested that university students from both countries conceptualize the mindfulness in a similar way. As a result, the MAAS-5 can be used to compare differences between countries. No significant differences were observed in the MAAS-5 score between Peruvian and Mexican university students. The present study contributes to a better understanding of the psychometric properties of the MAAS-5 by presenting MI results in two Latin American countries. Implications of the findings are discussed, which will facilitate a more solid and reliable use of the MAAS-5 in future cross-cultural studies. (AU)

Manifestaciones oftalmológicas de la COVID-19 y bases de su transmisión ocular / Ophthalmic manifestations of COVID-19 and Bases for its ocular transmission

Introducción: La COVID-19 es un importante problema de salud definido como pandemia. Estudios en felinos y murinos describieron cuadros de conjuntivitis, uveítis anterior, retinitis y neuritis óptica. En humanos lo más frecuente es la conjuntivitis viral aguda, sin embargo, su estudio continúa en evolución. Se investiga la infección por coronavirus adquirida mediante la transmisión ocular, pero su mecanismo no se ha esclarecido totalmente. Objetivos: Describir las principales manifestaciones oftalmológicas, así como el papel del dinamismo de la superficie ocular y la presencia de receptores moleculares en la transmisión del SARS-CoV-2 por esta vía. Métodos: Se realizó una revisión de la literatura en idioma español e inglés, en los repositorios PubMed, Ebsco, Scielo y Google Académico desde el 1ro de enero hasta el 31 de julio de 2020. Además, se consultaron sitios web de organismos y asociaciones oftalmológicas. Conclusiones: La conjuntivitis viral es la principal presentación oftalmológica del coronavirus 2019. Aunque existe un bajo riesgo de infestación a través de lágrimas, su mecanismo de transmisión por esta vía se ha descrito. Incluso en ausencia de conjuntivitis, el SARS-CoV-2 puede existir o replicarse en la conjuntiva, por tanto, la protección ocular es aconsejable(AU)

Introduction: COVID-19 is an important global health problem which has been declared pandemic by the World Health Organization. Studies on felines and murines have described cases of conjunctivitis, anterior uveitis, retinitis and optic neuritis. The most common condition in humans is acute viral conjunctivitis; however, its study is still in progress. Research is conducted about coronavirus infection acquired by ocular transmission, the mechanism of which has not been totally clarified. Objectives: Describe the main ophthalmic manifestations, as well as the role played by ocular surface dynamics and the presence of molecular receptors in SARS-CoV-2 transmission by this route. Methods: A literature review was conducted of papers published in Spanish or English in the repositories PubMed, Ebsco, Scielo and Google Scholar from 1 January to 31 July 2020. Websites of ophthalmological agencies and associations were also consulted. Conclusions: Viral conjunctivitis is the main ophthalmic presentation of coronavirus 2019. Although the risk of contagion through tears is low, the transmission mechanism by this route has not been described. Even in the absence of conjunctivitis, SARS-CoV-2 may exist or replicate in the conjunctiva. Ocular protection is therefore advisable(AU)