Towards teaching analytics: a contextual model for analysis of students' evaluation of teaching through text mining and machine learning classification.

Recent trends in educational technology have led to emergence of methods such as teaching analytics (TA) in understanding and management of the teaching-learning processes. Didactically, teaching analytics is one of the promising and emerging methods within the Education domain that have proved to be useful, towards scholastic ways to make use of substantial pieces of evidence drawn from educational data to improve the teaching-learning processes and quality of performance. For this purpose, this study proposed an educational process and data mining plus machine learning (EPDM + ML) model applied to contextually analyze the teachers' performances and recommendations based on data derived from students' evaluation of teaching (SET). The EPDM + ML model was designed and implemented based on amalgamation of the Text mining and Machine learning technologies that builds on the descriptive decision theory, which studies the rationality behind decisions the learners are disposed to make based on the textual data quantification and statistical analysis. To this effect, the study determines pedagogical factors that influences the students' recommendations for their teachers, what role the sentiment and emotions expressed by the students in the SET play in the way they evaluate the teachers by taking into account the gender of the teachers. This includes how to automatically predict what a student's recommendation for the teachers may be based on information about the students' gender, average sentiment, and emotional valence they have shown in the SET. Practically, we applied the Text mining technique to extract the different sentiments and emotions (intensities of the comments) expressed by the students in the SET, and then utilized the quantified data (average sentiment and emotional valence) to conduct an analysis of covariance and Kruskal Wallis Test to determine the influential factors, as well as, how the students' recommendation for the teachers differ by considering the gender constructs, respectively. While a large proportion of the comments that we analyzed (n = 85,378) was classified to be neutral and predominantly interpreted to be positive in nature considering the sentiments (76.4%), and emotional valence (88.2%) expressed by the students. The results of our analysis shows that for the students' comments which contain some kind of positive or negative sentiment (23.6%) and emotional valence (11.8%); that females students recommended the teachers taking into account the sentiments (p = .000). While the males appear to be slightly borderline in terms of emotions (p = .056) and sentiment (p = .077). Also, the EPDM + ML model showed to be a good predictor and efficient method in determining what the students' recommendation scores for the teachers would be, going by the high and acceptable values of the precision (1.00), recall (1.00), specificity (1.00), accuracy (1.00), F1-score (1.00) and zero error-rate (0.00) which we validated using the k-fold cross-validation method, with 63.6% of optimal k-values observed. In theory, we note that not only does the proposed method (EPDM + ML) proves to be useful towards effective analysis of SET and its implications within the educational domain. But can be utilized to determine prominent factors that influences the students' evaluation and recommendation of the teachers, as well as helps provide solutions to the ever-increasingly need to advance and support the teaching-learning processes and/or students' learning experiences in a rapidly changing educational environment or ecosystem.

Population-Based COVID-19 Screening in Mexico: Assessment of Symptoms and Their Weighting in Predicting SARS-CoV-2 Infection.

Background and Objectives: Sentinel surveillance in the early stage of the COVID-19 pandemic in Mexico represented a significant cost reduction and was useful in estimating the population infected with SARS-CoV-2. However, it also implied that many patients were not screened and therefore had no accurate diagnosis. In this study, we carried out a population-based SARS-CoV-2 screening in Mexico to evaluate the COVID-19-related symptoms and their weighting in predicting SARS-CoV-2 infection. We also discuss this data in the context of the operational definition of suspected cases of COVID-19 established by the Mexican Health Authority's consensus. Materials and Methods: One thousand two hundred seventy-nine subjects were included. They were screened for SARS-CoV-2 using RT-PCR. The weighting of COVID-19 symptoms in predicting SARS-CoV-2 infection was evaluated statistically. Results: Three hundred and twenty-five patients were positive for SARS-CoV-2 and 954 were negative. Fever, asthenia, dysgeusia, and oxygen saturation predicted SARS-CoV-2 infection (odds ratios ranged from 1.74 to 4.98; p < 0.05). The percentage of asymptomatic COVID-19 patients was 36% and only 38.15% met the Mexican operational definition. Cq-values for the gene N of SARS-CoV-2 were significantly higher in asymptomatic subjects than in the groups of COVID-19 patients with neurological, respiratory, and/or musculoskeletal manifestations (p < 0.05). Conclusions: Dysgeusia, fever, and asthenia increased the odds of a positive result for COVID-19 1.74-4.98-fold among the study population. Patients with neurological, respiratory, and/or musculoskeletal manifestations had higher viral loads at COVID-19 diagnosis than those observed in asymptomatic patients. A high percentage of the participants in the study (61.85%) did not meet the operational definition for a suspected case of COVID-19 established by the Mexican Health Authority's consensus, representing a high percentage of the population that could have remained without a COVID-19 diagnosis, so becoming a potential source of virus spread.

The effect of a mandibular advancement appliance on cervical lordosis in patients with TMD and cervical pain.

AIMS: A preliminary study to compare cervical lordosis by means of cervical cephalometric analysis, before and after six months of continuous mandibular advancement appliance (MAA) use, and to show how physical therapy posture re-education would improve the cervical lordosis angle. METHODOLOGY: Twenty-two female patients with temporomandibular disorders (TMD) and cervical pain with lordosis <20° were included. Patients had to have a muscle pain history for at least six months, and with an intensity ⩾6, measured by means of a visual analog scale (a horizontal 0-10 numeric rating scale with 0 labeled as 'no pain' and 10 as 'worst imaginable pain'). Patients had to present the angle formed by the posterior tangents to C2 and C7 of equal or less than 20°. Cephalometric and clinical diagnostics were performed initially (baseline) and at the end of the study period (six months). During the third month with MAA treatment, a physical therapist evaluated the postural deficit and performed a program of postural re-education. Angular and linear dimension data presented a normal distribution (P>0·05; Shapiro Wilk Test), so the paired comparison of the cephalometric measurements was made by t-test for dependent samples. RESULTS: Angle 1 (OPT/7CVT); angle 3 (CVT/EVT) and angle 4 (2CL/7CL) showed a significant increase in the cervical lordosis. Angle 2 (MGP/OP), angle 5 (HOR/CVT) and the distances C0-C2 and Pt-VER, presented no significant changes. CONCLUSIONS: The increase in cervical lordosis implies that six months of continuous MAA use, together with a program of postural re-education, promotes the homeostasis of the craniocervical system.

Exploring stakeholders perspectives on TB contact investigation in Cali, Colombia: a qualitative study.

Introduction: Contact investigation is a proven intervention for tuberculosis (TB) case finding and prevention. Although widely endorsed by national public health authorities and the World Health Organization, many countries struggle to implement it effectively. The objective of the study is to describe and characterize the barriers and facilitators of TB contact investigation in Cali, Colombia from the perspective and experience of the key stakeholders involved. Methods: We collected data from group discussions during two workshop sessions with clinic and public health staff involved in TB contact investigation (June 2019 and March 2020 respectively) and semi-structured interviews with TB cases and their household contacts (July 2019 to April 2020). We undertook an inductive thematic analysis with the RADaR technique to characterize the barriers and facilitators of the TB contact investigation process. Results: The two workshops included 21 clinics and 12 public health staff. We also conducted 26 semi-structured interviews with TB cases and their household contacts. Using thematic analysis, we identified four common themes: Healthcare Operations, Essential Knowledge, Time Limitations and Competing Responsibilities, and Interpersonal Interactions. The main barriers to conducting household visits were low data quality, stigma and mistrust, safety concerns for health workers, and limited resources. The main barriers to TB uptake by contacts were competing responsibilities, low TB risk perceptions among contacts, and difficulty accessing diagnostic tests for contacts. In contrast, good communication and social skills among health workers and accurate TB knowledge facilitated successful household visits and TB test uptake, according to key stakeholders. Conclusion: This study provides a deeper understanding of TB contact investigation barriers and facilitators in a high-prevalence urban setting in a middle-income country from the perspective and experience of key stakeholders. The study shed light on the barriers that hinder household contacts engagement and TB test uptake such as issues of systemic capacity and TB knowledge. Also, highlighted facilitators such as the importance of interpersonal communication skills among health workers in the public and private sector. The insights from this study can serve as a valuable resource for public health organizations seeking to enhance their contact investigation efforts and improve TB control in similar settings.

Circulating Biomarkers Associated with the Diagnosis and Prognosis of B-Cell Progenitor Acute Lymphoblastic Leukemia.

Acute lymphoblastic leukemia (ALL) is a hematological disease characterized by the dysfunction of the hematopoietic system that leads to arrest at a specific stage of stem cells development, suppressing the average production of cellular hematologic components. BCP-ALL is a neoplasm of the B-cell lineage progenitor. BCP-ALL is caused and perpetuated by several mechanisms that provide the disease with its tumor potential and genetic and cytological characteristics. These pathological features are used for diagnosis and the prognostication of BCP-ALL. However, most of these paraclinical tools can only be obtained by bone marrow aspiration, which, as it is an invasive study, can delay the diagnosis and follow-up of the disease, in addition to the anesthetic risk it entails for pediatric patients. For this reason, it is crucial to find noninvasive and accessible ways to supply information concerning diagnosis, prognosis, and the monitoring of the disease, such as circulating biomarkers. In oncology, a biomarker is any measurable indicator that demonstrates the presence of malignancy, tumoral behavior, prognosis, or responses to treatments. This review summarizes circulating molecules associated with BCP-ALL with potential diagnostic value, classificatory capacity during monitoring specific clinic features of the disease, and/or capacity to identify each BCP-ALL stage regarding its evolution and outcome of the patients with BCP-ALL. In the same way, we provide and classify biomarkers that may be used in further studies focused on clinical approaches or therapeutic target identification for BCP-ALL.

Effect of laterotrusive occlusal scheme on chewing duration, external intercostal muscular activity, heart rate, and oxygen saturation.

Objective: To evaluate the effect of the laterotrusive occlusal scheme on chewing duration, external intercostal (EIC) electromyographic (EMG) activity, heart rate (HR), and oxygen saturation (OS) during different tasks in the upright seated position.Methods: Fifty young participants, 25 with canine guidance and 25 with group function, were included. Chewing duration, bilateral EIC EMG activity, HR, and OS were recorded during the following tasks: 1) chewing until swallowing threshold; 2) laterotrusive teeth grinding.Results: Chewing duration, bilateral EIC EMG activity, HR, and OS showed no significant differences between the two laterotrusive occlusal schemes during the tasks studied.Conclusion: These results suggest that chewing duration, EIC muscle activity, HR, and OS were not significantly influenced by the laterotrusive occlusal scheme. Therefore, when a modification of the laterotrusive occlusal scheme is needed during oral rehabilitation or orthodontic treatment, canine guidance or group function should not significantly change EMG activity of EIC muscles.

Maternal and perinatal outcomes in pregnant women with confirmed COVID-19 infection, Santa Teresa Hospital, Comayagua, Honduras. Case series / Resultado materno perinatal de las gestantes con infección confirmada por COVID-19, hospital Santa Teresa, Comayagua, Honduras. Serie de casos.

Objectives: To describe maternal and perinatal outcomes in pregnant women with confirmed COVID-19 infection in a hospital in Comayagua, Honduras. Material and methods: Descriptive case series study that included symptomatic pregnant women who came or were referred between March 1, 2020 and March 31, 2021 to a public referral institution, with PCR-confirmed diagnosis of COVID-19 infection. Sociodemographic, obstetric considerations, infection severity, length of hospital stay, and maternal and perinatal complications were the measured variables. The frequency of COVID-19 infection and the maternal and perinatal outcomes of these gestations were estimated. A descriptive analysis was performed. Results: A total of 2258 pregnant women were seen during the study period. Of them, 23 who met the selection criteria were included, for a frequency of COVID-19 infection of 1.01 %. The study population characteristically consisted of young women living in common-law marriage. Thirteen patients were managed as outpatients because of a mild clinical condition, and 10 were hospitalized. The pregnant women managed as outpatients were delivered by cesarean section (76.9 %) due to dissatisfactory fetal status at a gestational age of 37 weeks or more, with 3 pre-term delivery cases (36 weeks) documented. Of the hospitalized patients, one had a miscarriage and nine were delivered due to an obstetric indication. There was one case of premature birth, and one maternal (4 %) and one neonatal death were documented. Conclusions: During the study period, 1% of the pregnant women had COVID-19 infection at the Santa Teresa Hospital in Comayagua. Further studies analyzing the maternal and perinatal impact of COVID-19 infection in the Central American region are required.

Objetivos: describir el resultado materno y perinatal de las gestantes con infección confirmada por COVID-19 en una institución hospitalaria en Comayagua, Honduras. Materiales y métodos: estudio descriptivo tipo serie de casos. Se incluyeron gestantes sintomáticas que consultaron o fueron remitidas desde el 1 de marzo de 2020 hasta el 31 de marzo del 2021 a una institución pública de referencia, con diagnóstico confirmado por PCR de infección por COVID-19. Se midieron variables sociodemográficas, obstétricas, severidad de la infección, estancia hospitalaria, complicaciones maternas y perinatales. Se estimó la frecuencia de infección por COVID-19 y los resultados maternos y perinatales de estas gestaciones; se realizó análisis descriptivo. Resultados: en el periodo descrito consultaron 2.258 gestantes, de estas se incluyeron 23, quienes cumplieron con los criterios de selección, para una frecuencia de infección por COVID-19 del 1,01 %. La población de estudio se caracterizó por estar constituida por mujeres jóvenes y en unión libre. Trece pacientes recibieron manejo ambulatorio por cuadro clínico leve, diez requirieron hospitalización. Las embarazadas manejadas ambulatoriamente finalizaron la gestación vía cesárea (76,9 %) por estado fetal insatisfactorio, con edad gestacional mayor o igual a 37 semanas, y tres casos fueron pretérmino (36 semanas). De las gestantes hospitalizadas, una desarrolló aborto espontáneo, y nueve finalizaron la gestación por una indicación obstétrica. Se presentó un parto prematuro y se documentó una muerte materna (4 %) y neonatal. Conclusiones: el 1 % de las gestantes adquirieron la infección por COVID-19 en el Hospital Santa Teresa de Comayagua en el periodo de estudio. Se requieren más estudios que analicen el impacto materno perinatal de la infección por COVID-19 en la región centroamericana.

The impact of the COVID-19 pandemic on students' feelings at high school, undergraduate, and postgraduate levels.

The COVID-19 pandemic and the enforced restrictions have harshly affected educational sectors in 161 countries around the world. With more than 1.6 billion students away from normal school life, the crisis threatens the teaching and learning processes and the students' emotional health. Herein, we present the result of a careful assessment of the feelings of over 13,000 students at high school, undergraduate, and postgraduate levels across 36 campuses over 8 subsequent weeks from the onset of the COVID-19 pandemic. The results indicate a general low energy level and dominance of negative feelings among the students regardless of their academic levels. We have recorded 5 responses (being anxious, stressed, overwhelmed, tired, and depressed) as the most frequently reported feelings in the time of lockdown. Overall, 14% of those who have reported to suffer from these feelings have also identified a need for professional help in managing their feelings throughout the quarantine period. The current study also presents several strategies to combat the undesirable consequences of COVID-19 pandemic.

Toward social-ecological coastal zone governance of Chiloé Island (Chile) based on the DPSIR framework.

Coastal zones are complex systems where sustainability needs local participative governance, whose absence may result in conflicts between social actors. In its absence, the first step should be a diagnosis of the current situation based on integrative conceptual frameworks such as the DPSIR. However, in conflicting situations, the generated model needs validation from social actors. Chiloé Island is a critical Chilean coastal fishery and aquaculture area, coexisting with subsistence and cultural uses of marine resources. This article analyzes the current ecological state of the Chiloé coastal zone and its main social-ecological impact using a DPSIR model. We validated its results through a household survey and interviews with local experts and social actors. Results show that increased coastal fisheries and aquaculture generate a critical decrease of coastal species, eutrophication, and pollution that, along with harmful algal blooms, generate conflicts. Social validation showed that experts and local social actors have different perceptions of conflicting parties and conflict solutions. Following a post-normal approach, we propose three ideas to start social-ecological governance of Chiloé coastal marine ecosystems.

Fibroblast Growth Factor Type 2 (FGF2) Administration Attenuated the Clinical Manifestations of Preeclampsia in a Murine Model Induced by L-NAME.

Background: In preeclampsia, a hypertensive disorder of pregnancy, the poor remodeling of spiral arteries leads to placental hypoperfusion and ischemia, provoking generalized maternal endothelial dysfunction and, in severe cases, death. Endothelial and placental remodeling is important for correct pregnancy evolution and is mediated by cytokines and growth factors such as fibroblast growth factor type 2 (FGF2). In this study, we evaluated the effect of human recombinant FGF2 (rhFGF2) administration in a murine model of PE induced by NG-nitro-L-arginine methyl ester (L-NAME) to test if rhFGF2 administration can lessen the clinical manifestations of PE. Methods: Pregnant rats were administrated with 0.9% of NaCl (vehicle), L-NAME (60 mg/kg), FGF2 (666.6 ng/kg), L-NAME+FGF2 or L-NAME + hydralazine (10 mg/kg) from the 10th to 19th days of gestation. Blood pressure (BP), urine protein concentrations and anthropometric values both rat and fetuses were assessed. Histological evaluation of organs from rats delivered by cesarean section was carried out using hematoxylin and eosin staining. Results: A PE-like model was established, and it included phenotypes such as maternal hypertension, proteinuria, and fetal growth delay. Compared to the groups treated with L-NAME, the L-NAME + FGF2 group was similar to vehicle: the BP remained stable and the rats did not develop enhanced proteinuria. Both the fetuses and placentas from rats treated with L-NAME + FGF2 had similar values of weight and size compared with the vehicle. Conclusion: The intravenous administration of rhFGF2 showed beneficial and hypotensive effects, reducing the clinical manifestations of PE in the evaluated model.

[Work demands and alcohol consumption: the job group's role]. / Demandas laborales y consumo de alcohol: el rol del grupo de trabajo.

The current study aimed to determine whether workgroup identification and alcohol consumption social norms of workgroup moderates the relationship between job demands and alcohol consumption in workers. Regression analysis using the moderated moderation macro in a sample of workers from a telecommunications company in Chile (N = 1,143) supports the hypothesis of moderated moderation: high workgroup identification with with unfavorable social norms of alcohol consumption by the group buffered the relationship between job demands and alcohol consumption of workers (B = -0.080; t = -2.01; p = 0.04; 95%CI: -0.1600; -0.0024), and the high workgroup identification with favorable social norms of alcohol consumption by the group increases the relationship between job demands and alcohol consumption of workers (B = 0.170; t = 2.36; p = 0.01; 95%CI: 0.030; 0.322). The results suggest that strong identification with workgroup and their social norms for alcohol consumption are job resources that can jointly affect or protect workers exposed to heavy work demands. Attention should thus be focused on the potential positive versus harmful effects of these work resources.

El objetivo del presente estudio fue determinar si la identificación con grupos de trabajo, con normas desfavorables y favorables de consumo de alcohol del grupo de trabajo, modera la relación entre las demandas del trabajo y el consumo de alcohol en trabajadores. A través de una análisis de regresión, usando la macro de moderación moderada en una muestra de trabajadores de una empresa de telecomunicaciones de Chile (N = 1.143), se presta apoyo a las hipótesis de moderación moderada: la alta identificación con grupos de trabajo con normas desfavorables de consumo de alcohol de ese grupo amortigua la relación entre las demandas del trabajo y el consumo de alcohol en trabajadores (B = -0,080; t = -2,01; p = 0,04; IC95%: -0,1600; -0,0024) y la alta identificación con grupos de trabajo con normas favorables de consumo de alcohol de ese grupo incrementa la relación entre las demandas del trabajo y el consumo de alcohol en trabajadores (B = 0,170; t = 2,36; p = 0,01; IC95%: 0,030; 0,322). Estos resultados sugieren que la alta identificación con grupos de trabajo y sus normas sociales de consumo de alcohol son recursos laborales que, de manera conjunta, pueden afectar o proteger a trabajadores expuestos a altas demandas laborales. Por lo tanto, se recomienda atender a los potenciales efectos positivos, así como también a los efectos perniciosos, de estos recursos laborales.

O objetivo do presente estudo foi determinar se a identificação com grupos de trabalho, com normas desfavoráveis e favoráveis de consumo de álcool do grupo de trabalho, medeia a relação entre as exigências do trabalho e o consumo de álcool dos trabalhadores. Uma análise de regressão, usando a macro de mediação moderada numa amostra de trabalhadores de uma empresa de telecomunicações do Chile (N = 1.143), sustenta as hipóteses de mediação moderada: a alta identificação com grupos de trabalho com normas desfavoráveis de consumo de álcool desse grupo mitiga a relação entre as exigências do trabalho e o consumo de álcool nos trabalhadores (B = -0,080; t = -2,01; p = 0,04; IC95%: -0,1600; -0,0024) e a alta identificação com grupos de trabalho com normas favoráveis de consumo de álcool desse grupo incrementa a relação entre as exigências do trabalho e o consumo de álcool nos trabalhadores (B = 0,170; t = 2,36; p = 0,01; IC95%: 0,030; 0,322). Estes resultados sugerem que a alta identificação com grupos de trabalho e suas normas sociais de consumo de álcool são recursos laborais que, de maneira conjunta, podem afetar ou proteger trabalhadores expostos a altas exigências laborais. Portanto, recomendam-se considerar os potenciais efeitos positivos, como também os efeitos perniciosos, desses recursos laborais.

Awake teeth grinding in participants with canine guidance or group function: Effect on diaphragm EMG activity, heart rate, and oxygen saturation.

Objective: To compare the effect of canine guidance or group function on diaphragm activity, heart rate, and oxygen saturation during awake teeth grinding at different body positions. Methods: Fifty healthy participants, 25 with canine guidance and 25 with group function, were included. Bilateral electromyographic (EMG) recordings of the diaphragm (DIA) during awake teeth grinding were performed in standing, seated upright, and right lateral decubitus positions. Simultaneously, heart rate and oxygen saturation were measured. Results: EMG activity of the DIA muscle was similar in the working side and non-working side between participants with canine guidance and group function in the different body positions studied. The heart rate and oxygen saturation showed no significant differences between the two groups. Conclusion: EMG activity of the DIA muscle, the heart rate, and oxygen saturation during teeth grinding are not significantly influenced by the type of laterotrusive occlusal scheme.

Does professors' gender impact how students evaluate their teaching and the recommendations for the best professor?

This study examined the impact of the professors' gender according to a student evaluation of teaching (SET) in a private university. The study took place in a private university (n = 103,833) on six different campuses in the north region of Mexico. The distribution of the professors' gender was analyzed according to semesters, campuses, and schools. Our findings suggested that when undergraduates evaluated their professors on specific criteria concerning teaching performance, they expressed their opinion regardless of the professors' gender. However, when being asked for a single overall evaluation, as whether they would recommend the professor as one of their best professors, the students tended to favor male professors over their female peers by a slight margin. While such perceptions might not be representative of the actual teaching quality, it would be interesting in the future to delve deeper into the causes of possible biases.

Influence of laterotrusive occlusal scheme on bilateral masseter EMG activity during clenching and grinding.

This study was designed to determine the effect of the occlusal scheme on masseter EMG activity at different jaw posture tasks. The sample included 30 healthy subjects with natural dentition and bilateral molar support, 15 with bilateral canine guidance, and 15 with bilateral group function. An inclusion criterion was that subjects had to be free of signs and symptoms of any dysfunction of the masticatory system. Bipolar surface electrodes were located on the left and right masseter muscles. EMG activity was recorded during the following jaw posture tasks: A. maximal clenching in the intercuspal position; B. grinding from intercuspal position to edge-to-edge lateral contact position; C. maximal clenching in the edge-to-edge lateral contact position; D. grinding from edge-to-edge lateral contact position to intercuspal position. EMG activity in tasks B, C, and D was lower than in task A (mixed model with unstructured covariance matrix). EMG activity was not significantly different with canine guidance or group function. EMG activity recorded on the nonworking side was higher than the working side during task C, and no different between tasks B or D. On the nonworking side, EMG activity in task B was significantly lower than C and D, and similar between task C and D. On the working side, EMG activity was significantly higher in task D than C and B, and in task B significantly higher than task C. The EMG patterns observed could be of clinical importance in the presence of parafunctional habits, i.e., clenching and/or grinding.

Attributions about homelessness in homeless and domiciled people in Madrid, Spain: "Why are they homeless people?".

Causal attributions of homelessness may affect both the design and acceptance of public policies aimed at improving the situation of homeless people and the strategies that homeless people themselves decide to adopt in order to cope with their situation. This article analyzes the differences in causal attributions of homelessness based on gender, age, nationality, educational background, perceived social class, evolution of personal economic situation, and future expectations between the members of 2 groups: (a) "homeless group", consisting of a representative sample of homeless people in Madrid, Spain (n = 188); and (b) "domiciled group", consisting of a sample of people in Madrid at no risk of homelessness (n = 180), matched for sex, age and nationality. Results show that among domiciled population, women, older people, those without university education, those considering themselves to belong to lower income social classes, those who considered their economic situation to have worsened, and those who expressed negative expectations for the future attributed homelessness to individualistic courses to a greater extent. Meanwhile, among homeless group, younger people, those without university education, those considering themselves to belong to higher social classes, those who perceived their economic situation as having improved in recent years, and those who expressed positive expectations for the future generally attributed homelessness to individualistic courses to a greater extent. (PsycINFO Database Record

Actors, observers, and causal attributions of homelessness: Differences in attribution for the causes of homelessness among domiciled and homeless people in Madrid (Spain).

The study analyzes the differences in causal attributions of homelessness and attributions of responsibility among the members of 3 groups: homeless group, consisting of a representative sample of homeless people in Madrid, Spain (n = 188); domiciled service-users group, consisting of people at risk of homelessness (n = 164); and domiciled nonservice-users group, consisting of people at no imminent risk of homelessness (n = 180). The domiciled service-users group and domiciled nonservice-users group were matched to the homeless group or sex, age, and nationality. The article also analyzes homeless people's causal attributions as regards their own situation. The results show that compared with the domiciled nonservice-users group, a higher percentage of members of the homeless group and domiciled service-users group attributed homelessness to individualistic causes and they blamed homeless people for their situation to a greater extent. The results also show that there was no "actor-observer bias" in causal attributions for homelessness in Madrid. (PsycINFO Database Record

Resultado materno perinatal de las gestantes con infección confirmada por COVID-19, hospital Santa Teresa, Comayagua, Honduras. Serie de casos / Maternal and perinatal outcomes in pregnant women with confirmed COVID-19 infection, Santa Teresa Hospital, Comayagua, Honduras. Case series

Objetivos: describir el resultado materno y perinatal de las gestantes con infección confirmada por COVID-19 en una institución hospitalaria en Comayagua, Honduras. Materiales y métodos: estudio descriptivo tipo serie de casos. Se incluyeron gestantes sintomáticas que consultaron o fueron remitidas desde el 1 de marzo de 2020 hasta el 31 de marzo del 2021 a una institución pública de referencia, con diagnóstico confirmado por PCR de infección por COVID-19. Se midieron variables sociodemográficas, obstétricas, severidad de la infección, estancia hospitalaria, complicaciones maternas y perinatales. Se estimó la frecuencia de infección por COVID-19 y los resultados maternos y perinatales de estas gestaciones; se realizó análisis descriptivo. Resultados: en el periodo descrito consultaron 2.258 gestantes, de estas se incluyeron 23, quienes cumplieron con los criterios de selección, para una frecuencia de infección por COVID-19 del 1,01 %. La población de estudio se caracterizó por estar constituida por mujeres jóvenes y en unión libre. Trece pacientes recibieron manejo ambulatorio por cuadro clínico leve, diez requirieron hospitalización. Las embarazadas manejadas ambulatoriamente finalizaron la gestación vía cesárea (76,9 %) por estado fetal insatisfactorio, con edad gestacional mayor o igual a 37 semanas, y tres casos fueron pretérmino (36 semanas). De las gestantes hospitalizadas, una desarrolló aborto espontáneo, y nueve finalizaron la gestación por una indicación obstétrica. Se presentó un parto prematuro y se documentó una muerte materna (4 %) y neonatal. Conclusiones: el 1 % de las gestantes adquirieron la infección por COVID-19 en el Hospital Santa Teresa de Comayagua en el periodo de estudio. Se requieren más estudios que analicen el impacto materno perinatal de la infección por COVID-19 en la región centroamericana.

Objectives: To describe maternal and perinatal outcomes in pregnant women with confirmed COVID-19 infection in a hospital in Comayagua, Honduras. Material and methods: Descriptive case series study that included symptomatic pregnant women who came or were referred between March 1, 2020 and March 31, 2021 to a public referral institution, with PCR-confirmed diagnosis of COVID-19 infection. Sociodemographic, obstetric considerations, infection severity, length of hospital stay, and maternal and perinatal complications were the measured variables. The frequency of COVID-19 infection and the maternal and perinatal outcomes of these gestations were estimated. A descriptive analysis was performed. Results: A total of 2258 pregnant women were seen during the study period. Of them, 23 who met the selection criteria were included, for a frequency of COVID-19 infection of 1.01 %. The study population characteristically consisted of young women living in common-law marriage. Thirteen patients were managed as outpatients because of a mild clinical condition, and 10 were hospitalized. The pregnant women managed as outpatients were delivered by cesarean section (76.9 %) due to dissatisfactory fetal status at a gestational age of 37 weeks or more, with 3 pre-term delivery cases (36 weeks) documented. Of the hospitalized patients, one had a miscarriage and nine were delivered due to an obstetric indication. There was one case of premature birth, and one maternal (4 %) and one neonatal death were documented. Conclusions: During the study period, 1% of the pregnant women had COVID-19 infection at the Santa Teresa Hospital in Comayagua. Further studies analyzing the maternal and perinatal impact of COVID-19 infection in the Central American region are required.

Does head posture have a significant effect on the hyoid bone position and sternocleidomastoid electromyographic activity in young adults?

The aim of this study was to evaluate the associations between head posture (head extension, normal head posture, and head flexion) and anteroposterior head position, hyoid bone position, and the sternocleidomastoid integrated electromyographic (IEMG) activity in a sample of young adults. The study included 50 individuals with natural dentition and bilateral molar support. A lateral craniocervical radiograph was taken for each subject and a cephalometric analysis was performed. Head posture was measured by means of the craniovertebral angle formed by the MacGregor plane and the odontoid plane. According to the value of this angle, the sample was divided into the following three groups: head extension (less than 95 degrees); normal head posture (between 95 degrees and 106 degrees); and head flexion (more than 106 degrees). The following cephalometric measurements were taken to compare the three groups: anteroposterior head position (true vertical plane/pterygoid distance), anteroposterior hyoid bone position (true vertical plane-Ha distance), vertical hyoid bone position (H-H' distance in the hyoid triangle), and CO-C2 distance. In the three groups, IEMG recordings at rest and during swallowing of saliva and maximal voluntary clenching were performed by placing bipolar surface electrodes on the right and left sternocleidomastoid muscles. In addition, the condition with/without craniomandibular dysfunction (CMD) in each group was also assessed. Head posture showed no significant association with anteroposterior head position, anteroposterior hyoid bone position, vertical hyoid bone position, or sternocleidomastoid IEMG activity. There was no association to head posture with/without the condition of CMD. Clinical relevance of the results is discussed.

Demandas laborales y consumo de alcohol: el rol del grupo de trabajo / Work demands and alcohol consumption: the job groups role / Exigências laborais e consumo de álcool: o papel do grupo de trabalho

El objetivo del presente estudio fue determinar si la identificación con grupos de trabajo, con normas desfavorables y favorables de consumo de alcohol del grupo de trabajo, modera la relación entre las demandas del trabajo y el consumo de alcohol en trabajadores. A través de una análisis de regresión, usando la macro de moderación moderada en una muestra de trabajadores de una empresa de telecomunicaciones de Chile (N = 1.143), se presta apoyo a las hipótesis de moderación moderada: la alta identificación con grupos de trabajo con normas desfavorables de consumo de alcohol de ese grupo amortigua la relación entre las demandas del trabajo y el consumo de alcohol en trabajadores (B = -0,080; t = -2,01; p = 0,04; IC95%: -0,1600; -0,0024) y la alta identificación con grupos de trabajo con normas favorables de consumo de alcohol de ese grupo incrementa la relación entre las demandas del trabajo y el consumo de alcohol en trabajadores (B = 0,170; t = 2,36; p = 0,01; IC95%: 0,030; 0,322). Estos resultados sugieren que la alta identificación con grupos de trabajo y sus normas sociales de consumo de alcohol son recursos laborales que, de manera conjunta, pueden afectar o proteger a trabajadores expuestos a altas demandas laborales. Por lo tanto, se recomienda atender a los potenciales efectos positivos, así como también a los efectos perniciosos, de estos recursos laborales.

The current study aimed to determine whether workgroup identification and alcohol consumption social norms of workgroup moderates the relationship between job demands and alcohol consumption in workers. Regression analysis using the moderated moderation macro in a sample of workers from a telecommunications company in Chile (N = 1,143) supports the hypothesis of moderated moderation: high workgroup identification with with unfavorable social norms of alcohol consumption by the group buffered the relationship between job demands and alcohol consumption of workers (B = -0.080; t = -2.01; p = 0.04; 95%CI: -0.1600; -0.0024), and the high workgroup identification with favorable social norms of alcohol consumption by the group increases the relationship between job demands and alcohol consumption of workers (B = 0.170; t = 2.36; p = 0.01; 95%CI: 0.030; 0.322). The results suggest that strong identification with workgroup and their social norms for alcohol consumption are job resources that can jointly affect or protect workers exposed to heavy work demands. Attention should thus be focused on the potential positive versus harmful effects of these work resources.

O objetivo do presente estudo foi determinar se a identificação com grupos de trabalho, com normas desfavoráveis e favoráveis de consumo de álcool do grupo de trabalho, medeia a relação entre as exigências do trabalho e o consumo de álcool dos trabalhadores. Uma análise de regressão, usando a macro de mediação moderada numa amostra de trabalhadores de uma empresa de telecomunicações do Chile (N = 1.143), sustenta as hipóteses de mediação moderada: a alta identificação com grupos de trabalho com normas desfavoráveis de consumo de álcool desse grupo mitiga a relação entre as exigências do trabalho e o consumo de álcool nos trabalhadores (B = -0,080; t = -2,01; p = 0,04; IC95%: -0,1600; -0,0024) e a alta identificação com grupos de trabalho com normas favoráveis de consumo de álcool desse grupo incrementa a relação entre as exigências do trabalho e o consumo de álcool nos trabalhadores (B = 0,170; t = 2,36; p = 0,01; IC95%: 0,030; 0,322). Estes resultados sugerem que a alta identificação com grupos de trabalho e suas normas sociais de consumo de álcool são recursos laborais que, de maneira conjunta, podem afetar ou proteger trabalhadores expostos a altas exigências laborais. Portanto, recomendam-se considerar os potenciais efeitos positivos, como também os efeitos perniciosos, desses recursos laborais.

Gas Permeation Properties of Soluble Aromatic Polyimides Based on 4-Fluoro-4,4'-Diaminotriphenylmethane.

A series of new organic polyimides were synthesized from 4-fluoro-4'4"-diaminotriphenylmethane and four different aromatic dianhydrides through a one-step, high-temperature, direct polycondensation in m-cresol at 180-200 °C, resulting in the formation of high-molecular-weight polyimides (inherent viscosities ~ 1.0-1.3 dL/g). All the resulting polyimides exhibited good thermal stability with initial decomposition temperatures above 434 °C, glass-transition temperatures between 285 and 316 °C, and good solubility in polar aprotic solvents. Wide-angle X-ray scattering data indicated that the polyimides were amorphous. Dense membranes were prepared by solution casting and solvent evaporation to evaluate their gas transport properties (permeability, diffusivity, and solubility coefficients) toward pure hydrogen, helium, oxygen, nitrogen, methane, and carbon dioxide gases. In general, the gas permeability was increased as both the fractional free volume and d-spacing were also increased. A good combination of permeability and selectivity was promoted efficiently by the bulky hexafluoroisopropylidene and 4-fluoro-phenyl groups introduced into the polyimides. The results indicate that the gas transport properties of these films depend on both the structure of the anhydride moiety, which controls the intrinsic intramolecular rigidity, and the 4-fluoro-phenyl pendant group, which disrupts the intermolecular packing.