Significant structure theory applied to liquid He

The large kinetic zero-point motion of ⁴He molecules has been properly taken into account in the significant structure theory of liquids in order to describe the liquidity of liquid ⁴He. The Debye and the Bose-Einstein partition functions are used for the solid-like molecules of the normal fluid component and for the whole gas-like molecules, respectively. The solid-like molecules of the superfluid component are considered as ground state molecules without having positional degeneracies. The Bragg-Williams approximation of an order/disorder phase transition has been applied to the λ transition of liquid ⁴He. Thermodynamic and surface properties of liquid ⁴He have been calculated up to the critical point. The results are satisfactory when compared with the observed values.     

Molecular orbital studies of ethylenediamine conformations

Semiempirical quantum mechanical treatments are applied to the ethylenediamine di-cation, mono-action, and neutral molecule by the use of the extended Huckel theory.     

Factors Associated With a Negative Emotional Response to News Media and Nationwide Emergency Text Alerts During the COVID-19 Outbreak in Korea

ObjectiveTo prevent the spread of infection in Korea during the corona virus disease 2019 (COVID-19) outbreak, real-time warnings have been sent to all residents via mobile phones. This study examined the factors associated with the negative emotional response to media news and emergency text alerts in the COVID-19 pandemic. MethodsA survey was completed by 1,500 adults from an online public panel in three regions. We used Patient Health Questionnaire-9 (PHQ-9), generalized anxiety disorder-7 (GAD-7) and Perceived Stress Scale-10 (PSS-10) to assess the level of depression, anxiety and stress, respectively. Questionnaires related to COVID-19 included fear of infection, and fear of disclose of contact-tracing information. ResultsThe negative emotional response on both news media information and emergency alert text messages about COVID-19 was associated with fear of COVID-19 infection and high anxiety. The biggest outbreak city, Daegu was associated with the less negative emotional response on emergency alert text messages. Fear of disclose of contact-tracing information was significantly associated with negative emotional perception on emergency alter text messages. ConclusionOur results suggest that effective information providing services with considering vulnerable groups are needed to promote acceptance and eliminate negative emotion for disease related information.     

Prevalence of multiple sclerosis in Bogotá, Colombia

Among Latin American countries, Colombia is considered a low-risk area for multiple sclerosis (MS) and no studies on MS prevalence have been conducted in any of the country's large urban settings. To fill this gap and assess the prevalence of MS in Bogotá as of December 31, 2002, this study reviewed the clinical records of patients diagnosed with MS in most Bogotá hospitals. This review produced a sample of 296 patients with an MS diagnosis whose reliability was verified by a neurologist with expertise in MS. The total prevalence rate identified for December 2002 was 4.41/100,000 inhabitants (95% CI 3.9-4.9), including a rate of 5.98/100,000 (95% CI 5.2-6.8) for women and 2.71/100,000 (95% CI 2.2-3.3) for men (differences measured at p < 0.001). The prevalence estimates for Bogotá, confirm the city's status as a low-risk area for MS.     

Utilidad clínica de la videocápsula endoscópica en el estudio de patologías de intestino delgado en Colombia: resultados de un registro nacional

IntroductionThe small bowel capsule endoscopy (SBCE) has revolutionised the study of small bowel diseases. The objective of this study is to determine the indications, findings and diagnostic yield of SBCE in a national registry.Patients and methodsAn observational, analytical cross-sectional study was carried out, analysing the SBCE records at seven centres in the country, where different variables were collected.Results1,883 SBCEs were evaluated. The average age was 55.4 years (5.6-94.2). The most frequent indications were suspicion of small bowel bleeding (SBB) (64.4%), study of Crohn's disease (15.2%) and chronic diarrhoea (11.2%). 54.3% were prepared with laxatives. The most frequent lesions found were erosions/ulcers (31.6%), angioectasias (25.7%) and parasitosis (2.7%). The diagnostic yield (P1 + P2, Saurin classification) of SBCE in SBB was 60.6%, being higher in overt SBB (66.0%) compared to occult SBB (56.0%) (P = .003). The studies with better preparation showed higher detection of lesions (93.8% vs. 89.4%) (OR = 1.8, CI: 95%: 1.2-2.6; P = .004). The SBCE complication rate was 3.1%, with complete SB visualisation at 96.6% and SB retention rate of 0.7%. 81.5% of SBCEs were performed on an outpatient basis, and presented a greater complete SB visualisation than hospital ones (97.1% vs. 94.3%) (OR = 2.1, CI: 95%, 1.2-3.5; P = .008).ConclusionsThe indications, findings and diagnostic performance of SBCEs in Colombia are similar to those reported in the literature, with a high percentage of complete studies and a low rate of complications.     

Validation and abbreviation of an HIV stigma scale in an adult spanish-speaking population in urban Peru

The purpose of this study was to validate the Spanish version of the Berger HIV Stigma Scale in an urban Spanish-speaking population in Peru and create a valid and reliable abridged version of the scale. Participants were HIV-infected adults enrolled in an observational study to examine the effectiveness of a community-based antiretroviral therapy adherence intervention. Approximately half of participants were female, and the median age at enrollment was 30.5 years. The Spanish version of the full HIV Stigma Scale was internally reliable, demonstrated good construct validity, and was sensitive to change over time. The full HIV Stigma Scale was abbreviated by removing items that impaired subscale internal reliability, did not correlate with other subscale items, or demonstrated low factor correlations. The resulting abridged scale contained 21 of the 40 original items and revealed properties similar to the full Spanish version.     

Spatial distribution and physical activity: implications for prevention of cardiovascular diseases

Background

The current lifestyle of the population contributes to the development of cardiovascular diseases (CVD). Physical inactivity has become a major public health concern that is associated with increased risk of morbidity or worsening CVD risk factors. Studies have shown that the area of residence is associated with obesity and physical inactivity.

Aims

In this context, it has been found that the tools of geomatics help to improve public health policies since through these it is possible to improve the environment-health relationship.

Methods

PUBMED and ScienceDirect databases were searched.

Results

Spatial clustering techniques can identify high and low risk areas for physical activity and CVD risk factors. Thus, the highest levels of physical activity are concentrated in places where there is proximity to connecting areas, trails and high density of parks and green areas.

Conclusions

Therefore, the application of geomatics will allow the development of methodologies for the registration of spatiotemporal characteristics of diseases related to different characteristics of people. The present article aims to highlight the relative contribution of spatial distribution on physical activity and its implications for prevention of CVD.