Evolution of social mood in Spain throughout the COVID-19 vaccination process: a machine learning approach to tweets analysis.

OBJECTIVES: This paper presents a new approach based on the combination of machine learning techniques, in particular, sentiment analysis using lexicons, and multivariate statistical methods to assess the evolution of social mood through the COVID-19 vaccination process in Spain. METHODS: Analysing 41,669 Spanish tweets posted between 27 February 2020 and 31 December 2021, different sentiments were assessed using a list of Spanish words and their associations with eight basic emotions (anger, fear, anticipation, trust, surprise, sadness, joy and disgust) and three valences (neutral, negative and positive). How the different subjective emotions were distributed across the tweets was determined using several descriptive statistics; a trajectory plot representing the emotional valence vs narrative time was also included. RESULTS: The results achieved are highly illustrative of the social mood of citizens, registering the different emerging opinion clusters, gauging public states of mind via the collective valence, and detecting the prevalence of different emotions in the successive phases of the vaccination process. CONCLUSIONS: The present combination in formal models of objective and subjective information would therefore provide a more accurate vision of social reality, in this case regarding the COVID-19 vaccination process in Spain, which will enable a more effective resolution of problems.

A synchrotron computed tomography dataset for validation of longitudinal tensile failure models based on fibre break and cluster development.

We performed in-situ tensile tests on two carbon fibre/epoxy composites with continuous scanning using synchrotron computed tomography (CT). Both composites were cross-ply laminates, and two specimens were tested for each composite. The voxel size was sufficiently small to recognize individual fibres and fibre breaks. For each test, 16-19 volumes were reconstructed, cropped down to the 0° plies and analysed to track fibre break and cluster development. This dataset provides the last CT volume before failure for each of the four specimens as well as the individual fibre break locations in all reconstructed volumes. These data are then plotted against predictions from six state-of-the-art strength models. The target is that these data become a benchmark for the development of new models, inspiring researchers to set up refined experiments and develop improved models.

Síndrome hemolítico urémico y colecistitis por neumococo / Pneumococcus induced haemolytic-uraemic syndrome and cholecystitis

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Delayed posttraumatic hemorrhage. "Spät-apoplexie".

BACKGROUND AND PURPOSE: Delayed posttraumatic hemorrhage (DPTH) is one of the causes of intracerebral hemorrhage (ICH). Most of the published series were reported before the advent of CT. Clinical characteristics and CT findings are described. METHODS: Ten cases of CT-proven DPTH from a series of 216 patients (age range, 15 to 50 years) with ICH were evaluated. Previous CT scans performed in the first 6 hours after head injury were normal in all patients. Cerebral angiography showed no evidence of vascular disorders in any patient. RESULTS: DPTH was the fourth most common cause of ICH in our series. The symptom-free interval after head injury ranged from 1 to 15 days. Most hematomas were located deep in the hemisphere and were of small or medium size. Clinical course was good in the majority of cases; none of the patients died, and there was no recurrence. CONCLUSIONS: DPTH is a relatively frequent cause of ICH in young adults. There is no relationship with intensity of the previous head injury. The more frequent location deep in the hemisphere may be related to the younger age of our patients compared with those of other published series. The good outcome in our patients may be related to their youth and the absence of complications such as skull fracture, need for neurosurgery, or coagulation disorders.

[Migraine-infarct in patients treated with beta-blockers]. / Migraña-infarto en pacientes tratados con bloqueadores beta.

Migraine in itself is a potential cause of cerebral infarct in young adults. However the mechanism of migrainous ictus is open to discussion. Some drugs (oral anticonceptives, ergotaminics) could favor its appearance. Three cases has described in the medical literature of migraine patients in whom betablockers administration has been related with onset of an ischemic ictus. We present two new cases of this association. Nonselective betablockers provoke an increase in platelet activity by stimulation of platelet alpha-2 receptors; this together with their vasoconstrictor effect could favor the apparition of cerebral infarction in patients with migraine. We suggest, following other authors, to include non selective betablockers in the group of drugs which have to be carefully managed in the patients with migraine, especially in those with the classical type (migraine with aura) in whom an initial vasoconstriction has been suggested.

[Alterations in osmoregulation in the elderly]. / Alteraciones en la osmorregulación en el anciano.

In the present work we study the modifications in hydrosaline metabolism which occurred in two groups of healthy male individuals, one consisting of 15 young men (mean age of 20 years) and the other of 30 elderly subjects (mean age of 75 years) when the thirst test was performed for 48 hours. After performing the thirst test we observed that the elderly were less thirsty than the young group and that the former presented more marked alterations in the hydrosaline metabolisms. Thus, the elderly presented at the end of the test higher serum and urine sodium levels, a greater serum osmolarity and higher plasmatic ADH levels both basal and at the end of the test. However, inspite of all this, the elderly scarcely reduced their diuresis and urinary osmotic values were much lower (almost half) than the young subjects. The mechanism for which these alterations occur is probably multifactorial, in which the decrease in glomerular filtrate, the increase in filtration fraction, the proportional increase in medullar flux together with some tubular resistance to ADH action could intervene.

Prevalence of multiple sclerosis in Lanzarote (Canary Islands)

In the island of Lanzarote of the Province of Las Palmas, which is part of the Spanish archipelago of the Canary Islands, the prevalence of multiple sclerosis is 15 per 100,000. The prevalence of MS in Lanzarote seems related more to ethnic conditions than to geography.

[Acute intermittent porphyria versus porphyria variegata: a diagnostic uncertainty (author's transl)]. / Porfiria aguda intermitente versus porfiria variegata: una incertidumbre diagnóstica.

The authors study a case of acute porphyria in a young woman who was taking oral contraceptives and who began having abdominal pain and bilateral radial paralysis with neuropsychic disorders. The quantitative and chromatographic analyses of urine, feces, and liver porphyrins revealed a pattern of excretion compatible but not definite of porphyria variegata, making this an example of porphyria of difficult noslogic placement. The problems of classification, the action of the contraceptive drugs as probable triggering agents (of the clinical picture) by means of their action on the ALA-synthetase, the rare form of neuropathy, and the rarity of these types of porphyrias in our country are analyzed and discussed. The patient did not present the endocrine-metabolic disorders that are commonly evidenced in these cases.

PIP: The article reports on the case of a 27 year old woman on oral contraceptives who developed abdominal pain, bilateral radial paralysis, and neuropsychic disorders, the classic symptoms of acute, intermittent porphyria. Complete laboratory analyses and tests revealed a pattern of disease similar but not equal to that of porphyria variegata; also, the endocrin and metabolic disorders were not those common in porphyria variegata. Both types of porphyria are very infrequent cases in Spain; the problem of diagnosis, and of the possible influence of oral contraceptives are discussed.