bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Psychological Effect of Forming WeChat Groups Between Medical Staff and Patients With COVID-19
Authors: Yuan Li-Ping , Yu Zheng-Hao , Zhang Xian-Cui , Zhang Wei , Jin Ling-Li , Wang Zhen , Yang Jin-Sun , Huang Hou-Bao , Zhang Qu , Tao Xiu-Bin 
Published: June 2021

Background: This study was conducted in order to explore the effect of psychological intervention based on the use of WeChat with coronavirus disease 2019 (COVID-19) patients.Methods: A total of 65 patients with COVID-19, from two wards, were divided into an experimental group and a control group with the ward as the basic unit. Communication concerning routine treatment and nursing was established between the medical staff and patients in the experimental group via WeChat groups. Within 48 h of admission, at 7 days, and on discharge, all 65 patients completed two self-evaluation questionnaires: the Positive and Negative Affect Schedule (PANAS) and the Hospital Anxiety and Depression Scale (HADS). Hospital stay statistics and a satisfaction survey on discharge were also collated for both groups of patients.Results: The PANAS scores of the experimental group were 26.61 ± 7.99 points on admission, 20.81 ± 5.48 points at 7 days, and 19.58 ± 6.61 points on discharge (P &lt; 0.05). The scores of HADS in the experimental group were 27.74 ± 9.35 points on admission, 12.19 ± 1.92 points at 7 days, and 11.71 ± 3.64 points on discharge (P &lt; 0.05). The differences in the PANS and HADS scores between the experimental and control groups at 7 days and on discharge were statistically significant. The discharge satisfaction ratings of the two groups of patients were 99.87 ± 0.34 and 98.68 ± 1.09 points, the difference being statistically significant (t = 5.827, P &lt; 0.05).Conclusion: Establishing WeChat groups between medical staff and patients with COVID-19 and building a bridge for better communication improved patients' positive mentality and their compliance with doctors, shortened their hospital stay, and promoted their recovery.
Rapid Point-Of-Care Serology and Clinical History Assessment Increase Protection Provided by RT-PCR Screening: A Pilot Study Involving Three Nursing Homes in Brescia, a Hotspot of Lombardy
Authors: Savio Antonella , Calza Stefano , Guerrini Gianbattista , Romano Valentina , Marchina Eleonora 
Published: June 2021

Background: COVID-19 outbursts have been registered worldwide within care homes with asymptomatic transmission combined with shortage/inaccuracy of diagnostic tests undermining the efforts at containment of the disease. Nursing facilities in Lombardy (Italy) were left with no, or limited, access to testing for 8 weeks after the outbreak of COVID-19.Methods: This study includes 246 residents and 286 workers of three different nursing homes in Brescia-Lombardy. Clinical questionnaires and rapid serology tests were devised to integrate the data of the first available RT-PCR screening. Follow-up serology after 60-days was performed on 67 of 86 workers with positive serology or clinically suspicious.Findings: Thirty-seven residents and 18 workers had previous positive RT-PCR. Thorough screening disclosed two additional RT-PCR-positive workers. Serology screening revealed antibodies in 59 residents and 48 workers, including 32/37 residents and all workers previously positive at RT-PCR. Follow up serology disclosed antibodies in two additional workers with recent symptoms at the time of screening. The professionals in close contact with residents had more infections (47/226–20.79% vs. 1/60–1.66%; p = 0.00013 Fisher exact-test). A suspicious clinical score was present in 44/64 residents and in 41/50 workers who tested positive with either method with totally asymptomatic disease more frequent among residents 28.1 vs. 10.0% (p = 0.019 Fisher exact-test).Interpretation: Based on the available RT-PCR ± results at the time of symptoms/contacts, our integrated clinical and serological screening demonstrated sensitivity 89% and specificity 87%. This multimodal assessment proved extremely useful in understanding the viral spread in nursing homes, in defining its stage and in implementing protective measures. Rapid serology tests demonstrated efficient and particularly suited for older people less able to move/cooperate.
Symptom Prediction and Mortality Risk Calculation for COVID-19 Using Machine Learning
Authors: Jamshidi Elham , Asgary Amirhossein , Tavakoli Nader , Zali Alireza , Dastan Farzaneh , Daaee Amir , Badakhshan Mohammadtaghi , Esmaily Hadi , Jamaldini Seyed Hamid , Safari Saeid , Bastanhagh Ehsan , Maher Ali , Babajani Amirhesam , Mehrazi Maryam , Sendani Kashi Mohammad Ali , Jamshidi Masoud , Sendani Mohammad Hassan , Rahi Sahand Jamal , Mansouri Nahal 
Published: June 2021

Background: Early prediction of symptoms and mortality risks for COVID-19 patients would improve healthcare outcomes, allow for the appropriate distribution of healthcare resources, reduce healthcare costs, aid in vaccine prioritization and self-isolation strategies, and thus reduce the prevalence of the disease. Such publicly accessible prediction models are lacking, however.Methods: Based on a comprehensive evaluation of existing machine learning (ML) methods, we created two models based solely on the age, gender, and medical histories of 23,749 hospital-confirmed COVID-19 patients from February to September 2020: a symptom prediction model (SPM) and a mortality prediction model (MPM). The SPM predicts 12 symptom groups for each patient: respiratory distress, consciousness disorders, chest pain, paresis or paralysis, cough, fever or chill, gastrointestinal symptoms, sore throat, headache, vertigo, loss of smell or taste, and muscular pain or fatigue. The MPM predicts the death of COVID-19-positive individuals.Results: The SPM yielded ROC-AUCs of 0.53–0.78 for symptoms. The most accurate prediction was for consciousness disorders at a sensitivity of 74% and a specificity of 70%. 2,440 deaths were observed in the study population. MPM had a ROC-AUC of 0.79 and could predict mortality with a sensitivity of 75% and a specificity of 70%. About 90% of deaths occurred in the top 21 percentile of risk groups. To allow patients and clinicians to use these models easily, we created a freely accessible online interface at www.aicovid.net.Conclusion: The ML models predict COVID-19-related symptoms and mortality using information that is readily available to patients as well as clinicians. Thus, both can rapidly estimate the severity of the disease, allowing shared and better healthcare decisions with regard to hospitalization, self-isolation strategy, and COVID-19 vaccine prioritization in the coming months.
A Novel Approach to 1RM Prediction Using the Load-Velocity Profile: A Comparison of Models
Authors: Thompson Steve W. , Rogerson David , Ruddock Alan , Greig Leon , Dorrell Harry F. , Barnes Andrew 
Published: June 2021

The study aim was to compare different predictive models in one repetition maximum (1RM) estimation from load-velocity profile (LVP) data. Fourteen strength-trained men underwent initial 1RMs in the free-weight back squat, followed by two LVPs, over three sessions. Profiles were constructed via a combined method (jump squat (0 load, 30–60% 1RM) + back squat (70–100% 1RM)) or back squat only (0 load, 30–100% 1RM) in 10% increments. Quadratic and linear regression modeling was applied to the data to estimate 80% 1RM (kg) using 80% 1RM mean velocity identified in LVP one as the reference point, with load (kg), then extrapolated to predict 1RM. The 1RM prediction was based on LVP two data and analyzed via analysis of variance, effect size (g/ηp2), Pearson correlation coefficients (r), paired t-tests, standard error of the estimate (SEE), and limits of agreement (LOA). p < 0.05. All models reported systematic bias < 10 kg, r > 0.97, and SEE < 5 kg, however, all linear models were significantly different from measured 1RM (p = 0.015 <0.001). Significant differences were observed between quadratic and linear models for combined (p < 0.001; ηp2 = 0.90) and back squat (p = 0.004, ηp2 = 0.35) methods. Significant differences were observed between exercises when applying linear modeling (p < 0.001, ηp2 = 0.67–0.80), but not quadratic (p = 0.632–0.929, ηp2 = 0.001–0.18). Quadratic modeling employing the combined method rendered the greatest predictive validity. Practitioners should therefore utilize this method when looking to predict daily 1RMs as a means of load autoregulation.
La tour « Jean sans Peur », une épave de la résidence parisienne des ducs de Bourgogne
Authors: Plagnieux Philippe 
Published: June 2021

The Jean sans Peur Tower, a remnant of the Parisian house of the dukes of Burgundy.
The Jean sans Peur Tower is the last element left of the Parisian house of the dukes of Burgundy. The archeological study shows that it was built in one piece, though the reverse is generally admitted, in one campaign for Jean sans Peur. The tower did not stand alone, but three bodies which stood on three of its sides were linked to it. It housed the great staircase which should be compared to the contemporary protruding spiral staircases, such as that in Charles V’s Louvre.
L’utilisation du répertoire figuratif dans l’art celtique ancien
Authors: Verger Stéphane 
Published: June 2021

The use of a figurative repertory in early Celtic art.
Figurative representations are rare in old Celtic art, and are generally limited to certain age groups (young women and children) and to certain specific categories of individuals : figures in the tomb, accompanied by ostentatious funeral items. The animals that may be depicted on personal objects show an original organization of the animal kingdom. Bovidae and palmipeds, on the one hand, are never associated with deer, rams or predatory animals, on the other. In the richest tombs a few simple iconographical programmes may be identified. Images in which animals and human figures appear together have diverse forms. They seem to point to the existence of an iconographical grammar which is specifically transalpine.
Aux origines de la céramologie grecque : l’étude des vases attiques avant Beazley
Authors: Rouet Philippe 
Published: June 2021

The fundamental work carried out by Sir John Beazley cast all the research of his predecessors into a kind of pre-history. The study of this pre-history is nonetheless interesting, if only to measure the decisive importance of Beazley’s contribution.
This article begins by looking at the
historical misunderstanding which for a long time
mistook Greek vases found in Italy for
Etruscan vases. The author then goes on to examine
the work of three German scholars from
the second half of the nineteenth century, and their
different ways of tackling the problem of the
identification of the artists who designed and
realised these vases. Wilhelm Klein gave the first
interpretation of the signatures which sometimes feature
on these vases. Paul Hartwig developed a comparative
method enabling him to attribute certain
anonymous vases by criteria of style. Adolf Furtwàngler,
assisted by Karl Reichold, produced some
masterly transcriptions, turning the decoration of the
vases into real pictures. In his view, most of
these vases were copies or more or less distant echoes
of great lost paintings, still known to us
through textual evidence.
Un artiste et un marchand collectionneurs. Première lecture de la correspondance inédite entre Jean Dubuffet et Pierre Matisse
Authors: Jakobi Marianne 
Published: June 2021

Two collectors : an artist and his dealer. First reading of the unpublished correspondence between Jean Dubuffet and Pierre Matisse.
The study of the unpublished correspondence (from 1945 to 1960) between Jean Dubuffet and Pierre Matisse, his dealer in New York, was achieved through documents kept in the Fondation Dubuffet (Paris) and the Pierpont Morgan Library (New York). The author puts forward a periodicization of this corpus and underscores the tensions between the artist and the art-dealer. Their difficulty in keeping to their given roles is increased by the fact that both collect the painter’s works. Their correspondence allows to give back to the Pierre Matisse Gallery the importance it had in diffusing Dubuffet’s works through the United States. Dubuffet’s letters give a precious account about his work and his pictorial techniques. They also allow for a questioning of his strategies and his own image of his work’s reception.
Modulations sur la toile : La Reine Blanche d’Albert Edelfelt (1854-1905)
Authors: Kilpinen Tuulikki 
Published: June 2021

Modulations on canvas : La Reine Blanche by Albert Edelfelt (1854-1905)
This article analyses the making by the Finnish painter Edelfelt of an historical oil painting in the Academic style. Technical art history was the main research and was based on close collaboration between two specialists : an art historian and a conservator. The painting was visually examined as well as scientifically analysed. The information obtained was compared with the remarks from 23 letters of the artist and with 17 painted or drawn sketches linked to the painting. The work was painted in Paris in 1876-77, while Edelfelt studied at the Ecole des Beaux-arts under the tutorship of Jean-Léon Gérôme. This article gives precise information regarding Gérôme’s training methods, including initial preparation, the actual painting process and the final touch. This investigation reveals how long and segmented a process the painting underwent before it was finally displayed in the Salon.
„I did it my way”: Czy to koniec współpracy Zjednoczonego Królestwa i Unii Europejskiej w sprawach zagranicznych, bezpieczeństwa i obrony?
Authors: Suwara Ewa M. 
Published: June 2021

31 December 2020 marks end of the “transition period” indicated in the Agreement on the Withdrawal of the United Kingdom from the European Union. Until the end of this period, the subject of future cooperation in foreign affairs, security and defence has not been negotiated within the BREXIT negotiations. It results in lack of its elaboration in a form of a written agreement on future relations between both Parties in this area. The main objective of this publication is to discuss cooperation between the United Kingdom and the EU in foreign affairs, security and defence as of 1 January 2021, following the end of “transition period” stipulated in the Agreement, considering that it has not been negotiated between the Parties. In this publication, the author discusses negotiation strategy adopted by the United Kingdom, the EU proposal of regulating future relations in foreign affairs, defence and security, as well as presents the forms of cooperation with third states applied so far by the EU. The publication indicates the impact of the BREXIT for the future cooperation in foreign affairs, defence and security. The author argues that the strategy of negotiation adopted by the United Kingdom on future cooperation in the foreign affairs, defence and security was well planned, and does not constitute an obstacle for deepening the future relations between the United Kingdom and the EU.
El sistema de evaluación del gasto público en México en los proyectos de Presupuesto de Egresos de la Federación 2018 y 2021: avances y retrocesos
Authors: Ibarra Pardo Luis Alberto 
Published: June 2021

Una de las reformas estructurales más importantes, aún pendientes, que debe emprender México en los próximos años es la reforma del gasto público, incluyendo uno de sus componentes principales, que es la forma en que dicho gasto se evalúa. Para ello, en este trabajo se presentan algunos avances y deficiencias del sistema de evaluación del desempeño (SED) del gasto público en los proyectos de Presupuesto de Egresos de la Federación (PEF) para 2018 y 2021. El análisis se basa en la literatura de los modelos de agente-principal, donde pueden existir problemas de desalineación de intereses entre el principal, esto es, los ciudadanos, y el agente, es decir, el gobierno, que es «contratado» por los primeros, mediante las elecciones, para cumplir con los objetivos de crecimiento económico e inclusión social. Al final, se presenta una propuesta de política pública para incorporar al SED los principios de simplicidad, relevancia, objetividad, incentivación y actualización.
Modeling of Operating Modes Gas Composite Cylinders
Authors: Осипова Н. Н. , Гришин Б. М. 
Published: June 2021

Состояние проблемы. Появление на рынке композитных баллонов обеспечивает ряд технологических и эксплуатационных преимуществ по сравнению с металлическими баллонами сжиженного углеводородного газа. В то же время отсутствие в научной литературе обоснованных рекомендаций по определению паропроизводительности баллонов по режимам их эксплуатации ограничивает их широкое внедрение в газовую практику. Результаты. Разработана математическая модель, учитывающая эксплуатацию баллона в режиме периодического газопотребления, рассчитан коэффициент неравномерности газопотребления в течение суток, определены значения коэффициента теплопередачи стенки композитного баллона, получена аппроксимирующая зависимость коэффициента теплопередачи от уровня заполнения баллона газом. Выводы. В результате проведенных исследований установлены критерии, влияющие на паропроизводительность композитных баллонов сжиженного углеводородного газа в различных режимах эксплуатации.
Statement of the problem. The emergence of composite cylinders on the market offers a range of technological and operational advantages in comparison with metal cylinders of liquefied hydrocarbon gas. At the same time, the absence of substantiated recommendations for determining the vapor capacity of cylinders by modes of their operation in the scientific literature limits their wide implementation into gas practice. Results. A mathematical model considering the operation of the cylinder in the mode of periodic gas consumption is developed, the coefficient of non-uniformity of gas consumption during the day is calculated, the values of the heat transfer coefficient of the composite cylinder wall are identified, the approximate dependence of the heat transfer coefficient is obtained. Conclusions. As a result of the research, the criteria influencing steam productivity of composite cylinders of the liquefied hydrocarbon gas in various operating modes are found.
Spectrum of Own Frequencies of a Spatial Surfacing Grid
Authors: Кирсанов М. Н. 
Published: June 2021

Постановка задачи. Рассматривается схема статически определимой фермы пространственного прямоугольного покрытия. Ставится задача найти формулу зависимости нижней оценки первой частоты собственных колебаний конструкции по методу Донкерлея от числа панелей. Ферма имеет опоры по сторонам и состоит из отдельных стержневых ячеек, соединенных в пирамиды. Результаты. Из анализа последовательности аналитических решений для первой частоты ферм с различным числом панелей методом индукции выводятся коэффициенты в искомой формуле. Общие члены последовательностей коэффициентов находятся как решения однородных рекуррентных уравнений, образованных по результатам расчетов с помощью операторов Maple . Найденные зависимости получены в виде полиномов по числу панелей. Дано сравнение аналитического решения с численным. Выводы. Приведен алгоритм вывода аналитической оценки основной частоты колебаний пространственной конструкции в зависимости от числа панелей, массы, размеров и упругих свойств материала. Проанализирован спектр частот колебаний сооружения. Найденные зависимости могут быть использованы в задачах сейсмостойкости и оптимизации конструкции.
Statement of the problem. The scheme of a statically definable truss of a spatial rectangular covering is discussed. The problem is to identify the formula for the dependence of the lower estimate of the first frequency of the natural oscillations of the structure by means of the Donkerley method on the number of panels. The truss has supports on the sides and consists of separate rod cells connected in pyramids. Results. Based on the analysis of the sequence of analytical solutions for the first frequency of trusses with a different number of panels by induction, the coefficients in the desired formula are derived. The common members of the sequences of coefficients are found as solutions of homogeneous recurrent equations formed according to the results of the calculations using Maple operators. The resulting dependences are obtained in the form of polynomials by the number of panels. A comparison of the analytical solution with the numerical one is provided. Conclusions. An algorithm for deriving an analytical estimate of the fundamental frequency of oscillations of a spatial structure depending on the number of panels, mass, size, and elastic properties of the material is shown. The spectrum of oscillation frequencies of the structure is analyzed. The resulting dependences can be employed in seismic and structural optimization problems.
Metastatic Lesion of the Vertebra in Prostate Cancer and Complex Instrumental Diagnostics
Authors: Kochergina N. V. , Prokhorov S. N. , Tkachev S. I. , Ryzhkov A. D. , Bludov A. B. 
Published: June 2021

Purpose: To conduct a retrospective analysis of the clinical case of metastatic vertebral lesion in prostate cancer and the algorithm for the use of instrumental diagnostic methods.Material and methods: Patient 67 years old. History of prostatectomy for prostate cancer. Suspected metastatic lesion of the left transverse process of the 7th thoracic vertebra based on PET/CT. For clarification, MRI, Skeletal scintigraphy, SPECT/CT were performed.Conclusion: Access to a wide range of instrumental methods does not guarantee correct diagnosis. Modality, research methodology, time between the first and clarifying methods — all these factors affect the correct diagnosis, the choice of the treatment method, the timeliness of the start of treatment and, as a result, the fate of the patient.
A Stellar Mass Dependence of Structured Disks: A Possible Link with Exoplanet Demographics
Authors: van der Marel Nienke , Mulders Gijs D. 
Published: June 2021

Abstract
Gaps in protoplanetary disks have long been hailed as signposts of planet formation. However, a direct link between exoplanets and disks remains hard to identify. We present a large sample study of ALMA disk surveys of nearby star-forming regions to disentangle this connection. All disks are classified as either structured (transition, ring, extended) or nonstructured (compact) disks. Although low-resolution observations may not identify large-scale substructure, we assume that an extended disk must contain substructure from a dust evolution argument. A comparison across ages reveals that structured disks retain high dust masses up to at least 10 Myr, whereas the dust mass of compact, nonstructured disks decreases over time. This can be understood if the dust mass evolves primarily by radial drift, unless drift is prevented by pressure bumps. We identify a stellar mass dependence of the fraction of structured disks. We propose a scenario linking this dependence with that of giant exoplanet occurrence rates. We show that there are enough exoplanets to account for the observed disk structures if transitional disks are created by exoplanets more massive than Jupiter and ring disks by exoplanets more massive than Neptune, under the assumption that most of those planets eventually migrate inwards. On the other hand, the known anticorrelation between transiting super-Earths and stellar mass implies those planets must form in the disks without observed structure, consistent with formation through pebble accretion in drift-dominated disks. These findings support an evolutionary scenario where the early formation of giant planets determines the disk’s dust evolution and its observational appearance.