bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influencing Factors Associated With Mental Health Outcomes Among Dental Medical Staff in Emergency Exposed to Coronavirus Disease 2019: A Multicenter Cross-Sectional Study in China
Authors: Chen Yaopian , Li Wei 
Published: October 2021

Background: The epidemic infection of coronavirus disease 2019 (COVID-19) may have a profound impact on dentistry, mainly due to the mode of transmission of the pathogen, which poses a risk to almost all dental operations. Therefore, this study aimed to investigate the prevalence and influencing factors of anxiety, depression, perceived stress, and acute stress disorder among dental medical staff in emergency situations during the COVID-19 epidemic.Methods: From April 3, 2020, to April 10, 20204, a multicenter cross-sectional study was conducted among 808 first-line dental professionals at an emergency department in mainland China. A self-designed questionnaire was used to collect general demographic information. The 7-item Generalized Anxiety Disorder Scale (GAD-7), 9-item Patient Health Questionnaire (PHQ-9), 10-item Perceived Stress Scale (PSS-10), and Acute Stress Disorder Scale (ASDS) were used to assess the severity of symptoms of anxiety, depression, perceived stress, and acute stress disorder (ASD), respectively.Results: The prevalence rates of depression, anxiety, perceived pressure, and ASD among the frontline dental medical staff were 46.4, 36.3, 65.2, and 1.1%, respectively. The frontline dental medical staff who were working in the Wuhan area reported experiencing more anxiety (p = 0.038) and perceived stress (p &lt; 0.001) compared with those who were not working in the Wuhan area. The frontline dental medical staff who were working in a general hospital reported experiencing more dissociation symptoms (p = 0.001) compared with those working in a specialized or private hospital. Individuals with a past medical history reported experiencing more anxiety (p = 0.009), depression (p &lt; 0.001), and perceived stress (p = 0.003) than those without, and individuals with lower levels of education showed higher levels of anxiety (p = 0.038). Binary logistic regression analysis results (after controlling for other confounders) suggested that having a past medical history was a risk factor for both anxiety (p = 0.002; OR = 2.441; 95% CI, 1.384–4.306) and perceived stress (p = 0.001; OR = 1.417; 95% CI, 1.145–1.754).Conclusions: The prevalence of mental symptoms was high among the first-line emergency dental staff. Male sex, working in the Wuhan area, working in a general hospital, a past medical history, and lower levels of education were risk factors. Therefore, we need to pay close attention to the mental health problems of frontline dentists during the COVID-19 outbreak and adopt active preventive strategies to maintain their physical and mental health.
Are in Person and Telephone Interviews Equivalent Modes of Administrating the CAT, the FACIT-FS and the SGRQ in People With COPD?
Authors: Rocha Vânia , Jácome Cristina , Martins Vitória , Marques Alda 
Published: October 2021

Background: The COVID-19 pandemic brought numerous challenges, namely in routine assessment of people with chronic obstructive pulmonary disease (COPD). The COPD Assessment Test (CAT), the Functional Assessment of Chronic Illness-Fatigue-Subscale (FACIT-FS) and the St. George's respiratory questionnaire (SGRQ) are important patient-reported outcome measures used to assess people with COPD, but its face-to-face application has been compromised. The telephone interview offers a simple and effective alternative, yet uncertainty regarding its equivalence remains. This study aimed to establish the reliability and validity of the CAT, the FACIT-FS and the SGRQ administered by telephone interview in people with COPD.Methods: Data from an observational prospective study including people with COPD were analyzed. Participants answered to the CAT, FACIT-FS and SGRQ questionnaires in person and by telephone, with a maximum interval of 48-h. Participants were randomly selected to answer first to the in-person questionnaire followed by telephone or vice versa. Reliability measures included internal consistency with Cronbach's alpha, test-retest reliability with the intraclass correlation coefficient (ICC2,1), test-retest measurement error with the standard error of measurement (SEM) and agreement with the Bland and Altman 95% limits of agreement. Validity was assessed with the Spearman correlation (rho).Results: Fifty-five people with COPD (44 men; 68.1 ± 7.9 years; FEV1: 59.1 ± 20.3% predicted) were included. Similar internal consistency was observed between in person vs. telephone interview for the CAT (0.82 vs. 0.84), the FACIT-FS (0.83 vs. 0.84) and the SGRQ (0.92 vs. 0.93). Test-retest reliability was excellent, with an ICC2,1 of 0.77 (95% CI: 0.65; 0.86), 0.86 (95% CI: 0.77; 0.92) and 0.94 (95% CI: 0.90; 0.96) for the CAT, FACIT-FS and SGRQ total scores, respectively. The SEM showed a low level of associated measurement error and the Bland and Altman plots illustrated a good level of agreement between both modes of administration, with no evidence of systematic bias. Robust positive correlations (rho 0.87–0.94, p &lt; 0.001) were found for the CAT, FACIT-FS and SGRQ total scores applied by both methods.Conclusion: The telephonic administration of the CAT, the FACIT-FS and the SGRQ are a valid and reliable alternative approach to in person interviews for monitoring symptoms and health-related quality of life in people with COPD. The telephone might be an important add-on for personalized assessment and management of COPD thru remote monitoring.
Performance of Computed Tomography Angiography Before Revascularization Is Associated With Higher Amputation-Free Survival in Rutherford IIb Acute Lower Limb Ischaemia
Authors: Saphir Ebba , Svensson-Björk Robert , Acosta Stefan 
Published: October 2021

Background: Acute lower limb ischemia with a motor deficit (Rutherford IIb) needs urgent revascularization to avoid major amputation and mortality. It is unclear whether immediate revascularization without performing CT angiography (CTA) prior to revascularization in Rutherford IIb acute lower limb ischemia (ALI) is associated with better outcomes.Methods: Retrospective observational study of Rutherford IIb ALI patients treated between 2006 and 2018. A propensity score adjusted analysis was performed to compare outcomes after the performance of CTA examination or not.Results: Among 681 patients, 260 had Rutherford IIb ALI. CTA prior to revascularization was performed in 131 (50.4%) and increased (p &lt; 0.001) throughout the study period. Open vascular and endovascular surgery was first performed in 147 (56.5%) and 113 (43.5%) patients, respectively. The proportion of endovascular treatment increased while the open vascular surgery decreased during the study period (p = 0.031). In the propensity score adjusted analysis, the performance of CTA was associated with decreased risk of combined major amputation /mortality (odds ratio 0.52, 95% confidence interval 0.27–0.99; p = 0.046) at 1 year.Conclusion: Performance of CTA was associated with a higher amputation-free survival in revascularized patients with Rutherford IIb ALI. CTA seem to provide guidance in selecting the most appropriate candidates for revascularization and choice of technique.
The effect of cryopreservation on the parameters of mononuclear apoptosis during extracorporeal photopheresis
Authors: Vasilyeva V. A. , Kuzmina L. A. , Petinati N. A. , Drize N. I. , Kamelskikh D. V. , Gaponova T. V. , Nikiforova K. A. , Davidova Yu. O. , Kapranov N. M. , Galtceva I. V. , Parovichnikova E. N. , Savchenko V. G. 
Published: October 2021

Introduction. The mechanism of action of extracorporeal photopheresis (ECP) is associated with the induction of apoptosis of lymphocytes, which cause the activation of antigen-presenting cells (APC). As a result of the use of ECF, the number of T-regulatory lymphocytes increases, which induces an immunosuppressive effect. The actual problem lies in the use of cryopreserved and photo-irradiated mononuclear cells.Aim — to analyze the functional features of cryopreserved mononuclear cells after ECP.Materials and methods. The study analyzed the indicators of early and late stages of apoptosis in the concentrate of mononuclear cells of different groups, depending on the time of collection and the type of exposure on these concentrates of mononuclear cells: immediately after apheresis (groups 1.1 and 1.2), and after ECP (groups 1.3, 2.1 and 2.2), groups 1.2 and 2.2 were after cryopreservation, and 1.3 — after cryopreservation, and then after ECP. 113 samples of mononuclear cell concentrates obtained from 12 patients with chronic graft-versus-host reaction (GVHD) were analyzed. All groups of samples were cultured to determine the dynamics of changes in indicators of early and late stages of apoptosis over time.Results. The proportion of lymphocytes in the late stage of apoptosis after 2 days cultivation, after the standard ECP procedure, was comparable to the proportion of lymphocytes in the late stage of apoptosis during ECP followed by cryopreservation of the leukoconcentrate.Conclusion. It is advisable to collect mononuclear cells, perform their extracorporeal photo-irradiation, and then divide the photo-irradiated mononuclear cells into several parts both for cryopreservation and for the return of non-cryopreserved photo-irradiated mononuclear cells to the patient.
Kaposi’s sarcoma in HIV-negative patient with primary myelofi brosis
Authors: Egorova E. K. , Melikyan A. L. , Subortseva I. N. , Domonova E. A. , Silveystrova O. Y. , Chebotarev D. I. , Kovrigina A. M. 
Published: October 2021

Introduction. Kaposi’s sarcoma (КS) is a multi-focal malignant tumor of vascular origin with a predominant lesion of the skin, involving internal organs and lymph nodes. Epidemic and immunosuppressive variants of the disease are considered to be the most studied and common. The main reason for the development of the immunosuppressive variant is the use of immunosuppressive drugs in patients after transplantation of solid organs. Descriptions of the development of Kaposi’s sarcoma in patients with diseases of the hematopoietic system are rare.Aim — to describe a rare combination of a malignant tumor of vascular origin (Kaposi’s sarcoma) and a chronic myeloproliferative disease: primary myelofi brosis.Main findings. To verify the diagnosis of Kaposi’s sarcoma in a patient with primary myelofi brosis, the following were used: histological, immunohistochemical studies of skin biopsies and the polymerase chain reaction method with detection of a fl uorescent signal in “real time” in biological material samples (peripheral blood, smear from the mucous membrane of the oropharynx, skin biopsies from lesions) with quantitative determination of the activity of the human herpes virus 8. A comprehensive examination made it possible to establish the fi nal diagnosis of multiple malignant neoplasms and recommend treatment.
Image of the leader as a part of the organizational culture of the educational organization
Authors: Щеткина М.А. 
Published: October 2021

в статье рассмотрена проблема формирования имиджа руководителя в рамках образовательной организации и влияние имиджа руководителя на ее организационную культуру. Обозначена взаимосвязь между управленческой деятельностью руководителя и качеством работы элементов организационной культуры, определены аспекты имиджа руководителя, которые влияют на формирование организационной культуры. Описаны особенности управленческой деятельности руководителя в образовательной организации и характер формирования имиджа в организациях данного типа. Раскрыта проблема влияния имиджа руководителя на имидж образовательной организации. Определены составляющие имиджа руководителя образовательной организации.
the article discusses the problem of forming the image of a leader within an educational institution and the influence of the image of a leader on the organizational culture of an educational institution. The relationship between the manager's managerial activity and the quality of work of the elements of the organizational culture is indicated, aspects of the manager's image that affect the formation of the organizational culture are determined. The features of the managerial activity of the head in an educational institution and the nature of the formation of the image in institutions of this type are described. The problem of the influence of the image of the head of an educational institution on the image of an organization is revealed. The components of the image of the head of an educational institution have been determined.
Tools and methods of distance learning in the system of professional development of company employees
Authors: Юеин Ян. , Демина В.В. 
Published: October 2021

статья посвящена вопросу дистанционных технологий в обучении персонала компаний. Сетевое дистанционное образование – это комплексное использование новой модели образования и обучения с помощью современных коммуникационных технологий, мультимедийных технологий и сетевых технологий. Из-за многих преимуществ его методика значительно отличается от методики традиционной модели образования, поэтому используется больше в системе повышения квалификации сотрудников. Приоритетным становится изучение и внедрение инновационных моделей образования, которые больше подходят для корпоративного обучения.
the article is devoted to the issue of remote technologies in the training of company personnel. Online distance education is a comprehensive use of a new model of education and training with the help of modern communication technologies, multimedia technologies and network technologies. Due to many advantages, its methodology differs significantly from the methodology of the traditional model of education, so it is used more in the system of professional development of employees. The priority is the study and implementation of innovative educational models that are more suitable for corporate training.
Introduction of digital technologies in Russian schools
Authors: Ермакова М.П. 
Published: October 2021

в настоящей статье рассмотрены проблемы перехода от традиционных методик образования к цифровым. Представлены существующие сервисы для онлайн-обучения. Рассмотрены плюсы и минусы цифровизации, а также ее необходимость для достойного будущего России.
the article deals with the problems of transition from traditional methods of education to digital ones. The existing services for online learning are presented. The pros and cons of digitalization, as well as its necessity for a decent future of Russia, are considered.
Ethnicity and identity: a space for constructing reality
Authors: Хабенская Е.О. 
Published: October 2021

российские этнологи обсуждали природу этнических феноменов на протяжении нескольких десятилетий, но так и не пришли к консенсусу. Пришедший на смену теории этноса западный конструктивистский подход к этничности достаточно глубоко проник в российскую науку, но почти не затронул политику. Российская национальная политика, в целом, так и осталась на уровне ленинско-сталинской трактовки нации. Хотя современные законодательные акты в этой сфере и пополнились новой терминологией, объектами «национальной политики» в России по-прежнему остаются мифические этнические общности, а не права отдельного индивида и его идентичность. Автор полагает некорректным в нынешней реальности говорить об объективном существовании этнических групп, которые не имеют ни объективных характеристик, ни понятных границ. В условиях перманентной культурной трансформации и глобализации мира единственным признаком этнической принадлежности становится этническая идентичность конкретного индивида, которая определяется индивидуальными факторами, является изменчивым, ситуативным и многослойным феноменом.
Russian ethnologists have been discussing the nature of ethnic phenomena for several decades but have not come to a consensus. The Western constructivist approach to ethnicity, which replaced the theory of ethnicity, penetrated quite deeply into Russian science, but almost did not affect politics. Russian national policy has remained at the level of the Leninist-Stalinist interpretation of the nation. Although modern legislative acts in this area have been supplemented with new terminology, the objects of "national policy" in Russia are still mythical ethnic communities, and not the rights of an individual and his identity. The author believes that it is incorrect in the current reality to talk about the objective existence of ethnic groups that have neither objective characteristics nor understandable boundaries. In the conditions of permanent cultural transformation and globalization of the world, the only sign of ethnicity is the ethnic identity of a particular individual, which is determined by individual factors, is a changeable, situational, and multi-layered phenomenon.
Pulsation and Rotation of the EL CVn-type Eclipsing Binary 1SWASP J024743.37-251549.2
Authors: Kim Seung-Lee , Lee Jae Woo , Lee Chung-Uk , Lee Yongseok , Lee Dong-Joo , Hong Kyeongsoo , Cha Sang-Mok , Kim Dong-Jin , Park Byeong-Gon 
Published: October 2021

Abstract
EL CVn-type eclipsing binaries are composed of a massive A-type main-sequence primary star and a hotter B-type secondary star. This paper presents the time-series photometric and asteroseismic results of the EL CVn-type star 1SWASP J024743.37-251549.2. Well-defined eclipsing light curves were constructed by using the novel high-cadence BV data and archival TESS data, and the physical parameters of each binary component were derived by modeling the light curves. Multiple frequency analysis was performed to investigate the pulsation properties of the binary components. A reliable signal could not be detected in the high-frequency region of 100–300 day−1, unlike in the previous discovery of three frequencies around 200 day−1. This indicates that the pulsation amplitudes of the prehelium white dwarf secondary component decreased considerably. By contrast, 12 frequencies were detected in the range of 33–53 day−1. Most of them were classified as δ Sct-type pulsations originating from the primary star. Theoretical frequencies for the seismic analysis were obtained by adding the nonrotating model frequencies from the GYRE and their rotational shifts from the complete calculation approach. Grid-based fitting was conducted for various stellar properties. The theoretical frequencies and stellar parameters of the best solution concurred well with the observations. The rotation rate was constrained to 1.50 ± 0.02 day−1, indicating the synchronized rotation of the primary star. The results imply that the complete approach based on the polytropic model is applicable to the seismic analysis of fast-rotating δ Sct stars.
Studies of Cepheus X-4 during the 2018 Outburst Observed with AstroSat
Authors: Mukerjee Kallol , Antia H. M. 
Published: October 2021

Abstract
We present timing and spectral results for the 2018 outburst of Cepheus X-4, observed twice by AstroSat at luminosities of 2.04 × 1037 erg s−1 and 1.02 × 1037 erg s−1. The light curves showed strong pulsation and co-related X-ray intensity variation in the SXT (0.5–8.0 keV) and LAXPC (3–60 keV) energy bands. The spin period and spin-down rate of the pulsar were determined from two observations to be 65.35080 ± 0.00014 s and (−2.10 ± 0.8) × 10−12 Hz s−1 at epoch MJD 58301.61850, and 65.35290 ± 0.00017 s and (−1.6 ± 0.8) × 10−12 Hz s−1 at epoch MJD 58307.40211. Pulse shape studies with AstroSat showed energy- and intensity-dependent variations. The pulsar showed an overall continuous spin-down over 30 yr at an average rate of (−2.455 ± 0.004) × 10−14 Hz s−1, attributed to the propeller effect in the subsonic regime of the pulsar, in addition to variations during its outburst activities. Spectra between the 0.7 keV and 55 keV energy bands were well fitted by two continuum models, an absorbed compTT model and an absorbed power law with a Fermi–Dirac cutoff (FD-cutoff) model with a blackbody. These were combined with an iron emission line and a cyclotron absorption line. The prominent cyclotron resonance scattering features with a peak absorption energy of

30.48

−
0.34

+
0.33

keV and

30.68

−
0.44

+
0.45

keV for the FD-cutoff model and

30.46

−
0.28

+
0.32

keV and

30.30

−
0.34

+
0.36

keV for the compTT model were detected during two AstroSat observations. When compared with earlier results, these showed long-term stability of an average value of 30.23 ± 0.22 keV with wide variation in source luminosity. The pulsar showed pulse phase as well as luminosity dependent variations in the cyclotron line energy and width and in the plasma optical depth of its spectral continuum.
Say Hello to Algol's New Companion Candidates
Authors: Jetsu Lauri 
Published: October 2021

Abstract
Constant orbital period ephemerides of eclipsing binaries give the computed eclipse epochs (C). These ephemerides based on the old data cannot accurately predict the observed future eclipse epochs (O). Predictability can be improved by removing linear or quadratic trends from the O − C data. Additional companions in an eclipsing binary system cause light-time travel effects that are observed as strictly periodic O − C changes. Recently, Hajdu et al. estimated that the probability of detecting the periods of two new companions from the O − C data is only 0.00005. We apply the new discrete chi-square method to 236 yr of O − C data of the eclipsing binary Algol (β Persei). We detect the tentative signals of at least five companion candidates having periods between 1.863 and 219.0 yr. The weakest one of these five signals does not reveal a “new” companion candidate, because its 680.4 ± 0.4 day signal period differs only 1.4σ from the well-known 679.85 ± 0.04 day orbital period of Algol C. We detect these same signals also from the first 226.2 yr of data, and they give an excellent prediction for the last 9.2 yr of our data. The orbital planes of Algol C and the new companion candidates are probably coplanar because no changes have been observed in Algol’s eclipses. The 2.867 day orbital period has been constant since it was determined by Goodricke.
X-Ray Superflares from Pre-main-sequence Stars: Flare Modeling
Authors: Getman Konstantin V. , Feigelson Eric D. , Garmire Gordon P. 
Published: October 2021

Abstract
Getman et al. report the discovery, energetics, frequencies, and effects on environs of >1000 X-ray superflares with X-ray energies E
X ∼ 1034–1038 erg from pre-main-sequence (PMS) stars identified in the Chandra MYStIX and SFiNCs surveys. Here we perform detailed plasma evolution modeling of 55 bright MYStIX/SFiNCs superflares from these events. They constitute a large sample of the most powerful stellar flares analyzed in a uniform fashion. They are compared with published X-ray superflares from young stars in the Orion Nebula Cluster, older active stars, and the Sun. Several results emerge. First, the properties of PMS X-ray superflares are independent of the presence or absence of protoplanetary disks inferred from infrared photometry, supporting the solar-type model of PMS flaring magnetic loops with both footpoints anchored in the stellar surface. Second, most PMS superflares resemble solar long-duration events that are associated with coronal mass ejections. Slow-rise PMS superflares are an interesting exception. Third, strong correlations of superflare peak emission measure and plasma temperature with the stellar mass are similar to established correlations for the PMS X-ray emission composed of numerous smaller flares. Fourth, a new correlation of loop geometry is linked to stellar mass; more massive stars appear to have thicker flaring loops. Finally, the slope of a long-standing relationship between the X-ray luminosity and magnetic flux of various solar-stellar magnetic elements appears steeper in PMS superflares than for solar events.