bluuebunny/crossref_metadata_2025 huggingface dataset:
Creation of a strategic planning system for the socio-economic and innovative development of organizations of higher education
Authors: Evmenov Alexander , Krolivetsky Eduard , Sazneva Lyubov , Sorvina Taisiya
Published: March 2021

The article reveals the theoretical and methodological provisions for the formation of the composition of technological elements of the strategic planning system, their interaction with the resource components of the organization of higher education (on the example of Voronezh and St.Petersburg universities) to achieve generalizing and specific targets of quantitative and qualitative nature of the strategic the goal of long-term development of a higher education institution. The concepts of “strategy”, “strategic vision”, “mission of the organization of higher education” are defined. The possibility of optimizing resource consumption in the process of implementing complex measures within the framework of federal, regional, sectoral and local programs and projects of social, economic and innovative development of higher education organizations is substantiated. The priority directions in the development strategy of the analyzed universities are highlighted. The necessity of including such technological elements as strategic analysis, mission, strategic vision, strategic goal, generalizing (basic) strategy, functional (private) strategies in the system of strategic planning of socio-economic and innovative development of the studied universities is substantiated.
Structural analysis of types of Muslim religious consciousness
Authors: Abdurazakov Axmed , Garnaya Olga , Lebedev Michael , Yunusov Emzari
Published: March 2021

A separate theoretical and legal study should be devoted to essential features of legal consciousness of Muslims, which will be based on the study of perception of positive law through the prism of Islamic religious and legal doctrine. It is advisable to start the basis of this study with definition of its main structural element - the types of Muslim legal consciousness. Consideration of this issue from the standpoint of natural law will expand the traditional boundaries of theory of modern legal consciousness, open up additional applied and scientific horizons and, using the example of Islam, allow us to consider peculiarities of religious influence on legal consciousness of various categories of citizens. Knowledge of foundations of Muslim law, procedure for formation of moral and social religious attitudes, interpretation of religious canons and dogmas contribute to a better understanding of many processes taking place within Russian Muslim community and can form the basis of mechanism for formation of moral legal consciousness, which must be opposed, in its turn, to radical and criminalized forms of religious consciousness.
Social and economic aspects of the formation of environmental consciousness
Authors: Koshetar Uliana , Orochovska Liudmyla , Lytvynska Svitlana , Stetsyk Chrystyna
Published: March 2021

The problem of the interaction of nature and society is ontological in nature, and identifies the direction of the existence of humanity as a single planetary system. The actualization of the concept of “world” relative to the historical process falls at the end of the 19th - beginning of the twentieth century due to the leveling of economic and cultural national characteristics, the formation of a system of labour division at the interstate level, the growth of the role of the media in intercontinental communication. In the twentieth century the existence of capitalist and quasi-socialist social and economic systems affects the development of the world community as a process due to competition and interdependence. This influenced on the directions of the implementation of the scientific and technical revolution, namely on the correlation between material overproduction and the spiritual development of a person and humanity as a whole, which in turn led to a crisis in environmental consciousness. An increase in the sphere of activity and knowledge, the formation of a new system of industrial relations, technological pollution of the environment led towards a global environmental crisis at the beginning of the 21st century. Solving the problem of ecological consciousness at the present stage has become not only the task of describing the vectors of scientific researches in the sector of societynature interaction, but is the main basis for both the development and the existence of civilization as a whole.
Social aspects of resources management through process of understanding the social representations
Authors: Vinogradova Yana , Gurieva Svetlana , Pochebut Ludmila , Chiker Vera
Published: March 2021

The main use of our study is to highlight the concept of resource management through process of deep understanding the social representations in our society in different situation. The study traced the main differences in the concept and social representation of the phenomenon of betrayal in two age samples. Methodology: Projective methods are the main: semi-structured interviews, modification of the Sentence Completion Test. To obtain information on the actual attitude to the phenomenon we conduct the survey. The texts processed content analysis method. Selected differences in social perceptions in the studied groups of different ages reflect the boundaries of the concept. The analysis of structural components shows the dynamics of social representations. Emotional and rational styles of behaviour in a social situation, typical for a middle-age group, have been singled out. Behavioural styles differ in average values of “possibility of betray”. Applications of this study: the results of the research are applicable both in training courses on the psychology of communication and in educational programs on forming a metacognitive assessment of the social situation. The show features of the actual attitude toward to social representations and possibility to analyse the main aspects of resources management.
Professional public accreditation of educational programs in the education quality assessment system
Authors: Demidov Vladimir , Mokhorov Dmitriy , Mokhorova Anna , Semenova Kristina
Published: March 2021

This article aims to examine professional public accreditation of educational programs as a means of ensuring that higher education remains relevant to the current socio-economic public needs in the context of shifting requirements of the labour market, digitalization of most areas of life, and new challenges in technical and technological development. The study actualizes new approaches that can be used in assessing the quality of educational programs implemented in the field of environmental management, energy, and environmental protection. A systems approach views professional public accreditation of educational programs as a set of measures. They aim to ensure the compliance of educational programs with the requirements of professional standards and employers’ expectations. An institutional approach enabled to identify the subjective characteristics of the examined phenomenon. We also used methods of problem analysis, comparative analysis, data collection, and statistical processing. The result of the study is the established need to develop professional public accreditation of educational programs in the system of independent assessment of education quality, which would make it possible to estimate the significant characteristics of an educational program and to determine whether its implementation in a specific timespan is necessary. This study can contribute to the development of the specific practices of professional public accreditation of educational programs, including in the field of rational and sustainable use of natural resources, and it can facilitate the development of the legal, theoretical, and organizational foundations of this type of public activity.
Organizing a portfolio of projects to ensure the required energy efficiency
Authors: Sarkisov David , Esenov Maksim
Published: March 2021

The subject of this paper is the study of the use in practice of the components of the project portfolio in optimal condition. An important issue in the study of this project is the evaluation of the effectiveness of these components. Attention is paid to the portfolio of projects where it is possible to carry out continuous restructuring in accordance with the limited investment opportunities. The authors have developed energy-efficient methods of project management and control at all stages of construction. The role of the utility function in the formation of the investment portfolio is also considered. A model for calculating the indicators of the project portfolio is developed on the example of building a network of banks in Russia. This model allows you to avoid financial losses, evaluate your activities, and improve the efficiency and effectiveness of projects.
Responsibility as a criterion for determining personal maturity
Authors: Burkhonov Abduvali , Avlaev Orif , Abdujalilova Shoira , Otaev Akram
Published: March 2021

This study was intended testing a new psychodiagnostics tool for diagnosis in order to identify the responsibility recognized by highly qualified professionals as one of the key criteria for maturity in work, especially in agriculture sector. The methodology developed in the framework of this research was conventionally called “The main cause of the VAS situation”. The negative correlation between intropunitive attribute and situational responsibility in experiments and the inverse relationship of extrapunitive attribute to the responsibility were also evidence of the responsibility level that can be used to diagnose events, behaviors far from the time they occur. The pertinent results showed that in the impunitive attribute group, non-situational attribution was dominant with 69%, followed by situational attribution with 31%. However, in the extrapunitive attribute group, there was a very different result that was; situational attribution was dominant, accounted for 73%, whereas 27% of examinees had behavior related to situational attribution. The experiments determined the relationship between extrapunitive, impunitive attributes, and situational responsibility.
Identification of crystal plasticity parameters for a non-irradiated and irradiated A508 bainite steel
Authors: Nguyen Can-Ngon , Cailletaud Georges , Barbe Fabrice , Marini Bernard , Nguyen Duy-Duan , Phan Huy-Thien
Published: March 2021

This paper presents the identification of dislocation-density-based crystal plasticity parameters for a A508 Cl3 bainite steel in non-irradiated and irradiated states and at different temperatures. The representative volume element for the identification process is a cube containing 1000 steel grains represented by a Voronoi mosaic discretized by finite elements. The grains are assigned crystallographic orientations corresponding to an isotropic texture. The crystal constitutive model is based on a plastic flow law, a hardening law, and a law of evolution of dislocation densities. Modeling parameters are determined by a two-step calculation with two different crystal structures: (1) using a simple structure with 343 identical grains to identify 7 parameters, (2) using a Voronoi tessellation of 1000 grains to refine the parameters. Thereafter, the calculated stress-strain curves are compared with experimental stress-strain curves. The results show that the simulated stress-strain curves are in good agreement with those of experiments, highlighting the reliability of the proposed procedure to account for the significant effects of irradiation and temperature.
Heterotope Ossifikationen nach Langzeitbeatmung bei COVID-19
Authors: Dahmen Alina , Roukens Robin , Lindenberg Silvia , Peters Klaus M.
Published: March 2021

Während pneumologische, kardiovaskuläre und neurologische Komplikationen einer SARS-CoV-2-Infektion schon gut erforscht sind, ist über Einflüsse auf das muskulo-skelettale System bisher noch relativ wenig bekannt.

Vorgestellt wird ein 65-jähriger Patient, der eine Humeruskopffraktur erlitt, die konservativ behandelt wurde. Sechs Wochen nach dem Unfallereignis traten Husten und Fieber auf, und es wurde COVID-19 diagnostiziert. Es entwickelte sich ein schwerer Verlauf mit ARDS, Lungenarterienembolien, multiplen Hirninfarkten und Hemiparese links, der eine mehrwöchige Beatmung erforderlich machte. In der Folge bildeten sich ausgeprägte Ossifikationen im Bereich der linken Schulter und des linken Ellenbogens aus.

Heterotope Ossifikationen nach Schädel-Hirn-Traumen, nach Verletzungen des Rückenmarks oder längerfristiger Beatmung sind bekannt. Zur Beantwortung der Frage, ob die heterotopen Ossifikationen durch proinflammatorische Prozesse im Rahmen der Immobilisierung und Beatmung oder durch noch unbekannte Pathomechanismen direkt durch SARS-CoV-2 entstanden sind, besteht noch Forschungsbedarf.
Gross Total Resection of a Recurrent in-and-around Cavernous Sinus Meningioma through a Combined Transcavernous Anterior and Middle Infratemporal Fossa Approach with Extracranial-Intracranial Bypass
Authors: Nonaka Yoichi , Hayashi Naokazu , Fukushima Takanori
Published: March 2021

Objectives The study aims to describe surgical management of an invasive cavernous sinus meningioma with a combination of several skull base approaches and bypass surgery.

Design This study is an operative video.

Results Resection of the recurrent skull base meningioma is still challenging, especially if the tumor involves or encases the carotid artery. Cerebral bypass surgery is an essential adjunct in the armamentarium of skull base surgery when vessel reconstruction is required. In this paper, we describe our experience of successful treatment of an invasive recurrent skull base meningioma, which involved the entire cavernous sinus and the internal carotid artery. A 46-year-old woman presented with a 2-year history of gradually worsening left-sided exophthalmos and visual impairment. The patient had previously undergone two craniotomies for resection of the left-sided spheno-orbital meningioma. Pathological diagnosis was chordoid meningioma, which is classified as an intermediate-grade meningioma. The second surgery had been performed for a rapid tumor regrowth 6 months after the first surgery. The patient lost her left-side vision after the second surgery. Aggressive tumor regrowth was confirmed with extension into the left orbit, infratemporal fossa, and cavernous sinus with engulfment of the carotid artery. A balloon occlusion test revealed intolerance of the left internal carotid artery occlusion. Considering the patient's age, tumor behavior, and intolerance of the carotid artery of the lesion side, we scheduled gross total resection of the tumor with vessel reconstruction.

Conclusion Although cerebral bypass surgery is a technically challenging procedure, it plays an important role in the surgical management of the complex vessel-engulfing tumor.

The link to the video can be found at https://youtu.be/GCmpxK3hW18.
Evaluation of Barrett's Esophagus
Authors: Walradt Trent , Bilal Mohammad , Pleskow Douglas K.
Published: March 2021

Barrett's esophagus (BE) is the condition in which a metaplastic columnar epithelium that is predisposed to malignancy replaces the stratified squamous epithelium that normally lines the distal esophagus. BE develops as a consequence of chronic gastroesophageal reflux disease and predisposes to esophageal adenocarcinoma (EAC). Several societal guidelines recommend screening and surveillance for BE to reduce the risk of EAC and its related morbidity and mortality. Even among persons undergoing screening and surveillance, a substantial proportion of cases of EAC can be missed. Consequently, the armamentarium for the evaluation of BE has expanded rapidly over the past decade. In this article, we summarize the pathophysiology and diagnosis of BE. We also discuss the latest advancements in the evaluation of BE.
Robots do not get the coronavirus: The COVID-19 pandemic and the international division of labor
Authors: Brakman Steven , Garretsen Harry , van Witteloostuijn Arjen
Published: March 2021

We assess the expected long-run consequences of the unfolding COVID-19 pandemic and use these as a platform to argue that international business (IB) as a field should expand its research agenda to study the international division of labor. The worldwide response to the COVID-19 pandemic is accelerating the shift toward the de-globalization of capital, but it will also speed up the move to a stronger globalization of labor. This paradoxical, simultaneous occurrence of de-globalization and globalization offers rich opportunities for future IB research.
Coordinating the machine: subnational political context and the effectiveness of machine politics
Authors: Saikkonen Inga A.-L.
Published: March 2021

Political machines use state resources to win elections in many developing democracies and electoral autocracies. Recent research has noted that the coordination of machine politics can be much more complex and problem-prone than previously thought. Yet, the role that the subnational political context plays in solving these coordination problems has largely been neglected in the comparative literature. This article seeks to fill this gap and suggests that control over the local administration is an important variable that shapes the effectiveness of authoritarian machine politics. We exploit the great institutional and political variation within one of the most prominent electoral authoritarian regimes of today, the Russian Federation, to test the empirical implications of the theory with detailed local level electoral and socio-economic data as well as multilevel regression models. The empirical results highlight the importance of subnational political structures in supporting electoral authoritarian regimes.
What can we learn from Covid-19 pandemic’s impact on human behaviour? The case of France’s lockdown
Authors: Atkinson-Clement Cyril , Pigalle Eléonore
Published: March 2021

Year 2020 will mark History, with the emergence of the new Covid-19 virus, and more importantly, the consequent political decisions to apply freedom restriction at such a large-scale. Identifying the human behaviours during this extraordinary period represents a unique opportunity to both improve our fundamental knowledge and to improve future management of similar issues. Throughout almost all the duration of the French lockdown (from March 24, 2020 to May 10, 2020), we carried out an online survey on more than 12,000 individuals well distributed over the country. This online survey was performed by using both LimeSurvey and Google Forms services and was addressed to adults living in France. Statistical analyses combined classical inferential approach, mapping, clustering and text mining. The results showed that a significant part of the population moved out just before the lockdown (around 10% of our sample) and we highlighted three different profiles of participants. The results emphasised that the lockdown measures compliance was lower in two cases: (i) an unfavourable living environment (referring to social and economic inequity) associated with a high feeling of fear and a lack of trust towards Governmental measures; or (ii) the feeling that the risk was low due to the fact that others complied with the measures. In case a similar situation should occur again, it is recommended that Governments broadcast clear speeches to improve trust, limit fear and increase cooperative behaviours.
Demographic determinants of mobile marketing technology adoption by small and medium enterprises (SMEs) in Ekiti State, Nigeria
Authors: Eze Sunday C. , Awa Hart O. , Chinedu-Eze Vera C. A. , Bello Adenike O.
Published: March 2021

A substantial number of factors have been examined on the potentials of SMEs to exploit mobile marketing devices to achieve a competitive edge. However, the limited scholarly investigation has focused on the demographic characteristics of top executives of SMEs and how the location moderates the interaction between the demographic structure of SMEs’ executives and the rate of mobile marketing technology adoption, particularly in the south-west of Nigeria where adoption of these devices are slow. The research examines the effects of demographic factors of top SME executives on mobile marketing technology adoption in Ekiti State Nigeria. Data were collected through questionnaires and responses of 230 SMEs were drawn randomly from a population of 620 registered SMEs operating in 6 different industries located in different towns in Ekiti State, South-West Geo-Political Zone, Nigeria. Hierarchical multiple regression was used to analyse the data. Results revealed that the experience, age, and educational attainment of top SMEs’ executives were statistically significant, and the location of the firm significantly moderated mobile marketing technology adoption. Gender also affected mobile marketing technology adoption among SMEs.
Filgotinib, a novel JAK1-preferential inhibitor for the treatment of rheumatoid arthritis: An overview from clinical trials
Authors: Tanaka Yoshiya , Kavanaugh Arthur , Wicklund Jason , McInnes Iain B
Published: March 2021

In the treatment of rheumatoid arthritis (RA), Janus kinase inhibitors (jakinibs) represent an emerging class of targeted therapies in addition to biologics. The number of jakinibs has been growing and as of 2020, filgotinib was the latest jakinib to enter the international market for treating RA. Filgotinib has demonstrated preferential inhibition of JAK1-dependent cytokine signaling in in vitro assays. It has been evaluated in the DARWIN (phase 2) and FINCH (phase 3) series of clinical studies for treating patients with moderately-to-severely active RA. Filgotinib received regulatory approval in Japan and Europe in September 2020, while in August 2020 the United States Food and Drug Administration requested additional data from two ongoing clinical studies assessing the potential impact of filgotinib on sperm parameters. This article will review the pharmacological properties, efficacy, and safety of filgotinib as demonstrated in clinical studies. Expert opinion will be provided on jakinibs for RA treatment from the viewpoints of basic research and clinical practice.
Stochastic combinations of actin regulatory proteins are sufficient to drive filopodia formation
Authors: Dobramysl Ulrich , Jarsch Iris Katharina , Inoue Yoshiko , Shimo Hanae , Richier Benjamin , Gadsby Jonathan R. , Mason Julia , Szałapak Alicja , Ioannou Pantelis Savvas , Correia Guilherme Pereira , Walrant Astrid , Butler Richard , Hannezo Edouard , Simons Benjamin D. , Gallop Jennifer L.
Published: March 2021

Assemblies of actin and its regulators underlie the dynamic morphology of all eukaryotic cells. To understand how actin regulatory proteins work together to generate actin-rich structures such as filopodia, we analyzed the localization of diverse actin regulators within filopodia in Drosophila embryos and in a complementary in vitro system of filopodia-like structures (FLSs). We found that the composition of the regulatory protein complex where actin is incorporated (the filopodial tip complex) is remarkably heterogeneous both in vivo and in vitro. Our data reveal that different pairs of proteins correlate with each other and with actin bundle length, suggesting the presence of functional subcomplexes. This is consistent with a theoretical framework where three or more redundant subcomplexes join the tip complex stochastically, with any two being sufficient to drive filopodia formation. We provide an explanation for the observed heterogeneity and suggest that a mechanism based on multiple components allows stereotypical filopodial dynamics to arise from diverse upstream signaling pathways.
Estimation of respiratory rate and effort from a chest-worn accelerometer using constrained and recursive principal component analysis
Authors: Schipper Fons , van Sloun Ruud J G , Grassi Angela , Derkx Rene , Overeem Sebastiaan , Fonseca Pedro
Published: March 2021

Objective. Measurement of respiratory rate and effort is useful in various applications, such as the diagnosis of sleep apnea and early detection of patient deterioration in medical conditions, such as infections. A chest-worn accelerometer may be an easy and non-intrusive method, provided it is accurate and robust. We investigate the use of a novel method that can perform under realistic sleeping conditions such as variable sensor positions and body posture. Approach. Twenty subjects (aged 46–65 years) wore an accelerometer on the chest and a respiratory impedance plethysmography band as a reference. The subjects underwent an experimental protocol lasting approximately 90 min, under various postures and with different sensor positions. We used a novel, constrained, and recursive form of principal component analysis (PCA) to estimate the respiratory effort signal robustly. To obtain an estimate for the respiratory rate, first, multiple estimates were aggregated into a single frequency. Subsequently, a quality index was determined, such that unreliable estimates could be identified, and a trade-off could be made between coverage (percentage of time that the quality index is above a threshold) and limits of agreement. Main results. Results were determined over all recorded data, including changes in sensor position and posture. For respiratory effort, it was found that recursive and constrained computation of PCA reduced the estimation error significantly. For respiratory rate, a relation between coverage and limits of agreement was determined. If a minimum coverage of 80% was required, the limits of agreement could be kept below 1.45 breaths per minute. If the limits of agreement were constrained to 0.2 breaths per minute, a mean coverage of 5% was still attainable. Significance. We have shown that chest-worn accelerometery can be a robust and accurate method for measurement of respiratory features under realistic conditions.
Real-time feedback system for divertor heat flux control at COMPASS tokamak
Authors: Khodunov I , Komm M , Havranek A , Adamek J , Bohm P , Cavalier J , Seidl J , Devitre A , Dimitrova M , Elmore S , Faitsch M , Hacek P , Havlicek J , Hron M , Imrisek M , Krbec J , Peterka M , Panek R , Samoylov O , Tomes M , Tomova K , Vondracek P , Weinzettl V
Published: March 2021

The reduction of the incident heat flux onto the divertor will be a necessity for the future thermonuclear reactors. Impurity seeding is recognized as an efficient way to achieve the partial detachment regime, which allows to dissipate a large fraction of power flux by radiation. This paper presents a heat flux real-time feedback system (RTFS) based on impurity seeding controlled by a combined ball-pen and Langmuir probe divertor array in the COMPASS tokamak. A number of features of the system have been studied, such as the type of impurity, seeding location, constants used in the real-time controller and the diagnostic selections. A detailed description of the designed RTFS and the results of the implementation are presented. The findings confirm the applicability of the RTFS for reduction and control of the divertor heat fluxes. Another important implication of this research is the ability of installing such systems in next-step devices.
The minimal seesaw and leptogenesis models
Authors: Xing Zhi-zhong , Zhao Zhen-hua
Published: March 2021

Given its briefness and predictability, the minimal seesaw—a simplified version of the canonical seesaw mechanism with only two right-handed neutrino fields—has been studied in depth and from many perspectives, and now it is being pushed close to a position of directly facing experimental tests. This article is intended to provide an up-to-date review of various phenomenological aspects of the minimal seesaw and its associated leptogenesis mechanism in neutrino physics and cosmology. Our focus is on possible flavor structures of such benchmark seesaw and leptogenesis scenarios and confronting their predictions with current neutrino oscillation data and cosmological observations. In this connection particular attention will be paid to the topics of lepton number violation, lepton flavor violation, discrete flavor symmetries, CP violation and antimatter of the Universe.
Performance analysis of surface plasmon resonance sensors using bimetallic alloy-perovskite-bimetallic alloy and perovskite-bimetallic alloy-perovskite nanostructures
Authors: Dhibi Abdelhak , Hakami Jabir , Abassi Amel
Published: March 2021

In this paper, four SPR sensors have been proposed and analyzed theoretically. The proposed SPR sensors are prism—Au-Ag alloy—CH3NH3PbI3—Au-Ag alloy—graphene—sensing medium, prism—Au-Al alloy—CH3NH3PbI3—Au-Al alloy—graphene—sensing medium, prism—CH3NH3PbI3—Au-Ag alloy—CH3NH3PbI3—graphene—sensing medium and prism—CH3NH3PbI3—Au-Al alloy—CH3NH3PbI3—graphene—sensing medium. Matrix method for N-layer model has been utilized to analysis the performance parameters of the proposed sensors. The performance parameters were determined in terms of the detection accuracy (DA), sensitivity, and figure of Merit (FoM). The thicknesses of bimetallic alloy and CH3NH3PbI3 layers and bimetallic alloy composition have been optimized to achieve the best performance of the sensors. It is found that the best detection accuracy, sensitivity and figure of Merit of the proposed sensors are 0.279 deg−1, 85.2 deg/RIU and 23.79 RIU−1 for configuration I; 0.414 deg−1, 77.2 deg/RIU and 32.03 RIU−1 for configuration II; 0.120 deg−1, 106.60 deg/RIU and 12.81 RIU−1 for configuration III; and 0.186 deg−1, 93 deg/RIU and 17.35 RIU−1 for configuration IV.
Effect of Y-doped NbB2.5 on structural and superconducting properties
Authors: Arévalo-López E P , Rosas-Huerta J L , Huerta L , Marquina M L , Romero M , Escamilla R
Published: March 2021

The crystal structure and magnetic properties of Nb1−xYxB2.5 with 0.000 ≤ x ≤ 0.050 compositions are reported. Rietveld refinement of XRD patterns shows that the partial substitution with yttrium atoms in niobium sites increases the unit cell volume. Magnetization measurements show that the critical temperature (T

c
) changes from 9.0 K to 9.9 K for x = 0.000 and x = 0.050, respectively. Using the XPS measurements, the Nb 3d and B 1s core levels were identified, and the XPS valence band of XPS was measured. Our results show an increase in the valence band at zero eV as the yttrium content increases, which might be related to the T

c
change. The electron-phonon coupling constant was calculated from the McMillan equation; our results indicate that the Nb1−xYxB2.5 compounds are weak-coupled superconductors. Our work stablishes the effect of light doping on the structure and physical properties of these superconductors.
Experimental studies on photoabsorption by endohedral fullerene ions with a focus on Xe@C60
+ confinement resonances
Authors: Müller A , L D Kilcoyne A , Schippers S , A Phaneuf R
Published: March 2021

A brief overview on the status of experimental investigations into photoionization and fragmentation of fullerenes and endohedral fullerenes by absorption of a single short-wavelength photon is presented. The focus of this paper is on the endohedral Xe@C60
+ molecular ion in which a xenon atom is centrally encapsulated inside a

C

60

+

fullerene cage. Confinement resonances that result from the interference of Xe photoelectron matter waves emerging from the

C

60

+

cavity were studied by exposing Xe@C60
+ ions to synchrotron radiation of 60 to 150 eV energy which is the region of the well-known giant atomic Xe

4
d

excitation resonance. Photoions Xe@C
n

q+ (with final charge states

q
=
2
,
3
,
4

of the product ions and numbers

n
=
60
,
58
,
56
,
54

of carbon atoms left in the cage) were recorded as a function of photon energy and cross sections for the individual reaction channels were determined. In addition to previous work, new final channels (

q
=
2
;
n
=
60
,
58

and

q
=
4
;
n
=
58
,
56

) were observed, and thus, about 70% of the oscillator strength expected for the encapsulated Xe atom in the investigated energy range could be recovered. The present results establish the first and, so far, only conclusive experimental observation of confinement resonances in an endohedral fullerene. The data are in remarkable agreement with relativistic R-matrix calculations that accompanied the previous experimental work.
Retrograde polish doughnuts around boson stars
Authors: Teodoro Matheus C. , Collodel Lucas G. , Kunz Jutta
Published: March 2021

We investigate polish doughnuts with a uniform constant specific angular momentum distribution in the space-times of rotating boson stars. In such space-times thick tori can exhibit unique features not present in Kerr space-times. For instance, in the context of retrograde tori, they may possess two centers connected or not by a cusp. Rotating boson stars also feature a static ring, neither present in Kerr space-times. This static ring consists of static orbits, where particles are at rest with respect to a zero angular momentum observer at infinity. Here we show that the presence of a static ring allows for an associated static surface of a retrograde thick torus, where inside the static surface the fluid moves in prograde direction. We classify the retrograde Polish doughnuts and present several specific examples.
Gravitational dark matter production in Palatini preheating
Authors: Karam Alexandros , Raidal Martti , Tomberg Eemeli
Published: March 2021

We study preheating in plateau inflation in the Palatini
formulation of general relativity, in a special case that resembles
Higgs inflation. It was previously shown that the oscillating
inflaton field returns to the plateau repeatedly in this model, and
this leads to tachyonic production of inflaton particles. We show
that a minimally coupled spectator scalar field can be produced even
more efficiently by a similar mechanism. The mechanism is purely
gravitational, and the scalar field mass can be of order
1013 GeV, larger than the Hubble scale by many orders of
magnitude, making this a candidate for superheavy dark matter.
Notch fatigue of Cu50Zr50 metallic glasses under cyclic loading: molecular dynamics simulations
Authors: Yang Yong , Li Hairui , Yang Zailin , Liu Jin , Kabutey Kateye Evans , Zhao Jianwei
Published: March 2021

Molecular dynamics simulation is performed to simulate the tension–compression fatigue of notched metallic glasses (MGs), and the notch effect of MGs is explored. The notches will accelerate the accumulation of shear transition zones, leading to faster shear banding around the notches’ root causing it to undergo severe plastic deformation. Furthermore, a qualitative investigation of the notched MGs demonstrates that fatigue life gradually becomes shorter with the increase in sharpness until it reaches a critical scale. The fatigue performance of blunt notches is stronger than that of sharp notches. Making the notches blunter can improve the fatigue life of MGs.
Realization of adiabatic and diabatic CZ gates in superconducting qubits coupled with a tunable coupler*
Authors: Xu Huikai , Liu Weiyang , Li Zhiyuan , Han Jiaxiu , Zhang Jingning , Linghu Kehuan , Li Yongchao , Chen Mo , Yang Zhen , Wang Junhua , Ma Teng , Xue Guangming , Jin Yirong , Yu Haifeng
Published: March 2021

High fidelity two-qubit gates are fundamental for scaling up the superconducting qubit number. We use two qubits coupled via a frequency-tunable coupler which can adjust the coupling strength, and demonstrate the CZ gate using two different schemes, adiabatic and diabatic methods. The Clifford based randomized benchmarking (RB) method is used to assess and optimize the CZ gate fidelity. The fidelities of adiabatic and diabatic CZ gates are 99.53(8)% and 98.72(2)%, respectively. We also analyze the errors induced by the decoherence. Comparing to 30 ns duration time of adiabatic CZ gate, the duration time of diabatic CZ gate is 19 ns, revealing lower incoherence error rate

r
′

incoherent
,
int

=
0.0197
(
5
)

compared to r
incoherent, int = 0.0223(3).
Corrosion behavior of high-level waste container materials Ti and Ti–Pd alloy under long-term gamma irradiation in Beishan groundwater*
Authors: Wei Qianglin , Li Yuhong , Huang Yanliang , Yang Dongyan , Yang Bo , Liu Yibao
Published: March 2021

Titanium and titanium–palladium alloys are important potential materials for nuclear waste container, which will endure both intense γ-irradiation and groundwater erosion. Therefore, it is very important to investigate the corrosion behavior of the container materials. In this research, the cumulative dose effect of TA8-1 type titanium–palladium alloy (TA8-1) and TA2-type pure titanium (TA2) under γ-irradiation was studied based on the geological disposal of nuclear wastes. The irradiation experiments were performed at room temperature using 60Co gamma sources with a 5.0-kGy⋅h−1 intensity for 40, 80 or 160 days, respectively. The pH value and conductivity of Beishan groundwater were investigated. The results showed that the pH value changed from alkaline (8.22) to acidic (2.46 for TA8-1 and 2.44 for TA2), while the un-irradiated solution remained alkaline (8.17 for TA8-1 and 8.20 for TA2) after 160 days. With the increase of irradiation dose, the conductivity increases rapidly and then tends to become stable, which indicates that the titanium dioxide corrosion layer formed on the surface of the sample surface effectively prevents further corrosion. Meanwhile, XRD and SEM–EDS analysis results show that the main components of corrosion products are TiO2 and TiO. The titanium on the surface of the sample is oxidized, resulting in slight uneven local corrosion. The results show that TA8-1 and TA2 are suitable to be used as candidate materials for high-level waste (HLW) disposal containers due to their excellent performance under long-term and high-dose irradiation corrosion.
Orbital period correction and light curve modeling of the W-subtype shallow contact binary OW Leo
Authors: Zhou Xiao , Qian Sheng-Bang
Published: March 2021

Orbital period and multi-color light curves′ investigation of OW Leo are presented for the first time. The orbital period of OW Leo is corrected from P = 0.325545 days to P = 0.32554052 days in our work, and the observational data from the All-Sky Automated Survey for SuperNovae (ASAS-SN) are used to test the newly determined orbital period. Then, the phased light curves are calculated with the new period and the Wilson-Devinney program is applied to model the light curves, which reveal that OW Leo is a W-subtype shallow contact binary system (q = 3.05, f = 12.8 %). The absolute physical parameters of the two component stars are estimated to be M
1 = 0.31(1)M
⊙, M
2 = 0.95(3)M
⊙, R
1 = 0.63(1)R
⊙, R
2 = 1.04(1)R
⊙, L
1 = 0.43(1)L
⊙ and L
2 = 1.01(2)L
⊙. The evolutionary status shows that the more massive star is less evolved than the less massive star. OW Leo has very low metal abundance, which means its formation and evolution are hardly influenced by any additional component. It is formed from an initially detached binary system through nuclear evolution and angular momentum loss via magnetic braking, and has passed a very long time of main sequence evolution.
Seamless maps of major elements of the Moon: Results from high-resolution geostationary satellite
Authors: Lu Yu , Wu Yun-Zhao , Li Cui , Ma Jin-Song , Qi Wen-Wen , Tan Wei , Li Xiao-Man , Shi Zhi-Cheng , He Hong-Yan , Dai Shu-Wu , Li Guo , Liu Feng-Jing , Wang Jing-Qiao , Wang Xiao-Yan , Wang Qi , Meng Ling-Jie
Published: March 2021

Major elements such as Fe, Ti, Mg, Al, Ca and Si play very important roles in understanding the origin and evolution of the Moon. Previous maps of these major elements derived from orbital data are based on mosaic images or low-resolution gamma-ray data. The hue variations and gaps among orbital boundaries in the mosaic images are not conducive to geological studies. This paper aims to produce seamless and homogenous distribution maps of major elements using the single-exposure image of the whole lunar disk obtained by China’s high-resolution geostationary satellite, Gaofen-4, with a spatial resolution of ∼ 500 m. The elemental contents of soil samples returned by Apollo and Luna missions are regarded as ground truth, and are correlated with the reflectance of the sampling sites extracted from Gaofen-4 data. The final distribution maps of these major oxides are generated with the statistical regression model. With these products, the average contents and proportions of the major elements for maria and highlands were estimated and compared. The results showed that SiO2 and TiO2 have the highest and lowest fractions in mare and highland areas, respectively. Moreover, the relative concentrations of these elements could serve as indicators of geologic processes, e.g., the obviously asymmetric distributions of Al2O3, CaO and SiO2 around Tycho crater may suggest that Tycho crater was formed by an oblique impact from the southwest direction.
The conformity of H i galaxies in ALFALFA-SDSS sample
Authors: Li Lin-Cheng , Qin Bo , Wang Jie , Wang Jing , Wang You-Gang
Published: March 2021

The conformity effect, indicating the evolution of galaxies is related to its surrounding neighbor galaxies as far as a few Mpc, is an interesting phenomenon in the modeling of galaxy and evolution. Here we study the conformity effect of HI galaxies in a matched galaxy sample between SDSS DR7 and ALFALFA surveys. By checking the probability difference for the detected H i galaxies as a function of distance around a normal or an H i galaxy, we find that this effect is significant out to 5 Mpc. It also shows a dependence on the stellar mass of galaxies, with the strength the strongest in the stellar mass range of 1010 < M
*/M⊙ < 1010.5. However, when the sample is confined to central galaxies in groups with virial radii smaller than 1 Mpc, the 1-halo conformity signal is still evident, while the 2-halo conformity signal is reduced to a very weak amplitude. Our results confirm the previous study in the optical band that the 2-halo term is possibly caused by the bias effect in the sample selection. Furthermore, we confirm the existence of the 1-halo conformity discovered in the optical and radio band in previous investigations. Our results provide another viewpoint on the conformity effect and hope to shed light on the co-evolution of the galaxies and their neighbors in the current galaxy formation models.
Numerically investigating the peculiar periphery of a supernova remnant in the medium with a density gradient: the case of RCW 103
Authors: Lu Chun-Yan , Yan Jing-Wen , Wen Lu , Fang Jun
Published: March 2021

The young shell-type supernova remnant RCW 103 has peculiar properties in the X-ray morphology obtained with Chandra. The southeastern shell is brighter in the X-rays, and the curved border of the shell in this region is flatter than the other part.We investigate the formation of the peculiar periphery of the supernova remnant RCW 103 using 3D hydrodynamical simulation. Assuming that the supernova ejecta has been evolved in the medium with a density gradient, the detected shape of the periphery can be generally reproduced. For RCW 103, with the ejecta mass of 3.0 M
⊙, the density of the background material of 2.0 cm−3, and a gradient of 3.3 − 4.0 cm−3 pc−1, the X-ray periphery can be generally reproduced. The simulation turned out that the asymmetry of the SNR RCW 103 is mainly due to the inhomogeneous medium with a density gradient.
Can we constrain the evolution of HI bias using configuration entropy?
Authors: Das Biswajit , Pandey Biswajit
Published: March 2021

We study the evolution of the configuration entropy of HI distribution in the post-reionization era assuming different time evolution of HI bias. We describe time evolution of linear bias of HI distribution using a simple form b(a) = b
0
an
with different index n. The derivative of the configuration entropy rate is known to exhibit a peak at the scale factor corresponding to the Λ-matter equality in the unbiased ΛCDM model. We show that in the ΛCDM model with time-dependent linear bias, the peak shifts to smaller scale factors for negative values of n. This is related to the fact that the growth of structures in the HI density field can significantly slow down even before the onset of Λ domination in the presence of a strong time evolution of the HI bias. We find that the shift is linearly related to the index n. We obtain the best fit relation between these two parameters and propose that identifying the location of this peak from observations would allow us to constrain the time evolution of HI bias within the framework of the ΛCDM model.
Searching for r-process-enhanced stars in the LAMOST survey I: the method
Authors: Chen Tian-Yi , Shi Jian-Rong , Beers Timothy C. , Yan Hong-Liang , Gao Qi , Li Chun-Qian , Li Hai-Ning , Zhao Gang
Published: March 2021

The abundance patterns of r-process-enhanced stars contain key information required to constrain the astrophysical site(s) of r-process nucleosynthesis, and to deepen our understanding of the chemical evolution of our Galaxy. To expand the sample of known r-process-enhanced stars, we have developed a method to search for candidates in the LAMOST medium-resolution (R ∼ 7500) spectroscopic survey by matching the observed spectra to synthetic templates around the Eu ii line at 6645.1 Å. We obtain a sample of 13 metal-poor (−2.35 < [Fe/H] < −0.91) candidates from 12 209 unique stars with 32 774 mediumresolution spectra. These candidates will be further studied by high-resolution follow-up observations in the near future. We describe some extensions of this effort to include larger samples of stars, in particular at lower metallicity, using the strength of the Ba ii line at 6496.9 Å.
The optimization of satellite orbit for Space-VLBI observation
Authors: Liu Lei , Zheng Wei-Min
Published: March 2021

By sending one or more telescopes into space, Space-VLBI (SVLBI) is able to achieve even higher angular resolution and is therefore the trend of the VLBI technique. For the SVLBI program, the design of satellite orbits plays an important role for the success of planned observation. In this paper, we present our orbit optimization scheme, so as to facilitate the design of satellite orbits for SVLBI observation. To achieve that, we characterize the uv coverage with a measure index and minimize it by finding out the corresponding orbit configuration. In this way, the design of satellite orbit is converted to an optimization problem. We can prove that, with an appropriate global minimization method, the best orbit configuration can be found within the reasonable time. Besides that, we demonstrate that this scheme can be used for the scheduling of SVLBI observations.
On the encounter desorption of hydrogen atoms on an ice mantle
Authors: Chang Qiang , Zheng Xu-Li , Zhang Xia , Quan Dong-Hui , Lu Yang , Meng Qing-Kuan , Li Xiao-Hu , Chen Long-Fei
Published: March 2021

At low temperatures (∼10 K), hydrogen atoms can diffuse quickly on grain ice mantles and frequently encounter hydrogen molecules, which cover a notable fraction of grain surface. The desorption energy of H atoms on H2 substrates is much less than that on water ice. The H atom encounter desorption mechanism is adopted to study the enhanced desorption of H atoms on H2 substrates. Using a small reaction network, we show that the steady-state surface H abundances predicted by the rate equation model that includes H atom encounter desorption agree reasonably well with the results from the more rigorous microscopic Monte Carlo method. For a full gas-grain model, H atom encounter desorption can reduce surface H abundances. Therefore, if a model adopts the encounter desorption of H atoms, it becomes more difficult for hydrogenation products such as methanol to form, but it is easier for C, O and N atoms to bond with each other on grain surfaces.