bluuebunny/crossref_metadata_2025_split huggingface dataset:
Knowledge Management Framework for Cloud Federation
Authors: Mellaoui Wahiba , Posso Richard , Gebrealif Yodit , Bock Erik , Altmann Jörn , Yoon Hyenyoung 
Published: December 2021

AbstractA cloud federation (CF) is an alliance of cloud service providers (CSPs) working together to overcome scalability and portability barriers. However, there are some business challenges (e.g., lack of trust, lack of schemes for revenue sharing, and lack of schemes for resource sharing) and technological challenges (e.g., missing schemes for resource provisioning, lack of coordinated resource management, and little load balancing), causing instability in CFs. As CF alliances pursue strategic goals, they require intensive knowledge sharing. In fact, practitioners have confirmed a positive impact of knowledge management on stability and success of strategic alliances (SA). According to the literature, SAs may also face learning issues such as non–controlled information revelation or unbalanced dissemination of core competencies. These findings pose challenges about the nature of the knowledge and how to share it within a CF. Nonetheless, there is only scarce literature on KM in CF. Thus, the purpose of the paper is to propose a KM framework for CFs with the aim of strengthening stability and potential CF commercialization.
AI Technologies and Motives for AI Adoption by Countries and Firms: A Systematic Literature Review
Authors: Kabalisa Rene , Altmann Jörn 
Published: December 2021

AbstractIn this era of digital revolution, artificial intelligence stands to be one of the emerging technologies to revolutionize the way we live, work, or communicate. While everyone is fighting to lead in this technology, their readiness differs and adoption challenges arise in many sectors. These competitions also result in various economic impacts on countries, firms, and individuals. This paper uses a systematic literature review to analyze the existing economic impact of AI adoption and the technology used. Overall, this paper presents clear evidence that AI adoption has a large effect on an economy. Findings of this research help researchers and practitioners to identify important economic impacts of adopting AI, identify directions for future research, and set policies that need to be put in place.
R-parity violation axiogenesis
Authors: Co Raymond T. , Harigaya Keisuke , Johnson Zachary , Pierce Aaron 
Published: December 2021

Abstract
We show that the rotation of the QCD axion field, aided by B−L violation from supersymmetric R-parity violating couplings, can yield the observed baryon abundance. Strong sphaleron processes transfer the angular momentum of the axion field into a quark chiral asymmetry, which R-parity violating couplings convert to the baryon asymmetry of the Universe. We focus on the case of dimensionless R-parity violating couplings with textures motivated by grand unified theories and comment on more general scenarios. The axion decay constant and mass spectrum of supersymmetric particles are constrained by Big Bang nucleosynthesis, proton decay from the R-parity violation, and successful thermalization of the Peccei-Quinn symmetry breaking field. Axion dark matter may be produced by the axion rotation via the kinetic misalignment mechanism for axion decay constants below 1010 GeV, or by the conventional misalignment mechanism for 1011-12 GeV. The viable parameter region can be probed by proton decay and axion searches. This scenario may also have connections with collider experiments, including searches for long-lived particles, and observations of gravitational waves.
Positivity and geometric function theory constraints on pion scattering
Authors: Zahed Ahmadullah 
Published: December 2021

Abstract
This paper presents the fascinating correspondence between the geometric function theory and the scattering amplitudes with O(N) global symmetry. A crucial ingredient to show such correspondence is a fully crossing symmetric dispersion relation in the z-variable, rather than the fixed channel dispersion relation. We have written down fully crossing symmetric dispersion relation for O(N) model in z-variable for three independent combinations of isospin amplitudes. We have presented three independent sum rules or locality constraints for the O(N) model arising from the fully crossing symmetric dispersion relations. We have derived three sets of positivity conditions. We have obtained two-sided bounds on Taylor coefficients of physical Pion amplitudes around the crossing symmetric point (for example, π+π−→ π0π0) applying the positivity conditions and the Bieberbach-Rogosinski inequalities from geometric function theory.
Axion fragmentation on the lattice
Authors: Morgante Enrico , Ratzinger Wolfram , Sato Ryosuke , Stefanek Ben A. 
Published: December 2021

Abstract
We analyze the phenomenon of axion fragmentation when an axion field rolls over many oscillations of a periodic potential. This is particularly relevant for the case of relaxion, in which fragmentation provides the necessary energy dissipation to stop the field evolution. We compare the results of a linear analysis with the ones obtained from a classical lattice simulation, finding an agreement in the stopping time of the zero mode between the two within an $$ \mathcal{O}(1) $$
O

1

difference. We finally speculate on the generation of bubbles with different VEVs of the axion field, and discuss their cosmological consequences.
Null Kähler Geometry and Isomonodromic Deformations
Authors: Dunajski Maciej 
Published: December 2021

AbstractWe construct the normal forms of null-Kähler metrics: pseudo-Riemannian metrics admitting a compatible parallel nilpotent endomorphism of the tangent bundle. Such metrics are examples of non-Riemannian holonomy reduction, and (in the complexified setting) appear on the space of Bridgeland stability conditions on a Calabi–Yau threefold. Using twistor methods we show that, in dimension four—where there is a connection with dispersionless integrability—the cohomogeneity-one anti-self-dual null-Kähler metrics are generically characterised by solutions to Painlevé I or Painlevé II ODEs.
Mathematical indices for the influence of risk factors on the lethality of a disease
Authors: Martínez Ricardo , Sánchez-Soriano Joaquín 
Published: December 2021

AbstractWe develop a theoretical model to measure the relative relevance of different pathologies of the lethality of a disease in society. This approach allows a ranking of diseases to be determined, which can assist in establishing priorities for vaccination campaigns or prevention strategies. Among all possible measurements, we identify three families of rules that satisfy a combination of relevant properties:neutrality,irrelevance, and one of threecompositionconcepts. One of these families includes, for instance, the Shapley value of the associated cooperative game. The other two families also include simple and intuitive indices. As an illustration, we measure the relative relevance of several pathologies in lethality due to COVID-19.
Enabling the sustainable space era by developing the infrastructure for a space economy
Authors: Anglada-Escudé Guillem 
Published: December 2021

AbstractThe world is changing fast, and so is the space sector. Planning for large scientific experiments two decades ahead may no longer be the most sensible approach. I develop the argument that large science experiments are becoming comparable to terrestrial civil infrastructures in terms of cost. As a result, these should incorporate plans for a return on investment (or impact, not necessarily economic), require a different approach for inter-division coordination within the European Space Agency (ESA), and a broader participation of all society stakeholders (civil society representatives, and the broader public). Defining which experiments will be relevant two decades ahead adds rigidity and quenches creativity to the development of cutting edge science and technology. This is likely to discourage both senior and earlier career professionals into supporting such long-term (and often precarious) plans. A more sensible strategy would be increasing the rate of smaller well understood experiments, engage more society sectors in the development of a truly space-bound infrastructure, and formulate a strategy more in tune with the challenges faced by our society and planet. We argue that such strategy would lead to equally large -even larger- scale experiments in the same time-scale, while providing economic returns and a common sense of purpose. A basic but aggressive road map is outlined.
Could the DSM-5 Cultural Formulation Interview Hold Therapeutic Potential? Suggestions for Further Exploration and Adaptation Within a Framework of Therapeutic Assessment
Authors: Strand Mattias , Bäärnhielm Sofie 
Published: December 2021

AbstractThe Cultural Formulation Interview (CFI), included in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders, is a person-centered instrument for systematically appraising the impact of cultural factors in psychiatric assessment. A number of key areas in the future development of the CFI have been identified in order to ensure further clinical uptake. In this paper, we suggest that applying a Therapeutic Assessment (TA) approach in using the CFI—i.e., framing the interview in a way that gives primacy to its self-transformative potential by explicitly focusing on those issues that are seen as the most urgent, relevant, and meaningful by the patient—could prove helpful in alleviating patients’ suffering beyond what is achieved by merely collecting relevant cultural information that may inform diagnosis and subsequent treatment interventions. The TA methodology has been designed as a collaborative approach to psychological assessment in which the assessment procedure itself is meant to induce therapeutic change. This is achieved by explicitly focusing on the particular questions and queries that patients have about themselves with respect to their mental health problems or psychosocial well-being; these questions are then allowed to guide the assessment process and the interpretation of the findings. We suggest a number of potential modifications to the related Outline for Cultural Formulation and to the CFI content that could strengthen a TA-inspired focus. With this paper, we do not claim to offer a definitive integration of the TA approach in using the CFI but hope to further the discussion of a therapeutic potential of the instrument.
Determination of the mud weight window, optimum drilling trajectory, and wellbore stability using geomechanical parameters in one of the Iranian hydrocarbon reservoirs
Authors: Hoseinpour Masoud , Riahi Mohammad Ali 
Published: December 2021

AbstractThe challenges behind this research were encountered while drilling into the Ilam, Mauddud, Gurpi, and Mishrif Formations, where severe drilling instability-related issues were observed across the weaker formations above the reservoir intervals. In this paper, geomechanical parameters were carried out to determine optimum mud weight windows and safe drilling deviation trajectories using the geomechanical parameters. We propose a workflow to determine the equivalent mud window (EMW) that resulted in 11.18–12.61 ppg which is suitable for Gurpi formation and 9.36–13.13 ppg for Ilam and Mishrif Formations, respectively. To estimate safe drilling trajectories, the Poisson’s ratio, Young’s modulus, and unconfined compressive strength (UCS) parameters were determined. These parameters illustrate an optimum drilling trajectory angle of 45° (Azimuth 277°) for the Ilam to Mauddud Formations and less than 35° for the Gurpi Formation. Our analysis reveals that maximum horizontal stress and Poisson’s ratio have the most impact on determining the optimum drilling mud weight windows and safe drilling deviation trajectories. On the contrary, vertical stress and Young’s modulus have minimum impact on drilling mud weight windows and safe drilling deviation trajectories. This study can be used as a reference for the optimal mud weight window to overcome drilling instability issues in future wellbore planning in the study.
A Brief Review on Aerodynamic Performance of Wingtip Slots and Research Prospect
Authors: Liu Dan , Song Bifeng , Yang Wenqing , Yang Xiaojun , Xue Dong , Lang Xinyu 
Published: December 2021

AbstractWingtip slots, where the outer primary feathers of birds split and spread vertically, are regarded as an evolved favorable feature that could effectively improve their aerodynamic performance. They have inspired many to perform experiments and simulations as well as to relate their results to aircraft design. This paper aims to provide guidance for the research on the aerodynamic mechanism of wingtip slots. Following a review of previous wingtip slot research, four imperfections are put forward: vacancies in research content, inconsistencies in research conclusions, limitations of early research methods, and shortage of the aerodynamic mechanism analysis. On this basis, further explorations and expansion of the influence factors for steady state are needed; more attention should be poured into the application of flow field integration method to decompose drag, and evaluation of variation in induced drag seems a more rational choice. Geometric and kinematic parameters of wingtip slot structure in the unsteady state, as well as the flexibility of wingtips, should be taken into account. As for the aerodynamic mechanism of wingtip slots, the emphasis can be placed on the study of the formation, development, and evolution of wingtip vortices on slotted wings. Besides, some research strategies and feasibility analyses are proposed for each part of the research.
Premature Ejaculation Among Internet Users Living in the Metropolitan Region of São Paulo, Brazil: A Cross-Sectional Comparison Between the Premature Ejaculation Diagnostic Tool (PEDT) and Patient-Reported Latency Time and Perception
Authors: dos Reis Margareth de Mello Ferreira , Barros Eduardo Augusto Corrêa , Monteiro Leonardo , Pazeto Cristiano Linck , Baccaglini Willy , Glina Sidney 
Published: December 2021

Abstract

Background
Premature ejaculation (PE) prevalence can vary according to different definitions, assessment methods and populational demographics and culture.

Aims
To investigate the differences between men classified as having “probable PE” (PEDT≥11), “possible PE” (PEDT = 9 or 10) or “no PE” (PEDT≤8) according to the Premature Ejaculation Diagnostic Tool (PEDT) criteria in regard to sociodemographic characteristics, and sexual and relational behavior. To assess the agreement of prevalence of PE according to 3 assessment methods: (i) the ejaculation latency time (ELT) according to the participant's memory; (ii) PEDT and (iii) a direct question about the self-perception of ejaculation as being normal, too early (premature) or retarded.

Methods
In this web-based cross-sectional study, men aged ≥ 18 years living in the metropolitan region of São Paulo, Brazil, responded anonymously to an online survey. We used multinomial regression to estimate the association between PE according PEDT criteria and other features and the kappa coefficient to estimate agreement between the assessment methods.

Outcomes
Association between PEDT-PE, sociodemographic characteristics and sexual and relational behaviors; agreement between PEDT, ELT and self-perception of PE.

Results
Obesity, trying to hold back ejaculation, short or nonexistent foreplay and age &lt;30 years were associated with PEDT ≥11. Men who considered that latency was shorter for oral, anal and vaginal sex than for masturbation were more likely to have probable PE according to PEDT. Possible PE (PEDT scores 9/10) was associated with trying to hold back ejaculation and considering time for ejaculation shorter for vaginal sex. There was fair agreement between assessments (kappa 0.39; CI:0.28 –0.42; P &lt; .001).

Conclusion
PE prevalence varies according to instruments and cut-offs used, with fair agreement between them. This finding shows that the methods evaluate different aspects of the EP syndrome and they must be combined to allow the discrimination between the different types of PE and treatments. Clinical approaches should consider the sexual behavior and relationship of the patient and their distress.
Factors at multiple scales influence the composition of terricolous lichen communities in temperate semi-arid sandy grasslands
Authors: Veres Katalin , Csintalan Zsolt , Kovács Bence , Farkas Edit 
Published: December 2021

AbstractInland dune ecosystems are rich in terricolous lichen species. However, these communities are sensitive to human activities, both locally and globally. Since terricolous lichens have a dominant role in semi-arid sandy grasslands, it is important to explore the composition of their communities and the environmental factors affecting them. We studied the structure of the terricolous lichen assemblages of calcareous grassland in an inland duneland ecosystem by comparing the lichen communities of arid and humid dune sides on two sites with different disturbance histories. Microcoenological data were collected according to the Braun-Blanquet method. Environmental variables include the cover of bare soil, moss, litter, herb cover and height of herbs. We investigated the relationship of these variables and the presence and absence data of terricolous lichen species to sites and dune side. We found that the site had a significant effect on species richness that might reflect the different types and severity of previous disturbance events at the studied sites. On a smaller, ‘dune’ scale, in general lower herb cover and height and a higher moss cover were characteristic of arid dune sides. Most of the frequent species were negatively affected by higher moss cover. Some lichen species were more abundant (e.g. Cladonia furcata) or found only (e.g. Xanthoparmelia subdiffluens, Gyalolechia fulgens) on arid dune sides, while others preferred (e.g. C. pyxidata) or occurred only on (e.g. Peltigera species, C. rei) humid sides. It was observed that the impact of the dune side on several variables differed between sites. The diverse microhabitat types, microclimate and landscape structure, results in species-rich and valuable terricolous lichen communities forming in inland dune ecosystems.
Ramalina arsenii, an additional new species in the R. pollinaria group in Western Europe
Authors: Sérusiaux Emmanuël , van den Boom Pieter , Magain Nicolas 
Published: December 2021

AbstractRamalina arsenii sp. nov. belongs to the R. pollinaria group and is easily recognized by its ITS barcode and several micro-morphological characters that are diagnostic in a European context: small size, less than 3 cm long; soralia developing on the underside of lobe apices; absence of excavate depressions on the lower side. Its ecological niche (i.e. rock outcrops and especially underhangs of slightly calcareous rocks, at low and mid altitudes) is also unique. Ramalina arsenii is frequent and locally abundant in France (Alps, Cantal) and Switzerland (western Alps), and is also known from Germany and the Spanish side of the Pyrenees.
Inner-city possibilities: using place and space to facilitate inter-ethnic dating and romance in 1960s–1980s Leicester
Authors: Bishop Sue Zeleny 
Published: December 2021

AbstractApplying a spatial lens to the oral histories of heterosexual women who had intercultural romantic relationships in Leicester from the 1960s to the 1980s provides an alternative perspective on their experiences. This article examines these women's movements into and around the inner city, eliciting discussion about the concept of ‘safe’ places and spaces and the factors that determined the transient nature of these spaces. It illustrates opportunities created for intercultural mixing, away from familial gaze and public hostility. Utilizing such spaces to develop and sustain their relationships reveals a previously unacknowledged female agency that also enabled an ‘everyday multiculturalism’ in the British city.
The Internal Structure of Mercury's Core Inferred From Magnetic Observations
Authors: Wardinski I. , Amit H. , Langlais B. , Thébault E. 
Published: December 2021

AbstractPrevious models of Mercury's core magnetic field based on high altitude data from first MESSENGER flybys revealed an axisymmetric structure of the field. Here, we use low altitude MESSENGER data covering the entire mission period to construct spherical harmonic models based on various spatial norms. Although we find a dominantly axisymmetric field, our models nevertheless include detectable deviations from axisymmetry. These non‐axisymmetric features appear at high latitudes, resembling intense geomagnetic flux patches at Earth's core‐mantle boundary. Based on this core field morphology, we then attempt to infer Mercury's internal structure. More specifically, assuming that Mercury's high‐latitude non‐axisymmetric features are concentrated by downwellings at the edge of the planet's inner core tangent cylinder, and accounting for the presence of a stably stratified layer at the top of Mercury's core, we establish a relation between the inner core size and the thickness of the stratified layer. Considering plausible ranges, we propose that Mercury's inner core size is about 500–660 km, which corresponds to a stratified layer thickness of 880–500 km, respectively.
Sustainable Use of Groundwater May Dramatically Reduce Irrigated Production of Maize, Soybean, and Wheat
Authors: Lopez Jose R. , Winter Jonathan M. , Elliott Joshua , Ruane Alex C. , Porter Cheryl , Hoogenboom Gerrit , Anderson Martha , Hain Christopher 
Published: December 2021

AbstractGroundwater extraction in the United States (US) is unsustainable, making it essential to understand the impacts of limited water use on irrigated agriculture. To improve this understanding, we integrated a gridded crop model with satellite observations, recharge estimates, and water survey data to assess the effects of sustainable groundwater withdrawals on US irrigated agricultural production. The gridded crop model agrees with satellite‐based estimates of evapotranspiration (R2 = 0.68), as well as survey data from the United States Department of Agriculture (R2 = 0.82–0.94 for county‐level production and 0.37–0.54 for county‐level yield). Using the optimistic assumption that groundwater extraction equals effective aquifer recharge rate, we find that sustainable groundwater use decreases US irrigated production of maize, soybean, and winter wheat by 20%, 6%, and 25%, respectively. Using a more conservative assumption of groundwater availability, US irrigated production of maize, soybean, and winter wheat decreases by 45%, 37%, and 36%, respectively. The wide range of simulated losses is driven by considerable uncertainty in surface water and groundwater interactions, as well as accounting for the many aspects of sustainability. Our results demonstrate the vulnerability of US irrigated agriculture to unsustainable groundwater pumping, highlighting the difficulty of expanding or even maintaining irrigated food production in the face of climate change, population growth, and shifting dietary demands. These findings are based on reducing pumping by fallowing irrigated farmland; however, alternate pumping reduction strategies or technological advances in crop genetics and irrigation could produce different results.