bluuebunny/crossref_metadata_2025_split huggingface dataset:
Maxwell extension of f(R) gravity
Authors: Cebecioğlu Oktay , Saban Ahmet , Kibaroğlu Salih 
Published: January 2023

AbstractInspired by the Maxwell symmetry generalization of general relativity (Maxwell gravity), we have constructed the Maxwell extension of f(R) gravity. We found that the semi-simple extension of the Poincare symmetry allows us to introduce geometrically a cosmological constant term in four-dimensional f(R) gravity. This symmetry also allows the introduction of a non-vanishing torsion to the Maxwell f(R) theory. It is found that the antisymmetric gauge field $$B^{ab}$$

B

ab

associated with Maxwell extension is considered as a source of the torsion. It is also found that the gravitational equation of motion acquires a new term in the form of an energy–momentum tensor for the background field. The importance of these new equations is briefly discussed.
Evolution of global polarization in relativistic heavy-ion collisions within a perturbative approach
Authors: Li Xiaowen , Jiang Ze-Fang , Cao Shanshan , Deng Jian 
Published: January 2023

AbstractExtremely large angular orbital momentum can be produced in non-central heavy-ion collisions, leading to a strong transverse polarization of partons that scatter through the quark-gluon plasma (QGP) due to spin-orbital coupling. We develop a perturbative approach to describe the formation and spacetime evolution of quark polarization inside the QGP. Polarization from both the initial hard scatterings and interactions with the QGP have been consistently described using the quark-potential scattering approach, which has been coupled to realistic initial condition calculation and the subsequent $$(3+1)$$

(
3
+
1
)

-dimensional viscous hydrodynamic simulation of the QGP for the first time. Within this improved approach, we have found that different spacetime-rapidity-dependent initial energy density distributions generate different time evolution profiles of the longitudinal flow velocity gradient of the QGP, which further lead to an approximately 15% difference in the final polarization of quarks collected on the hadronization hypersurface of the QGP. Therefore, in addition to the collective flow coefficients, the hyperon polarization may serve as a novel tool to help constrain the initial condition of the hot nuclear matter created in high-energy nuclear collisions.
A Dixmier type averaging property of automorphisms on a C∗-algebra
Authors: Rørdam Mikael 
Published: January 2023

In this study of the relative Dixmier property for inclusions of von Neumann algebras and of [Formula: see text]-algebras, Popa considered a certain property of automorphisms on [Formula: see text]-algebras, that we here call the strong averaging property. In this paper, we characterize when an automorphism on a [Formula: see text]-algebra has the strong averaging property. In particular, automorphisms on commutative [Formula: see text]-algebras possess this property precisely when they are free. An automorphism on a unital separable simple [Formula: see text]-algebra with at least one tracial state has the strong averaging property precisely when its extension to the finite part of the bi-dual of the [Formula: see text]-algebra is properly outer, and in the simple, non-tracial case the strong averaging property is equivalent to being outer. To illustrate the usefulness of the strong averaging property we give three examples where we can provide simpler proofs of existing results on crossed product [Formula: see text]-algebras, and we are also able to extend these results in different directions.
Parameterized Complexity of Logic-based Argumentation in Schaefer’s Framework
Authors: Mahmood Yasir , Meier Arne , Schmidt Johannes 
Published: January 2023

Argumentation is a well-established formalism dealing with conflicting information by generating and comparing arguments. It has been playing a major role in AI for decades. In logic-based argumentation, we explore the internal structure of an argument. Informally, a set of formulas is the support for a given claim if it is consistent, subset-minimal, and implies the claim. In such a case, the pair of the support and the claim together is called an argument. In this article, we study the propositional variants of the following three computational tasks studied in argumentation: ARG (exists a support for a given claim with respect to a given set of formulas), ARG-Check (is a given set a support for a given claim), and ARG-Rel (similarly as ARG plus requiring an additionally given formula to be contained in the support). ARG-Check is complete for the complexity class DP, and the other two problems are known to be complete for the second level of the polynomial hierarchy (Creignou et al. 2014 and Parson et al., 2003) and, accordingly, are highly intractable. Analyzing the reason for this intractability, we perform a two-dimensional classification: First, we consider all possible propositional fragments of the problem within Schaefer’s framework (STOC 1978) and then study different parameterizations for each of the fragments. We identify a list of reasonable structural parameters (size of the claim, support, knowledge base) that are connected to the aforementioned decision problems. Eventually, we thoroughly draw a fine border of parameterized intractability for each of the problems showing where the problems are fixed-parameter tractable and when this exactly stops. Surprisingly, several cases are of very high intractability (para-NP and beyond).
Hybrid NarrowBand-internet of things protocol for real time data optimization
Authors: Kurniawan Denny , Ashar Muhammad , Ar Rosyid Harits 
Published: January 2023

The level of dependence on data communication in the modern era is increasing exponentially. The internet of things (IoT) plays a very important role in the advancement of the industrial revolution 4.0 that utilizes data communication systems. IoT deployments require data communication protocols, such as hypertext transfer protocol (HTTP), and message queuing telemetry transport (MQTT) as well as network communication protocols (wireless) to meet the network needs of devices with limited resources. Optimization of data communication in IoT is needed to maintain the quality of sending and receiving data in real time. This research proposes a hybrid NarrowBand-IoT (NB-IoT) protocol designed using NarrowBand communication network technology with optimization of data communication using MQTT and HTTP protocols. In this research, the hybrid NB-IoT protocol has the best packet loss value of 0.010% against the HTTP NB-IoT protocol which has a value of 0.017%, and the MQTT NB-IoT protocol of 0.024%. The hybrid NB-IoT protocol has a latency value of 8.7 seconds compared to the HTTP NB-IoT protocol which has a latency of 10.9 seconds. Meanwhile, the throughput value of the hybrid NB-IoT protocol is 158906.1 byte/s and is better than the MQTT NB-IoT protocol which is only 158898.6 bytes/s.
Measuring Is Making: The Radical Indeterminacy of Music
Authors: Lovett Matthew 
Published: January 2023

AbstractIn Meeting the Universe Halfway, the feminist theorist Karen Barad explores the indeterminate nature of measurement. Drawing on empirical research into quantum entanglement, they develop an axiomatic approach to configuring the fundamental interconnections between processes of measurement and making. This article builds on this aspect of Barad’s work and uses it to consider how an indeterminate measuring-as-making process might manifest in music. By staging an encounter between the composer John Cage’s investigations of indeterminacy and two contemporary pieces of music—Space Golf by Hen Ogledd and Wildfires by SAULT—the author considers how a Baradian theory of measuring-as-making can be used to offer new perspectives on musical creativity.
Characteristics and Formation of Two Leading Marine Heatwave Modes in the North Indian Ocean during Summer and Their Implications for Local Precipitation
Authors: Sandaruwan Jayarathna W. N. D. , Zhou Wen , Cheung Paxson K. Y. , Du Yan , Wang Xuan 
Published: January 2023

Abstract
Marine heatwaves (MHWs) are extreme climatic events that can have a significant impact on marine ecosystems and their services across the world. We examine the spatiotemporal variation of summer MHWs in the north Indian Ocean (NIO) and find that the whole NIO Basin exhibits a pronounced spatial variability as well as a significant increasing trend in MHW frequency. We show that the NIO has two leading MHW modes linked to two distinct sea surface temperature (SST) patterns during summer. The first MHW mode is associated with basinwide warming, which is preconditioned by a decaying El Niño–Southern Oscillation (ENSO) and sustained throughout the summer by anomalous northeasterlies extending from the anticyclonic circulation of the western North Pacific subtropical high (WNPSH). The combined effect of thermocline warming due to downwelling oceanic planetary waves, decreased wind-induced evaporative cooling, and enhanced insolation cause basinwide summer MHWs. The second MHW mode exhibits a zonal dipole pattern, which has unfavorable cooling conditions in the previous seasons. The second MHW mode is associated with a phase change of ENSO and is greatly influenced by the formation of an interhemispheric pressure difference (IHPD) due to strengthening of the Australian high (AH) and weakening of the WNPSH. The IHPD induces cross-equatorial southerly winds across the eastern Indian Ocean. These winds favor the transformation of basinwide cooling conditions into zonal SST patterns via wind–evaporation–SST and thermocline–SST feedback, causing MHWs with a zonal dipole pattern. These MHW modes have a significant influence on the distribution and intensity of summer precipitation in the NIO.
Seasonal Features and Potential Mechanisms of Submesoscale Processes in the Southern Bay of Bengal during 2011/12
Authors: Cheng Xuhua , Li Lanman , Jing Zhiyou , Cao Haijin , Zhou Guidi , Duan Wei , Zhou Yifei 
Published: January 2023

Abstract
This study investigates the seasonal features and generation mechanisms of submesoscale processes (SMPs) in the southern Bay of Bengal (BoB) during 2011/12, based on the output of a high-resolution model, LLC4320 (latitude–longitude–polar cap). The results show that the southern BoB exhibits the most energetic SMPs, with significant seasonal variations. The SMPs are more active during the summer and winter monsoon periods. During the monsoon periods, the sharpening horizontal buoyancy gradients associated with strong straining effects favor the frontogenesis and mixed layer instability (MLI), which are responsible for the SMPs generation. The symmetric instability (SI) scale is about 3–10 km in the southern BoB, which can be partially resolved by LLC4320. The SI is more active during summer and winter, with a proportion of 40%–80% during the study period when the necessary conditions for SI are satisfied. Energetics analysis suggests that the energy source of SMPs is mainly from the local large-scale and mesoscale processes. Baroclinic instability at submesoscales plays a significant role, further confirming the importance of frontogenesis and MLI. Barotropic instability also has considerable contribution to the submesoscale kinetic energy, especially during summer.

Significance Statement
Submesoscale processes (SMPs) are ubiquitous in the Bay of Bengal (BoB). Affected by the seasonally reversing monsoon, abundant rainfall and runoff, and equatorial remote forcing, the upper circulation in the BoB is complex, featuring active mesoscale eddies and rich submesoscale phenomena, making the BoB a “natural test ground” for submesoscale studies. It is found in this work that characteristics of SMPs in the BoB are quite different from other regions. In the southern bay, SMPs are most active during the summer and winter monsoons due to the frontogenesis, enhanced mixed layer instability (MLI), and symmetric instability. These findings could deepen our understanding on multiscale dynamic processes and energy cascade in the BoB and have implications for the study of marine ecology and biogeochemical processes.
Ocean Tides near Hawaii from Satellite Altimeter Data. Part III
Authors: Zhang Yibo , Jiao Shengyi , Wang Yuzhe , Wang Yonggang , Lv Xianqing 
Published: January 2023

Abstract
The Chebyshev polynomial fitting (CPF) method has been proved to be effective to construct reliable cotidal charts for the eight major tidal constituents (M2, S2, K1, O1, N2, K2, P1, and Q1) and six minor tidal constituents (2N2, J1, L2, Mu2, Nu2, and T2) near Hawaii in Part I and Part II, respectively. In this paper, this method is extended to estimate the harmonic constants of four long-period tidal constituents (Mf, Mm, Sa, and Ssa). The harmonic constants obtained by this method were compared with those from the TPXO9, Finite Element Solutions 2014 (FES2014), and Empirical Ocean Tide 20 (EOT20) models, using benchmark data from satellite altimeters and eight tide gauges. The accuracies of the Mf and Mm constituents derived from the CPF method are comparable to those from the models, but the accuracies of the Sa and Ssa constituents are significantly higher than those from the FES2014 and EOT20 models. The results indicate that the CPF method is also effective for estimating harmonic constants of long-period tidal constituents. Furthermore, since the CPF method relies only on satellite altimeter data, it is an easier-to-use method than these ocean tide models.
On Capitalism and Imperialism: A Note Based on Prabhat Patnaik’s Contributions to Economic Theory
Authors: Chandrasekhar C. P. , Ghosh Jayati 
Published: January 2023

From his days as a doctoral student, Prabhat Patnaik was convinced that given the structure and spontaneous logic of capitalism, its expansion and relative ‘stability’ could not be understood without incorporating the role of primitive accumulation and imperialism in its development. That quest made clear that without transcending capitalism and the spontaneity that came from its essential structure, it was impossible to ensure a just, egalitarian and sustainable social order. This article draws on a small corpus of his enormous work to highlight a few insights that emerged from his wide-ranging engagement with that critique and search for an alternative. JEL Codes: B14, B24, B51, E11, N10, N20
Knowledge, Beliefs, and Practices around Newborn Resuscitation in Hilly Tribal Homebirth Settings: A Qualitative Observational Study
Authors: Samakya Srividhya , Pati Sanghamitra , Acharya Subhendu Kumar 
Published: January 2023

Objective The study explores home-based newborn resuscitation methods among the Porja hilly tribe in Andhra Pradesh, India. Methods This study was community-based qualitative observational study conducted between October 2021 and March 2022 at 3 intervals. Among the 28 homebirths, 13 were saved with home-based newborn resuscitation methods. The role of traditional birth attendants to save newborn life were found to be highly appreciable. To document its importance, 28 in-depth interviews (IDIs) and two focus group discussions (FGDs) were employed in the study. The participants were 28 mothers of neonates including 13 mothers whose newborns’ first breaths were initiated with different cultural methods and were purposively selected for the IDIs. The data was cross-checked with five untrained traditional birth attendants and 12 elderly female members involved in home deliveries to manage the newborns’ lives. Data collection was carried out using a semi-structured questionnaire on traditional practices, which measured demographic characteristics and women’s perceptions and practices of home-based newborn resuscitation methods. Results The materials used in neonatal awakening were loud sounds with heavy metals, splattering water, thumb pressures on the forehead, chest, and soles region. Four themes were generated: (a) newborn resuscitation is not required on crying neonates, (b) newborn resuscitation is required on noncrying neonates, (c) knowledge of loss of first breath in newborns, (d) post-resuscitation care methods. Conclusion Culture-specified newborn health practices and traditional beliefs still play a crucial role in shaping newborn care practices among hilly tribal communities. The qualitative studies on tribal newborn resuscitation are most important to preserve beneficial traditional methods and preventing harmful practices can help improve the health status of tribal newborn babies, where there are inadequate neonatal services in poor socio-economical resource settings.
Comparing COVID-19 pandemic health responses in two high-income island nations: Iceland and New Zealand
Authors: Grout Leah , Gottfreðsson Magnús , Kvalsvig Amanda , Baker Michael G. , Wilson Nick , Summers Jennifer 
Published: January 2023

Aims: We aimed to compare COVID-19 control measures, epidemiological characteristics and economic performance measures in two high-income island nations with small populations, favorable border control options, and relatively good outcomes: Iceland and New Zealand (NZ). Methods: We examined peer-reviewed journal articles, official websites, reports, media releases and press articles for data on pandemic preparedness and COVID-19 public health responses from 1 January 2020 to 1 June 2022 in Iceland and NZ. We calculated epidemiological characteristics of the COVID-19 pandemic, as well as measures of economic performance. Results: Both nations had the lowest excess mortality in the OECD from the start of the pandemic up to June 2022. Iceland pursued a mitigation strategy, never used lockdowns or officially closed its border to foreign nationals, and instead relied on extensive testing and contact tracing early in the pandemic. Meanwhile, NZ pursued an elimination strategy, used a strict national lockdown to stop transmission, and closed its international border to everyone except citizens and permanent residents going through quarantine and testing. Iceland experienced a larger decrease in gross domestic product in 2020 (relative to 2019) than NZ (–8·27% vs. –1·22%, respectively). In late 2021, NZ announced a shift to a suppression strategy and in 2022 began to reopen its border in stages, while Iceland ended all public restrictions on 25 February 2022. Conclusions: Many of Iceland’s and NZ’s pandemic control measures appeared successful and features of the responses in both countries could potentially be adopted by other jurisdictions to address future disease outbreaks and pandemic threats.
Investigating municipal and company influences on employment of people with chronic health conditions
Authors: Bolvig Iben , Rangvid Beatrice S. 
Published: January 2023

Aims: In many countries, people with chronic health conditions have a weaker attachment to the labour market and fewer chances of re-employment. Much of the existing literature estimates the importance of institutional factors at the level of the municipality of residence or employer accommodation at the company level individually. This study examined the two levels simultaneously to disentangle the separate effects of municipal-level and of company-level factors. Methods: Using full population data from Denmark, we estimated cross-classified multilevel models for people newly diagnosed with chronic conditions in 2010–2013 (more than 60,000 individuals in 20,000 companies). We tracked their employment outcomes for up to 5 years after diagnosis. Results: The findings suggest that, in the short term, factors at the company level explain differences in the employment levels of individuals with chronic conditions more than institutional factors at the municipal level. A combination of average wage, company-level seniority, company size, and industry seem to explain much of company-level influence. In the longer term, the importance of company-level factors seemed to decline. Company-level factors explained blue collar workers’ employment rates better than those of white collar workers, which is in line with the notion that blue collar workers expend more physical effort in their work so that they may be more reliant on company accommodation than white collar workers in the case of chronic conditions. Conclusions: Company-level factors affected the employment of persons newly diagnosed with chronic health conditions in the short term (in particular among workers in blue collar jobs), while municipal-level factors did not.
Investigation on the indoor environment during a whole cooking process under constant make-up air organization in a Chinese-style residential kitchen
Authors: Liu Yu , Li Chong , Ma Hongqiang , Dong Jiankai 
Published: January 2023

A large amount of heat and particles generated from cooking have a negative impact on occupants’ thermal comfort as well as the indoor environment in the kitchen and adjacent rooms. Although heat generation rate and emission strength of particles are largely affected by oil temperature and cooking duration, there is a lack of quantification on the impact of the indoor environment during the whole cooking process. This study applies a computational fluid dynamics method to simulate air temperature, velocity and particle distribution in a kitchen and indoor environment during a 10-min and after 2-min cooking process with constant make-up air organization from window opening in a Chinese-style residential kitchen. User-defined function was defined for dynamic oil temperature and emission rate based on experimental results from previous studies and was interpreted in FLUENT for transient simulation within 12 min. Results indicate that heat spread remarkably after 30 s of oil heating. Air temperature experienced an increase of about 10.0°C around the occupant during the whole cooking process. For particle distribution, a large variation in the kitchen was observed after 4 min. Particle concentration in an indoor environment was increased dramatically after 6 min. Further studies on the transmission mechanism of heat and particles from the kitchen space to an adjacent room under different cooking scenarios are needed for the design and control of kitchen ventilation.