bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prompt photon production in proton–nucleus collisions at LHC: a comparison among color dipole models*
Authors: Wang Hong-Min , Wang Yan-Zhao , Xu Yong-Han , Sun Xian-Jing 
Published: October 2023

Abstract
The nuclear modification factor for prompt photon production in proton–nucleus collisions is investigated within color dipole formalism. By means of the Glauber–Gribov approach, the nuclear effects are studied in various rapidity bins with the evolution equation-based saturation models and the phenomenological dipole models. The theoretical results are compared with the experimental data provided by PHENIX, ATLAS and CMS Collaborations. At forward rapidity and midrapidity, a reasonable agreement with the experimental data is shown for the theoretical results with the modified Kharzeev, Levin and Nardi model, and the Kowalski and Teaney model. Then, we analyze the influence of the initial state energy loss effect on the nuclear modification factor and find that it is obvious only at backward rapidity together with small p
T. Finally, the theoretical results are also compared with those of JETPHOX Monte Carlo program and the predictive results for the LHCb at very forward rapidities are presented.
Density Functional Theory Calculations on the Interstellar Formation of Biomolecules
Authors: Liao Qingli , Wang Junzhi , Xie Peng , Liang Enwei , Wang Zhao 
Published: October 2023

Abstract
Density functional theory (DFT) is the most versatile electronic structure method used in quantum chemical calculations, and is increasingly applied in astrochemical research. This mini-review provides an overview of the applications of DFT calculations in understanding the chemistry that occurs in star-forming regions. We survey investigations into the formation of biologically relevant compounds such as nucleobases in the interstellar medium, and also cover the formation of both achiral and chiral amino acids, as well as biologically relevant molecules such as sugars, and nitrogen-containing polycyclic aromatic hydrocarbons. Additionally, DFT calculations are used to estimate the potential barriers for chemical reactions in astronomical environments. We conclude by noting several areas that require more research, such as the formation pathways of chiral amino acids, complex sugars, and other biologically important molecules, and the role of environmental factors in the formation of interstellar biomolecules.
A New Method for Monitoring Scattered Stray Light of an Inner-occulted Coronagraph
Authors: Liu Da-Yang , Zhang Hong-Xin , Sun Ming-Zhe , Huang Zheng-Hua , Xia Li-Dong , Liu Wei-Xin , Fu Hui 
Published: October 2023

Abstract
The scattered stray light of a coronagraph is a type of stray light that is generated by the objective lens as its surface defects are irradiated by sunlight. The defects mainly include dust and blemishes on the lens surface, microroughness of the lens surface, and impurity and inhomogeneity of the glass. Unlike the other types of relatively stable defects introduced when the objective lens is being manufactured, the scattered stray light caused by dusts on the lens surface is difficult to quantify accurately due to the disorder and randomness of the dust accumulation. The contribution of this type of stray light to the overall stray light level is difficult to determine through simulations and experiments. This can result in continuous deterioration of the stray light level of a coronagraph and thus affect the observation capabilities of the instrument. To solve this issue, through analyzing the forming mechanism of scattered stray light and ghost image generated by the inner-occulted coronagraph, we propose a novel method to monitor the scattered stray light from dusts by utilizing different stray light correlation coefficients. In this method, we first simulate and measure the level of stray light from the ghost image of the objective lens, and then determine the flux ratio of scattered light and ghost image on the conjugate plane. Although the flux ratio varies with the accumulation of dusts on the lens surface, it remains constant on the image plane. Therefore, the level of dust scattering light on the image plane can be obtained by using this ratio together with the level of ghost image stray light. The accuracy of this method has been validated in a laboratory by applying the objective lens with numerous surface cleanliness levels.
Stationarity of quantum statistical ensembles at first-order phase transition points
Authors: Yoneta Yasushi 
Published: October 2023

Abstract
We study the dynamics of quantum statistical ensembles at first-order phase transition points of finite macroscopic systems. First, we show that at the first-order phase transition point of the system, with an order parameter that does not commute with the Hamiltonian, any quantum state with an order parameter that has a nonzero value always evolves towards a macroscopically distinct state after a sufficiently long time. From this result, we argue that the stationarity required for statistical ensembles should be interpreted as stationarity on a sufficiently long but finite timescale. Finally, we prove that the density matrix of the squeezed ensemble, a class of generalized statistical ensembles proposed as the only concrete method of constructing phase coexistence states applicable to general quantum systems, is locally stationary on timescales diverging in the thermodynamic limit. Our results support the validity of the squeezed ensemble from a dynamical point of view and open the door to nonequilibrium statistical physics at the first-order phase transition point.
Generative diffusion in very large dimensions
Authors: Biroli Giulio , Mézard Marc 
Published: October 2023

Abstract
Generative models based on diffusion have become the state of the art in the last few years, notably for image generation. Here, we analyze them in the high-dimensional limit, where data are formed by a very large number of variables. We use methods from statistical physics and focus on two well-controlled high-dimensional cases: a Gaussian model and the Curie–Weiss model of ferromagnetism. In the latter case, we highlight the mechanism of symmetry breaking in the inverse diffusion, and point out that, in order to reconstruct the relative asymmetry of the two low-temperature states, and thus to obtain the correct probability weights, one needs a database with a number of points much larger than the dimension of each data point. We characterize the scaling laws in the number of data and in the number of dimensions for an efficient generation.
Is the Moyal equation for the Wigner function a quantum analogue of the Liouville equation?
Authors: Perepelkin E E , Sadovnikov B I , Inozemtseva N G , Burlakov E V , Afonin P V 
Published: October 2023

Abstract
The Moyal equation describes the evolution of the Wigner function of a quantum system in the phase space. The right-hand side of the equation contains an infinite series with coefficients proportional to powers of the Planck constant. There is an interpretation of the Moyal equation as a quantum analogue of the classical Liouville equation. Indeed, if one uses the notion of the classical passage to the limit as the Planck constant tends to zero, then formally the right-hand side of the Moyal equation tends to zero. As a result, the Moyal equation becomes the classical Liouville equation for the distribution function. In this paper, we show that the right side of the Moyal equation does not explicitly depend on the Planck constant, and all terms of the series can make a significant contribution. The transition between the classical and quantum descriptions is related not to the Planck constant, but to the spatial scale. For a model quantum system with a potential in the form of a «quadratic funnel», an exact 3D solution of the Schrödinger equation is found and the corresponding Wigner function is constructed in the paper. Using trajectory analysis in the phase space, based on the representation of the right-hand side of the Moyal equation, it is shown that on the spatial microscale there is an infinite number of «trajectories» of the particle motion (thereby the concept of a trajectory is indefinite), and when passing to the macroscale, all «trajectories» concentrate around the classical trajectory.
Measuring baryon radiative decays in timelike region with HADES
Authors: Salabura Piotr ,   the HADES collaboration
Published: October 2023

Abstract
Radiative transition of excited baryon to a nucleon with emission of a virtual massive photon decaying to dielectron pair (Dalitz decay) provides important information about baryon-photon coupling at low q
2 in timelike region. First measurements of such decays in proton-proton and quasi-free neutron-proton collisions have been conducted with the HADES detector at GSI/FAIR. The results for the Δ(1232) and higher mass resonances are presented. The extension of this program to pion induced reactions is outlined and illustrated with performance reached in the first pilot experiment.
A study on energy window-based scatter correction methods in 99mTc and 123I imaging
Authors: Can M. , Karadeniz Ö. , Çapa Kaya G. , Ertay T. 
Published: October 2023

Abstract
Tc-99m and I-123 are radionuclides commonly used for
diagnostic examination in nuclear medicine. Detection of the
scattered photons by the Compton interactions in the photopeak
energy window is a factor affecting the image quality. DEW and TEW
scatter correction methods are used to improve the image quality
degrade by Compton scattered photons. In the study, planar and SPECT
images of sphere, rod and cardiac phantom containing different
activities were acquired with a gamma camera system. DEW/TEW
corrected and uncorrected images for Tc-99m/I-123 were evaluated
qualitatively and quantitatively. Both for planar and SPECT images,
the DEW and TEW scatter correction methods were found to improve the
image quality at varying rates.
Picosecond and high-power UV/Vis light pulsing using gallium nitride field-effect transistors: implementation and design evaluation
Authors: Henningsen F. , Braam N. , Danninger M. 
Published: October 2023

Abstract
This paper discusses the development of cost-effective and high-performance picosecond and high-power light pulsers. The use of innovative gallium nitride field-effect transistor technology, in combination with meticulous electronic design and careful selection of light-emitting diodes or laser diodes for ultraviolet and visible spectral ranges, has resulted in superior characteristics compared to commonly used designs. The sub-ns design achieves pulse widths as low as 300 ps, with photon outputs ranging between 104-109 photons per pulse, over a wavelength range of 235-470 nm. Meanwhile, the high-power design achieves pulse widths as low as 1.8 ns, with photon outputs ranging between 107-1011 photons per pulse, and a wavelength
range of 375-525 nm. The two designs complement each other in photon outputs, covering a dynamic range of almost ten orders of magnitude. This paper provides an evaluation of the electrical design and emitter selection of both pulsers, as well as their electrical and optical performance.
Multi-decadal degradation and fragmentation of palsas and peat plateaus in coastal Labrador, northeastern Canada
Authors: Wang Yifeng , Way Robert G , Beer Jordan 
Published: October 2023

Abstract
Peatland permafrost landforms, such as palsas and peat plateaus, often represent the most southern lowland permafrost occurrences in the Northern Hemisphere. While peatland permafrost is often found in continental conditions, over a thousand permafrost peatlands were recently identified along the previously understudied coastline of the Labrador Sea in northeastern Canada. The vulnerability of these landscapes to thaw is unknown but is expected to have hydrological and ecological impacts on important caribou habitat, the abundance of culturally relevant berries, and permafrost carbon storage. Using a combination of aerial photography (from 1948, 1985, 1992, 1994, and 2021) and high-resolution satellite imagery (from 2017, 2020, and 2021), we assess multi-decadal areal changes to peatland permafrost landforms at seven peatlands along the Labrador Sea coastline spanning from Red Bay (51.7° N) to north of Hopedale (55.7° N). Analyses reveal declines in permafrost extent of 33%–93% at individual sites, occurring at mean rates of 0.8%–1.5%/a. Permafrost loss was found to occur most rapidly at mixed palsa and peat plateau sites (mean rate of 1.4%/a), followed by palsa sites (mean rate of 1.2%/a) and peat plateau sites (mean rate of 0.9%/a). Patterns of permafrost loss also differed between landform types, with more complete loss of individual landforms at palsa sites and more lateral and internal loss of existing landforms at peat plateau and mixed sites. This widespread degradation of peatland permafrost over the past 28–73 years is attributed to regional warming and peatland greening. Understanding recent change to permafrost peatlands in coastal Labrador is an important step towards predicting future habitat change in northeastern Canada and will inform regional land management in areas dominated by these culturally important landforms.
Characteristics and mechanisms of the severe compound cold-wet event in southern China during February 2022
Authors: Li Huixin , Sun Bo , Wang Huijun , Zhou Botao , Ma Xingxing 
Published: October 2023

Abstract
A severe compound cold-wet event occurred in southern China (hereafter referred to as
CWESC
) in February 2022, leading to enormous socioeconomic losses. In this study, we proposed a new index to denote the severity of the compound cold-wet event. Based on the multivariate survival method, the
CWESC
in February 2022 is identified as the severest event during the past six decades. Our results indicate that the
CWESC
in 2022 is jointly regulated by the La Niña-like SST condition in the tropical Pacific and the warm SST anomalies in the North Atlantic, and a teleconnection in the Northern Hemisphere during winter (hereafter referred to as TNHW) plays the key role. The TNHW pattern originates from the tropical Pacific, and it splits into two routes over the North Atlantic. The northern branch of TNHW propagates via the Arctic and Siberia, causing intensified near-surface northerly wind and partially inducing an anomalous anticyclone over the western North Pacific (WNP). The southern branch of TNHW propagates via the Mediterranean and western Asia, inducing a deepened India–Burma trough and partially inducing the anomalous anticyclone over WNP. The intensified near-surface northerly wind causes enhanced cold advection over southern China, while the deepened India–Burma trough and the anomalous anticyclone over WNP cause increased southerly warm and moist air flow towards southern China, resulting in the
CWESC
in 2022. Moreover, four groups of numerical experiments forced by tropical Pacific, North Pacific, and North Atlantic SST anomalies are conducted based on the Community Atmosphere Model version 5. The results confirm the important roles of the La Niña-like condition and the warm SST anomalies in the North Atlantic in causing the
CWESC
in 2022.
Sea surface salinity extremes over the global ocean
Authors: Liu Hao , Xu Tengfei , Li Delei , Nie Xunwei , Wei Zexun 
Published: October 2023

Abstract
Sea surface salinity (SSS) extremes, characterized as events surpassing a certain threshold percentile, pose a threat to stenohaline organisms worldwide. This study presents the first global mapping of SSS extreme metrics and investigates their underlying drivers using daily reanalysis data. Our key findings have revealed that mesoscale eddies drive SSS extremes over most of the global ocean with peaks in duration ranging from 5 to 10 d and peaks in intensity ranging from 0.2 to 0.3 g kg−1. Freshwater fluxes (FWFs) and mean currents are generally associated with the occurrence of prolonged and intense SSS extremes in tropical and extratropical oceans, respectively. FWFs related to interannual climate modes contribute to the asymmetric distribution of high and low SSS extremes in the central Pacific Ocean and the western Indian Ocean. These results highlight the distinct impacts of different local drivers on the mean states of SSS extremes.
Disciplinary and institutional diversity of federally funded academic research on climate solutions in the United States
Authors: Burrage April , Goldstein Anna , Carter Tim 
Published: October 2023

Abstract
To meet the demands of technological change required for climate change mitigation, academic research must cover a broad range of climate solutions. Diverse participation in this research is important because research shows that a variety of backgrounds and problem-solving approaches are important to solving complex problems such as climate change. In our study, we examine the discplinary and institutional diversity of federal funding for academic research on climate solutions (ARCS) in the United States. We identify $1.42 billion in federal funding for ARCS in fiscal years 2019 and 2020. Our findings reveal that 85% of federal ARCS grants are awarded to Principal Investigators in engineering and the natural sciences. Additionally, institutions classified as having high research activity (R1s) receive over 60% of the ARCS funding per student. Tribal institutions, Historically Black Colleges and Universities, and Hispanic Serving Institutions collectively receive only $109.20 in ARCS funding per student, compared to $334.30 per student for other institution types. These disparities in federally funded ARCS grants are, in part, a consequence of the absence of policies that promote interdisciplinary collaboration and broader participation in academic research. We discuss the policy implications that have contributed to the identified inequities in ARCS funding and current policies that could enhance the distribution of ARCS in the future. We propose strategies for federally funded ARCS to support an equitable energy transition that addresses the needs of contemporary society and beyond.
A field theory approach to the statistical kinematic dynamo
Authors: Holdenried-Chernoff Daria , King David A , Buffett Bruce A 
Published: October 2023

Abstract
Variations in the geomagnetic field occur on a vast range of time scales, from milliseconds to millions of years. The advent of satellite measurements has allowed for detailed studies of short timescale geomagnetic field behaviour, but understanding its long timescale evolution remains challenging due to the sparsity of the paleomagnetic record. This paper introduces a field theory framework for studying magnetic field generation as a result of stochastic fluid motions. Starting from a stochastic kinematic dynamo model (the Kazantsev kinematic model), we derive statistical properties of the magnetic field that may be compared to observations from the paleomagnetic record. The fluid velocity is taken to be a Kraichnan field with general covariance, which acts as a random forcing obeying Gaussian statistics. Using the Martin-Siggia-Rose-Janssen-de Dominicis formalism, we compute the average magnetic field response function for fluid velocities with short correlation time. From this we obtain an estimate for the turbulent contribution to the magnetic diffusivity, and find that it is consistent with results from mean-field dynamo theory. This framework presents much promise for studying the geomagnetic field in a stochastic context.
Trade-off relations of geometric coherence
Authors: Hu Bingyu , Zhao Ming-Jing 
Published: October 2023

Abstract
Quantum coherence is an important quantum resource and it is intimately related to various research fields. The geometric coherence is a coherence measure both operationally and geometrically. We study the trade-off relation of geometric coherence in qubit systems. We first derive an upper bound for the geometric coherence by the purity of quantum states. Based on this, a complementarity relation between the quantum coherence and the mixedness is established. We then derive the quantum uncertainty relations of the geometric coherence on two and three general measurement bases in terms of the incompatibility respectively, which turn out to be state-independent for pure states. These trade-off relations provide the limit to the amount of quantum coherence. As a byproduct, the complementarity relation between the minimum error probability for discriminating a pure-states ensemble and the mixedness of quantum states is established.
The role of the Callan–Witten anomaly density as a Chern–Simons term in Skyrme model*
Authors: Navarro-Lérida Francisco , Radu Eugen , Tchrakian D H 
Published: October 2023

AbstractWe consider axially symmetric solutions of theU(1) gauged Skyrme model supplemented with a Callan–Witten (CW) anomaly density term. The main properties of the solutions are studied, several specific features introduced by the presence of the CW term being identified. We find that the solitons possess a nonzero angular momentum proportional to the electric charge, which in addition to the usual Coulomb part, acquires an extra (topological) contribution from the CW term. Specifically, it is shown that the slope of mass/energyMvs.electric chargeQeand angular momentumJcan be both positiveandnegative. Furthermore, it is shown that the gauged Skyrmion persists even when the quartic (Skyrme) kinetic term disappears.
Prevented harm and cost avoidance with pharmacist intervention while utilizing a discharge medication reconciliation tool
Authors: Hoffman Abigail M , Walls Jennifer L , Prusch Amanda , Roberts Justin 
Published: October 2023

Abstract

Purpose
The aim of this study was to determine prevented harm and cost avoidance following pharmacist intervention utilizing a discharge medication reconciliation tool.

Methods
A retrospective chart review was conducted to identify patients with pharmacist-initiated, provider-accepted discharge medication reconciliation interventions completed at a community teaching hospital in January 2021. Investigators assigned the discrepancies targeted for intervention a National Coordinating Council for Medication Error Reporting and Prevention (NCC MERP) category, probability of harm, and calculated cost avoidance. The primary endpoint was the total cost avoidance associated with discharge medication reconciliation.

Results
Pharmacists intervened 190 times in January 2021, avoiding an estimated $46,958 to $231,032 in cost. High-risk medications were associated with $33,920 to $147,203 in cost avoidance. The 3 high-risk therapeutic classes associated with the highest cost avoidance were insulin ($16,738-$70,793), antithrombotics ($13,884-$60,016), and opioids ($2,638-$11,834).

Conclusion
Targeted pharmacist discharge medication reconciliation and related interventions avoid significant cost and patient harm.