bluuebunny/crossref_metadata_2025 huggingface dataset:
Fully Consolidated Deposits From Oxide Dispersion Strengthened and Silicon Steel Powders Via Friction Surfacing
Authors: Deshpande Aishwarya , Baumann Christian , Faue Patrick , Mayer Michael , Ressel Gerald , Bleicher Friedrich , Pfefferkorn Frank E.
Published: July 2024

The objective of this work is to study the ability of friction surfacing to deposit metal alloys that are difficult to process with traditional methods. Creep and neutron irradiation-resistant oxide dispersion strengthened (ODS) materials cannot be produced via the conventional casting route due to the insolubility of the oxidic and metallic alloy constituents, causing unintended inhomogeneous oxide dispersion and material behavior. Increasing the silicon content of iron–silicon (Fe–Si) improves electromagnetic properties but embrittles the material significantly, and fusion-based manufacturing methods are unable to process this steel. The solid-state nature of the friction surfacing process offers a potential alternative processing route to enable wider usage of difficult-to-process alloy systems. Both ODS and Fe–Si materials are available in powder forms. While the existing literature in friction surfacing focuses on depositing composites by incorporating small quantities of powders through holes in consumable rods, this is the first study showing that a large charge of powder can be converted to a homogeneous fully consolidated deposit in friction surfacing. A novel methodology is used that incorporates the high portion of powder feedstock into hollow consumable friction surfacing rods (up to 35% volume fraction). It was found that fully consolidated deposits can be produced with powder feedstocks using the proposed methodology. A recrystallized, homogeneous, equiaxed microstructure was observed in Fe–Si 6.8 wt% and a new-generation FeAlOY ODS alloy deposits processed with hollow stainless steel friction surfacing rods. Both powder and rod material plasticize and deposit without bulk intermixing.
Tensionar «lo común» en etnografías colaborativas situadas
Authors: Katzer Leticia , Climent Andrea , Almaraz César , Manzanelli Macarena , Milana Paula
Published: July 2024

El artículo pone en conversación un conjunto de experiencias etnográficas entendidas como «formas-de-vivir-en-común», las cuales presentan una serie de desafíos para el abordaje interdisciplinar. Partimos de la hipótesis central de que la misma etnografía constituye una forma de devenir-en-común que articula y tensiona formas de comunalización diferenciadas. Nuestro objetivo es comparar y analizar procesos y proyectos comunitarios concretados en distintos contextos regionales de Argentina junto a comunidades huarpe de Lavalle (Mendoza) y El Encón (San Juan), kolla (Valles interandinos de Salta), diaguita (valle de Choromoro, Tucumán) y comunidad de Mutquín (Catamarca), en articulación con el análisis de la propia práctica etnográfica colaborativa. Para el análisis retomamos aportes de referentes del posestructuralismo francés y del denominado «pensamiento de la comunidad», en su línea francesa e italiana, en articulación con enfoques contemporáneos de la teoría antropológica y etnográfica, que nos permiten repensar la práctica etnográfica y proyectar nuevos comunes.
Review of actinide core-level photoemission
Authors: Thompson Alaina , Limestall William , Nelson Art , Olive Daniel T. , Terry Jeff
Published: July 2024

Photoelectron spectroscopy allows for the investigation of the electronic structure and chemical bonding of actinide elements and their compounds, providing insights into oxidation states, chemical environments, and electronic configurations. This knowledge can aid in comprehending reactivity, stability, and other properties of actinide materials, which is essential for ensuring safe handling, storage, and disposal in nuclear applications. We have reviewed a number of results in actinide core-level photoemission studies, with a particular focus on x-ray photoemission spectroscopy (XPS) techniques. Actinides, due to their inherent radioactivity, have not been as well studied with XPS as have other segments of the periodic table. Given the inherent safety concerns, equipment requirements, and short isotopic lifetimes associated with actinide research, we outline the strategies and precautions necessary for conducting successful and safe XPS experiments on these elements. Core-level photoemission can be a powerful proven tool for investigating the electronic structure, chemical bonding behaviors, and physical properties of actinides, providing valuable insights into an incredibly complex behavior of these systems. We highlight key findings from recent studies that demonstrate the potential of core-level photoemission in uncovering the unique properties of actinides and their compounds. Finally, we identify current knowledge gaps and future research directions that could enhance our understanding of actinide chemistry and physics.
Splitting the second: Designing a physics course with an emphasis on timescales of ultrafast phenomena
Authors: Ivanov Igor P.
Published: July 2024

Timescales spanning 24 orders of magnitude smaller than one second can be studied experimentally, and each range is packed with different physical phenomena. This rich range of timescales offers a great context for an innovative undergraduate physics course which introduces modern physics and technology from an unconventional perspective. Based on the author's experience in lecturing on these topics to different audiences, this paper proposes a syllabus of a semester-long timescale-based undergraduate physics course.
Transition from bouncing to rolling on a horizontal surface
Authors: Cross Rod
Published: July 2024

If a ball is incident obliquely on a horizontal surface and is allowed to bounce more than once, then it is likely to bounce many times before it starts rolling along the surface. The number of bounces before rolling commences depends on the initial vertical speed and the normal coefficient of restitution. The transition from bouncing to rolling is examined using a simple theoretical model and is compared with experimental data obtained by filming the process with a video camera. We find that the final rolling speed is proportional to the initial horizontal speed of the ball and depends on the initial ball spin, but is independent of the tangential coefficient of restitution. Representative videos for different balls are included as supplementary material, including a superball thrown with a backspin that creates a back and forth motion. Instructors could use the experiment and/or analysis for an advanced undergraduate lab or use a simplified observational exercise for non-majors.
Rutherford scattering of quantum and classical fields
Authors: Pijnenburg Martin , Cusin Giulia , Pitrou Cyril , Uzan Jean-Philippe
Published: July 2024

Quantum Rutherford scattering and the scattering of classical waves by black holes have similar formal structures and can be studied using the same mathematical techniques. In both contexts, the long-range nature of the interaction leads to a divergent total cross section, which has been interpreted and regularized in various ways in the past literature. We review in detail the origin of this divergence, in both real and multipole spaces, and show that it arises from the incorrect use of approximations outside their domain of validity. We also stress that although black hole and quantum Rutherford scattering share the same formalism, the natures of the associated physical observables differ. We comment on the role of interference: while interference may be safely neglected in the context of quantum Rutherford scattering (due to the fact that the observable quantity is a flux, and the incoming flux is collimated), it should not be neglected in the context of classical waves scattered by a black hole, where one expects to see a superposition of transmitted and scattered waves in a broad region downstream from the target and a cross section is not connected to any physically observable quantity.
Hemodynamic Effects of Intermittent Pneumatic Compression on Athletes: A Double-Blinded Randomized Crossover Study
Authors: Maia Filipe , Machado Marta V.B. , Silva Gustavo , Nakamura Fábio Yuzo , Ribeiro João
Published: July 2024

Purpose: There are multiple postexercise recovery technologies available in the market based on the assumption of blood-flow enhancement. Lower-limb intermittent pneumatic compression (IPC) has been widely used, but the available scientific evidence supporting its effectiveness remains scarce, requiring a deeper investigation into its underlying mechanisms. The aim of this study was to assess the hemodynamic effects caused by the use of IPC at rest. Methods: Twenty-two soccer and track and field athletes underwent two 15-minute IPC protocols (moderate- [80 mm Hg] and high-pressure [200 mm Hg]) in a randomized order. Systolic peak velocity, end-diastolic peak velocity, arterial diameter, and heart rate were measured before, during (at the eighth minute), and 2 minutes after each IPC protocol. Results: Significant effects were observed between before and during (eighth minute) the IPC protocol for measures of systolic (P < .001) and end-diastolic peak velocities (P < .001), with the greater effects observed during the high-pressure protocol. Moreover, 2 minutes after each IPC protocol, hemodynamic variables returned to values close to baseline. Arterial diameter presented significant differences between pressures during the IPC protocols (P < .05), while heart rate remained unaltered. Conclusion: IPC effectively enhances transitory blood flow of athletes, particularly when applying high-pressure protocols.
Dosed Failure Increases Older Adult’s Motivation for an Exergame
Authors: Kluft Nick , Smeets Jeroen B.J. , van der Kooij Katinka
Published: July 2024

We investigated whether dosed failure motivates older adults to perform more repetitions in an exergame that involves hitting targets with stepping movements. The effect of dosed failure was studied in a within-participants design in which all participants performed this exergame in both a Standard condition, in which one never fails, and in a Dosed Failure condition, in which we introduced about 30% failures. The order of conditions (Standard First or Dosed Failure first) was chosen randomly for each participant. Results showed that participants performed more repetitions in the Dosed Failure condition compared with the Standard condition, while play duration and subjective motivation at the moment of quitting did not differ. This shows that dosed failure motivated older adults to put a greater amount of effort to perform the exercise without affecting play duration or subjective motivation.
Acute Effects of Cadence-Controlled Walking on Cognition and Vascular Function in Physically Inactive Older Adults: A Randomized Crossover Study
Authors: Zheng Peixuan , MacDonald Hayley V. , Richardson Mark T. , Man Kaiwen , McDonough Ian M. , Aguiar Elroy J.
Published: July 2024

Background: Cadence-controlled walking may be a desirable approach for older adults to self-monitor exercise intensity and achieve physical activity guidelines. We examined the acute effects of cadence-controlled walking on cognition and vascular function in physically inactive older adults. Methods: In a randomized crossover design, 26 participants (65% females, 67.8 ± 11.3 years) underwent 30-min acute exercise (walking at 100 steps/min) and control (sitting) conditions. We measured cognition, central blood pressure (BP), and arterial stiffness before, and immediately, after each condition. Results: We observed significant Time × Condition interactions in the Flanker Inhibitory Control and Attention (Flanker) test and Dimensional Change Card Sort (DCCS) test scores, and in central systolic BP, central pulse pressure, and carotid to femoral pulse wave velocity (p < .05). The Flanker and DCCS scores significantly increased after walking (d = 0.4 and 0.5, respectively), but not after sitting. Central systolic BP, central pulse pressure, and carotid to femoral pulse wave velocity significantly increased after sitting but remained unchanged after acute walking (d = 0.4–0.2), with p-values < .05. After walking, significant correlations were observed between DCCS and diastolic BP and central pulse pressure change scores and change scores in central pulse wave velocity, Flanker, and DCCS (rs = −0.45 to −0.52). Conclusion: These findings suggest that a single bout of cadence-controlled walking elicited an immediate improvement in cognition and might have mitigated increases in arterial stiffness and central BP observed in the seated control condition. Further research is needed to examine the association between cognition and vascular function following acute exercise compared to control conditions. Significance: Our findings may have practical implications for developing daily physical activity recommendations for improving the cognitive health for successful aging.
Pickleball Participation and the Health and Well-Being of Adults—A Scoping Review
Authors: Stroesser Kim , Mulcaster Adam , Andrews David M.
Published: July 2024

Background: Pickleball has grown tremendously in recent years, yet little evidence exists regarding pickleball-related injuries. This scoping review extends current work on pickleball participation by identifying positive and negative health effects associated with the sport. We summarize how pickleball impacts the health and well-being of adult participants. Methods: Searches were conducted on MEDLINE, CINAHL, ProQuest Nursing, ERIC, SPORTDiscus, PsycINFO, Scopus, CBCA Complete, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, and ProQuest Dissertations and Theses. Selected studies considered aspects of health and/or well-being of adult pickleball participants. Using the population/concept/context framework, participants were healthy, able-bodied adults 18 years of age or over, who had played pickleball at least once. The positive and negative outcomes of pickleball on participants’ health and well-being (concept) within the context of pickleball participation were examined. Full-text articles written in English since 2013 were included. Extracted data were tabulated, and a descriptive summary with thematic analysis was completed. Results: This scoping review comprised 27 articles that met the inclusion criteria. Pickleball is promising as an exercise intervention for all adults, and there is evidence of positive social and psychological effects, and health and fitness benefits to participating in pickleball by older adults. Conclusions: Although we are still in the early stages of studying pickleball, there have been some documented health benefits of using the sport as a physical exercise intervention for adults. More research is needed on the types, prevalence, and severity of pickleball injuries and the sport’s impact on younger players.
Reliability of Ultrasound Assessment of Hamstring Morphology, Quality, and Stiffness Among Healthy Adults and Athletes: A Systematic Review
Authors: Fidel Maria Belinda Cristina C. , Ramos Charidy S. , Manlapaz Donald G. , Banwell Helen , Gonzalez-Suarez Consuelo B.
Published: July 2024

Context: The incidence and recurrence rate of hamstring strain injuries remain persistently high, with recurrent injuries leading to increased time lost during play and extended recovery periods compared with initial injury. Ultrasound imaging assesses important factors such as hamstring fascicle length (FL), pennation angle (PA), cross-sectional area (CSA), muscle thickness (MT), echo intensity (EI), and shear wave elastography (SWE), all impacting athletic performance. However, its reliability must be established before employing any measurement tool in research or clinical settings. Objectives: To determine the reliability and measurement error of ultrasound for assessing hamstring FL, PA, CSA, MT, EI, and SWE among healthy adults and athletes; to synthesize the information regarding the operationalization of ultrasound. Evidence Acquisition: A systematic literature search was done from January 1990 to February 5, 2023, to identify reliability and validity studies of hamstring ultrasound assessment published in peer-reviewed journals with identifiable methodology of outcome measures. Evidence Synthesis: Intraclass correlation coefficient measurement of 14 included studies reported moderate to excellent intrarater, interrater, and test–retest reliabilities of FL, PA, and MT regardless of the site of muscle testing, probe size, and setting, state of muscle, and use of different techniques in the extrapolation of FL. Good to excellent test–retest reliability rates for all hamstring anatomic CSA along midmuscle and different percentages of thigh length using panoramic imaging. Good intrarater reliability of EI regardless of gender and orientation of the probe but with excellent intrarater reliability in transverse scan using maximum region of interest. Good intrarater, interrater, and interday repeatability on SWE with the muscle in a stretched position. Conclusion: Evidence from studies with a predominantly low risk of bias shows that ultrasound is a reliable tool to measure hamstring FL, PA, CSA, MT, EI, and SWE in healthy adults and athletes under various experimental conditions.
Isokinetic Peak Torque Improvement and Shoulder Muscle Ratios Imbalance Correction After Specific Strength Training on a New Ballistic Throwing Device: A Randomized Controlled Trial
Authors: Agrebi Brahim , Dhahbi Wissem , Abidi Hatem , Kasmi Sofien , Houas Narjes , Chtara Mokhtar , Chamari Karim
Published: July 2024

Context: The aim of this study was to investigate the effects of 8-week ballistic-strength-training program using a validated specific throwing device (ie, Arm/Shoulder Specific Strength Device), on isokinetic shoulders’ rotation muscle-torques and ratios as well as range of motion in team handball players. Design: A repeated-measures experimental design with a randomized controlled trial was used. Methods: Twenty-six high-level competitive male U-19 team handball players were randomly assigned into training (TG, n = 15) and control (n = 11) groups. The TG undertook a twice a week for 8-week periodized throws program with an individually predetermined optimal load. The program incorporated shackled eccentric and concentric exercises using the Arm/Shoulder Specific Strength Device. Peak torques, functional, and conventional ratios for both arms at different angular velocities (60°·s−1, 180°·s−1, and 300°·s−1) were assessed over time and between groups, using an isokinetic dynamometer. Results: A significant improvement for TG (P < .01; d = 1.13 [moderate]; +20.2%) of the concentric peak torques for dominant arm in external rotation was observed at 300°·s−1. Significant (P < .05–.01) increases were also noted for nondominant arm at the 3 studied angular velocities. In addition, 300°·s−1 eccentric peak torques of the dominant arm and nondominant arm have significantly improved for both external and internal rotations (P < .05; d = .99 [moderate] and d = 1.21 [large]; +15.7% and + 17.9%, respectively) with small changes at the other angular assessed velocities. Posttraining, TG’s dominant arm showed significant improvements (P < .05–.01) in functional and conventional ratios at all velocities. Notably, significant differences (P < .05–.01) were observed at 60°·s−1 and across all velocities when comparing the TG with the control group. TG showed significant increase for internal rotation and external rotation shoulder range of motions (P < .05; d = 1.22–1.27 [large]), +5.0% and +7.7%, respectively). Conclusions: The specific 8-week throwing training program on the Arm/Shoulder Specific Strength Device showed significant performance improvements in almost all assessed isokinetic concentric and eccentric peak torques as well as internal and external range of motion increase for both arms while ensuring rotator cuff torque ratios and shoulder mobility in team handball real sport-specific condition.
Metatranscriptomic response of deep ocean microbial populations to infusions of oil and/or synthetic chemical dispersant
Authors: Peña-Montenegro Tito D. , Kleindienst Sara , Allen Andrew E. , Eren A. Murat , McCrow John P. , Arnold Jonathan , Joye Samantha B.
Published: July 2024

Oil spills are a frequent perturbation to the marine environment that has rapid and significant impacts on the local microbiome. Previous studies have shown that exposure to synthetic dispersant alone did not enhance heterotrophic microbial activity or oxidation rates of specific hydrocarbon components but increased the abundance of some taxa (e.g.,
Colwellia
). In contrast, exposure to oil, but not dispersants, increased the abundance of other taxa (e.g.,
Marinobacter
) and stimulated hydrocarbon oxidation rates. Here, we advance these findings by interpreting metatranscriptomic data from this experiment to explore how and why specific components of the microbial community responded to distinct organic carbon exposure regimes. Dispersant alone was selected for a unique community and for dominant organisms that reflected treatment- and time-dependent responses. Dispersant amendment also led to diverging functional profiles among the different treatments. Similarly, oil alone was selected for a community that was distinct from treatments amended with dispersants. The presence of oil and dispersants with added nutrients led to substantial differences in microbial responses, likely suggesting increased fitness driven by the presence of additional inorganic nutrients. The oil-only additions led to a marked increase in the expression of phages, prophages, transposable elements, and plasmids (PPTEPs), suggesting that aspects of microbial community response to oil are driven by the “mobilome,” potentially through viral-associated regulation of metabolic pathways in ciliates and flagellates that would otherwise throttle the microbial community through grazing.

IMPORTANCE

Microcosm experiments simulated the April 2010 Deepwater Horizon oil spill by applying oil and synthetic dispersants (Corexit EC9500A and EC9527A) to deep ocean water samples. The exposure regime revealed severe negative alterations in the treatments’ heterotrophic microbial activity and hydrocarbon oxidation rates. We expanded these findings by exploring metatranscriptomic signatures of the microbial communities during the chemical amendments in the microcosm experiments. Here we report how dominant organisms were uniquely associated with treatment- and time-dependent trajectories during the exposure regimes; nutrient availability was a significant factor in driving changes in metatranscriptomic responses. Remarkable signals associated with PPTEPs showed the potential role of mobilome and viral-associated survival responses. These insights underscore the time-dependent environmental perturbations of fragile marine environments under oil and anthropogenic stress.
Maximum likelihood estimators for colony-forming units
Authors: Martini K. Michael , Boddu Satya Spandana , Nemenman Ilya , Vega Nic M.
Published: July 2024

Measuring the abundance of microbes in a sample is a common procedure with a long history, but best practices are not well-conserved across microbiological ﬁelds. Serial dilution methods are commonly used to dilute bacterial cultures to produce countable numbers of colonies, and from these counts, to infer bacterial concentrations measured in colony-forming units (CFUs). The most common methods to generate data for CFU point estimates involve plating bacteria on (or in) a solid growth medium and counting their resulting colonies or counting the number of tubes at a given dilution that have growth. Traditionally, these types of data have been analyzed separately using different analytic methods. Here, we build a direct correspondence between these approaches, which allows one to extend the use of the most probable number method from the liquid tubes experiments, for which it was developed, to the growth plates by viewing colony-sized patches of a plate as equivalent to individual tubes. We also discuss how to combine measurements taken at different dilutions, and we review several ways of analyzing colony counts, including the Poisson and truncated Poisson methods. We test all point estimate methods computationally using simulated data. For all methods, we discuss their relevant error bounds, assumptions, strengths, and weaknesses. We provide an online calculator for these estimators.

Estimation of the number of microbes in a sample is an important problem with a long history. Yet common practices, such as combining results from different measurements, remain sub-optimal. We provide a comparison of methods for estimating abundance of microbes and detail a mapping between different methods, which allows to extend their range of applicability. This mapping enables higher precision estimates of colony-forming units (CFUs) using the same data already collected for traditional CFU estimation methods. Furthermore, we provide recommendations for how to combine measurements of colony counts taken across dilutions, correcting several misconceptions in the literature.
Childhood neurodivergent traits, inflammation and chronic disabling fatigue in adolescence: a longitudinal case–control study
Authors: Quadt Lisa , Csecs Jenny , Bond Rod , Harrison Neil A , Critchley Hugo D , Davies Kevin A , Eccles Jessica
Published: July 2024

Objectives

To test whether inflammatory processes link the expression of childhood neurodivergent traits to chronic disabling fatigue in adolescence.

Design

Longitudinal case–control study.

Setting

We analysed data from The Avon Longitudinal Study of Parents and Children (ALSPAC).

Participants

8115 and 8036 children of the ALSPAC cohort at ages 7 and 9 years, respectively, 4563 of whom also completed self-report measures at age 18 years.

Primary and secondary outcome measures

We assessed if children scoring above screening threshold for autism/attention deficit hyperactivity disorder (ADHD) at ages 7 and 9 years had increased risk of chronic disabling fatigue at age 18 years, computing ORs and CIs for effects using binary logistic regression. Mediation analyses were conducted to test if an inflammatory marker (interleukin 6 (IL-6)) at age 9 years linked neurodivergent traits to chronic disabling fatigue at age 18 years.

Results

Children with neurodivergent traits at ages 7 and 9 years were two times as likely to experience chronic disabling fatigue at age 18 years (likely ADHD OR=2.18 (95% CI=1.33 to 3.56); p=0.002; likely autism OR=1.78 (95% CI=1.17 to 2.72); p=0.004). Levels of IL-6 at age 9 were associated with chronic disabling fatigue at age 18 (OR=1.54 (95% CI=1.13 to 2.11); p=0.006). Inflammation at age 9 years mediated effects of neurodivergent traits on chronic disabling fatigue (indirect effect via IL-6: ADHD b=1.08 (95% CI=1.01 to 1.15); autism b=1.06; (95% CI=1.03 to 1.10)). All effects remained significant when controlling for the presence of depressive symptoms.

Conclusions

Our results indicate higher risk of chronic disabling fatigue for children with neurodivergent traits, likely linked to higher levels of inflammation. The implementation of transdiagnostic screening criteria to inform support strategies to counteract risk early in life is recommended.
Supportive care interventions in metastatic bone disease: scoping review
Authors: Simister Samuel K , Bhale Rahul , Cizik Amy M , Wise Barton L , Thorpe Steven W , Ferrell Betty , Randall R Lor , Fauer Alex
Published: July 2024

Background

Patients with secondary metastatic involvement of the musculoskeletal system due to primary cancers are a rapidly growing population with significant risks for health-related end-of-life morbidities. In particular, bone metastases or metastatic bone disease (MBD) imparts significant adversity to remaining quality of life. No rigorous review of clinical trials on the use of supportive care interventions for MBD has been conducted. The objective of this review was to examine the characteristics of supportive care interventions for MBD and critically appraise study designs, key findings, and quality of evidence of the research.

Methods

We searched for published clinical trials, systematic reviews and meta-analyses in PubMED, CINAHL and Google Scholar for articles published between September 2017 and September 2022. Some examples of Medical Subject Headings terms were: ‘secondary neoplasm’, ‘metastatic bone disease’, ‘palliative care’ and ‘supportive care intervention’. Quality of published evidence was evaluated based on treatment types and study design.

Results

After reviewing 572 publications, 13 articles were included in the final review and evaluation including seven clinical trials, two trial protocols and four systematic reviews. Feasible interventions included enhanced palliative care consultation, palliative radiotherapy and alternative medicines. Interventions addressed primary endpoints of fatigue (N=4, 31%), pain (N=3, 23%) or cancer-related symptoms (N=3, 23%) with patient-reported outcome instruments. No interventions reported on fracture complications or endpoints, specifically. The quality of most studies was moderate to strong.

Conclusion

Supportive care interventions for MBD are feasible and the impact is measurable via patient-reported outcome measures. While the evidence for interventions was moderate to strong, there are very few specific controlled trials for skeletal-related events and impacts of social determinants of health. Further clinical trials are needed to define supportive care interventions for MBD that demonstrate reduced risk of fracture and that mitigate the reduced quality of life when negative musculoskeletal outcomes arise.
The environmental low-frequency background for macro-calorimeters at the millikelvin scale
Authors: Aragão L. , Armigliato A. , Brancaccio R. , Brofferio C. , Castellaro S. , D’Addabbo A. , De Luca G. , Del Corso F. , Di Sabatino S. , Liu R. , Marini L. , Nutini I. , Quitadamo S. , Ruggieri P. , Vetter K. J. , Zavatarelli M. , Zucchelli S.
Published: July 2024

Many of the most sensitive physics experiments searching for rare events, like neutrinoless double beta ($$0\nu \beta \beta $$

0
ν
β
β

) decay, coherent elastic neutrino nucleus scattering and dark matter interactions, rely on cryogenic macro-calorimeters operating at the mK-scale. Located underground at the Gran Sasso National Laboratory (LNGS), in central Italy, CUORE (Cryogenic Underground Observatory for Rare Events) is one of the leading experiments for the search of $$0\nu \beta \beta $$

0
ν
β
β

decay, implementing the low-temperature calorimetric technology. We present a novel multi-device analysis to correlate environmental phenomena with the low-frequency noise of low-temperature calorimeters. Indeed, the correlation of marine and seismic data with data from a couple of CUORE detectors indicates that cryogenic detectors are sensitive not only to intense vibrations generated by earthquakes, but also to the much fainter vibrations induced by marine microseisms in the Mediterranean Sea due to the motion of sea waves. Proving that cryogenic macro-calorimeters are sensitive to such environmental sources of noise opens the possibility of studying their impact on the detectors physics-case sensitivity. Moreover, this study could pave the road for technology developments dedicated to the mitigation of the noise induced by marine microseisms, from which the entire community of cryogenic calorimeters can benefit.
Role of hidden-color components in the tetraquark mixing model
Authors: Kim Hungchong , Kim K. S.
Published: July 2024

Multiquarks can have two-hadron components and hidden-color components in their wave functions. The presence of two-hadron components in multiquarks introduces a potential source of confusion, particularly with respect to their resemblance to hadronic molecules. On the other hand, hidden-color components are essential for distinguishing between multiquarks and hadronic molecules. In this work, we study the hidden-color components in the wave functions of the tetraquark mixing model, a model that has been proposed as a suitable framework for describing the properties of two nonets in the$$J^{P}=0^{+}$$JP=0+channel: the light nonet [$$a_{0} (980)$$a0(980),$$K_{0}^{*} (700)$$K0∗(700),$$f_{0} (500)$$f0(500),$$f_{0} (980)$$f0(980)] and the heavy nonet [$$a_{0} (1450)$$a0(1450),$$K_{0}^* (1430)$$K0∗(1430),$$f_{0} (1370)$$f0(1370),$$f_{0} (1500)$$f0(1500)]. Our analysis reveals a substantial presence of hidden-color components within the tetraquark wave functions. To elucidate the impact of hidden-color components on physical quantities, we conduct computations of the hyperfine masses,$$\langle V_{CS}\rangle $$⟨VCS⟩, for the two nonets, considering scenarios involving only the two-meson components and those incorporating the hidden-color components. We demonstrate that the hidden-color components constitute an important part of the hyperfine masses, such that the mass difference formula,$$\Delta M\approx \Delta \langle V_{CS}\rangle $$ΔM≈Δ⟨VCS⟩, which has been successful for the two nonets, cannot be achieved without the hidden-color contributions. This can provide another evidence supporting the tetraquark nature of the two nonets.
Stability investigations of de Sitter inflationary solutions in power-law extensions of the Starobinsky model
Authors: Pham Tuyen M. , Nguyen Duy H. , Do Tuan Q. , Kao W. F.
Published: July 2024

In this paper, we would like to examine whether stable de Sitter inflationary solutions appear within power-law extensions of the Starobinsky model. In particular, we will address general constraints for the existence along with the stability of de Sitter inflationary solutions in a general case involving not only the Starobinsky $$R^2$$

R
2

term but also an additional power-law $$R^n$$

R
n

one. According to the obtained results, we will be able to identify which extension is more suitable for an early inflationary phase rather than a late-time cosmic acceleration phase. To be more specific, we will consider several values of n to see whether the corresponding de Sitter inflationary solutions are stable or not.
Probing black holes in a dark matter spike of M87 using quasinormal modes
Authors: Liu Dong , Yang Yi , Long Zheng-Wen
Published: July 2024

Dark matter density can be significantly enhanced by the supermassive black hole at the galactic center, leading to a structure called dark matter spike. Dark matter spike may change the spacetime properties of black holes that constitute deviations from GR black holes. Based on these interesting background, we construct a set of solutions of black holes in a dark matter spike under the Newtonian approximation and full relativity. Combining the mass model of M87, we study the quasinormal modes of black holes in the scalar field and axial gravitational perturbation, then compared them with Schwarzschild black hole. Besides, the impacts of dark matter on the quasinormal mode of black holes have been studied in depth. In particular, in the axial gravitational perturbation, our results show that the impacts of dark matter spike on the quasinormal mode of black holes can reach up to $$10^{-4}$$

10

-
4

. These new features from quasinormal mode of black holes under the Newtonian approximation and full relativity may provide some help for the establishment of the final dark matter model, and provide a new thought for the indirect detection of dark matter.
Photon emissions from Kerr equatorial geodesic orbits
Authors: Su Yanming , Guo Minyong , Yan Haopeng , Chen Bin
Published: July 2024

We consider the light emitters moving freely along the geodesics on the equatorial plane near a Kerr black hole and study the observability of these emitters. To do so, we assume these emitters emit photons isotropically and monochromatically, and we compute the photon escaping probability (PEP) and the maximum observable blueshift (MOB) of the photons that reach infinity. We obtain numerical results of PEP and MOB for the emitters along various geodesic orbits, which exhibit distinct features for the trajectories of different classes. In particular, we find that the plunging emitters could have considerable observability even in the near-horizon region. This interesting observational feature becomes more significant for the high-energy emitters near a high-spin black hole. As the radiatively-inefficient accretion flow may consist of plunging emitters, the present work could be of great relevance to the astrophysical observations.
Modeling of biogas production from hydrothermal carbonization products in a continuous anaerobic digester
Authors: Dekhici Benaissa , Benyahia Boumediene , Cherki Brahim , Fiori Luca , Andreottola Gianni
Published: July 2024

The coupling between anaerobic digestion and hydrothermal carbonization (HTC) is a promising alternative for sustainable energy production. This study presents a dynamic model tailored for a lab-scale anaerobic digester operating on HTC products, specifically hydrochar and HTC liquor derived from sewage and agro-industrial digestate. Leveraging a modified version of the Anaerobic Model 2 (AM2), our simplified model of four states integrates pH and biomass decay rates into biomass kinetics. Simulation results of the mode were compared with experimental data collected over 164 days from the digester. The obtained results have proven the ability of the proposed model to predict the trend of the biogas production as well as important measured outputs of the bioreactor. The developed model could be used to control and optimize the performance of the digester, which provides potential for bioenergy production from waste streams such as digestate and digestate treated through the HTC process.
Language and Education: Ideologies of Correctness
Authors: Rymes Betsy , Lee Eunsun , Negus Sydney
Published: July 2024

This review illustrates how language ideologies about correctness, in speaking and writing, have been discussed in research on the role of language in education. Research illustrates a give-and-take between the interests of multilingual speakers and advocates of language diversity on the one hand and, on the other, the correctness ideologies embedded in institutional demands for correctness and standardization (in schools and language policies) and commodification (in the global educational marketplace). More subtle than ideologies of correctness, language ideologies about “appropriate” language emerge as related to race, ethnicity, gender, and other embodied biases, and the nuanced mechanisms of language socialization illuminate the persistent dynamics of these appropriateness ideologies. Finally, we discuss the relevance of postcolonial epistemologies, the collaborative participatory research methods that are reframing what counts as correct and appropriate for the study of language and education, and the emerging role of generative artificial intelligence for language in education.
Autobiography: A 50-Year Quest for Understanding in Geoscience
Authors: Molnar Peter
Published: July 2024

Readers will be led down a random path from continental dynamics to paleoclimate. A key to understanding continental dynamics is recognizing that differences in gravitational potential energy per unit area between high and low terrain govern much of large-scale continental deformation. Removal of mantle lithosphere, not just crustal thickening, plays a crucial, but difficult-to-test, role in changes in surface elevation. Although measuring past surface heights remains a challenge, indications of such processes suggest that surface uplift associated with such removal can affect relative plate motion. Climate change, from a warmer to cooler climate, and associated changes in erosion and sedimentation introduce further complications to determining past elevations. The phenomena that led to such cooling include a number of possibilities, but I favor the emergence of islands in the Maritime continent, which transformed the Pacific Ocean from one with a warm eastern tropical Pacific, as during El Niño events, to the present-day La Niña–like background state. Teleconnections from the eastern tropical Pacific to Canada affect the duration of summers and the potential of high-latitude ice to accumulate.
▪Lateral gradients in gravitational potential energy per unit area (GPE), a force per unit length, govern large-scale continental dynamics.▪Removal of mantle lithosphere and thickening of crust raise GPE; knowledge of mean surface elevations provides a test of these processes.▪Climate change from a warmer to cooler climate and from one with less to more erosion can give the false impression of elevation change.▪Emergence of Indonesian islands, more rain over them, a stronger Walker Circulation, and cooler eastern Pacific may have led to ice ages.
Circular RNA RRM2 alleviates metabolic dysfunction-associated steatotic liver disease by targeting miR-142-5p to increase NRG1 expression
Authors: Wu Long-Fei , Zhou Zhi-Jiang , Zeng Yu-Heng , Yang Sheng-Li , Zhang Qing-Ying
Published: July 2024

CircRRM2 expression was downregulated in free fatty acid (FFA)-challenged hepatocytes and high-fat diet (HFD) fed mice. Overexpressed circular RNA ribonucleotide reductase subunit M2 (circRRM2) attenuated metabolic dysfunction-associated steatotic liver disease (MASLD) development by suppressing FFA-induced triglycerides accumulation. CircRRM2 targeted microRNA-142-5p (miR-142-5p), which served as an upstream inhibitor of neuregulin 1 (NRG1) and collaboratively regulated MASLD progression.
A Lingual Agnostic Information Retrieval System
Authors: Abdullahi Umar Bn , Ekuobase Godspower Osaretin
Published: July 2024

The exclusion of monolingual natives from cyberspace is a global socioeconomic and cultural problem. Efforts at addressing this problem have been socioeconomic, culminating in training, empowerment, and digital access with the indelible hurt of language inequities. This paper is aimed at the cyber‐inclusion of monolingual natives. Since cyber participation is basically through human interaction with cyber‐applications in a human language, encapsulating these applications for interaction in any human language will help evade the hurt of language inequities. Information retrieval system (IRS) remains a fundamental cyber‐application. Consequently, adopting the design science research methodology, we introduced a lingual agnostic IRS architecture designed on the principle of transparency on user language detection, information translations, and caching. The detailed design of the architecture was done using the unified modeling language. The designed IRS architecture has been implemented using the agile and component‐based software engineering approaches. The resultant lingual agnostic IRS (LAIRS) was evaluated using heuristics and system evaluation methods for parity of language of interaction against the default language and was excellently stable across queries and languages, guaranteeing 86% parity with the default language in the use of other languages for information access and retrieval. Furthermore, it has been shown that LAIRS is the most appropriate IRS to address the problem of language barriers to cyber‐inclusion compared with existing IRSs.
Effectiveness of Tailored Multisensory Stimulation Intervention in People with Major Neurocognitive Disorder: A Quasiexperimental Pilot Study
Authors: Garrido-Pedrosa Jèssica , Capdevila Elisabet , Berga-Quintana Núria , González-Román Loreto , Guijosa-Mira Maria Eulalia , Castro Irene Astilleros , Grau-Sánchez Jennifer
Published: July 2024

Purpose. This study is aimed at evaluating the effectiveness of multisensory stimulation intervention (MSS) on mood, behaviour, quality of life, and physiological parameters in people with major neurocognitive disorder who live in a nursing home. Methods. We conducted a pilot study with a quasiexperimental design. A total of 17 individuals diagnosed with moderate to severe major neurocognitive disorder received eight 30‐minute sessions of MSS. Sessions were adapted based on individuals’ cognitive level (GDS 6‐7) and sensory preferences. Outcomes regarding mood, behaviour, and physiological parameters were collected before and after each session. Outcomes related to quality of life and neuropsychiatric symptoms were assessed pre and postintervention. Results. Participants presented significant improvements in mood and behaviour. They were happier, more attentive to their environment, active/alert, and relaxed/content after sessions. In addition, immediately after their sessions, they were less tearful/sad, fearful/anxious, confused, and wandering/aggressive, as well as less bored/inactive. In terms of physiological parameters, a significant increase in the median heart rate of participants was detected after the sessions, but no differences were found in oxygen saturation. Moreover, a substantial improvement in the participants’ quality of life, measured with the quality of life in Alzheimer’s disease (p = .03) and in neuropsychiatric symptoms (neuropsychiatric inventory‐questionnaire, p = .04), was observed postintervention. Conclusion. MSS appears to be effective on mood and behaviour immediately after sessions and also appears to improve quality of life and reduce neuropsychiatric symptoms postintervention, when these are person‐centred through one‐to‐one interventions that have been adapted to the participants’ sensory preferences.
Mutant IDH Modulates Suppressive Myeloid Populations in Malignant Glioma
Authors: Grewal Eric P. , Richardson Leland G.K. , Sun Jing , Ramapriyan Rishab , Martinez-Lage Maria , Miller Julie J. , Carter Bob S. , Cahill Daniel P. , Curry William T. , Choi Bryan D.
Published: July 2024

Purpose:

Mutations in the isocitrate dehydrogenase (IDH) genes IDH1 and IDH2 have critical diagnostic and prognostic significance in diffuse gliomas. Neomorphic mutant IDH activity has been previously implicated in T-cell suppression; however, the effects of IDH mutations on intratumoral myeloid populations remain underexplored. In this study, we investigate the influence of IDH status on the myeloid compartment using human glioma specimens and preclinical models.

Experimental Design:

We performed RNA sequencing and quantitative immunofluorescence on newly diagnosed, treatment-naive IDH-mutant grade 4 astrocytoma and IDH-wild-type (IDH-WT) glioblastoma (GBM) specimens. We also generated a syngeneic murine model, comparing transcriptomic and cell-level changes in paired isogenic glioma lines that differ only in IDH mutational status.

Results:

Among patient samples, IDH-mutant tumors displayed an underrepresentation of suppressive myeloid transcriptional signatures, which was confirmed at the cellular level with decreased numbers of intratumoral M2-like macrophages and myeloid-derived suppressor cells. Introduction of the mutant IDH enzyme into murine glioma was sufficient to recapitulate the transcriptomic and cellular shifts observed in patient samples.

Conclusions:

We provide transcriptomic and cellular evidence that mutant IDH is associated with a quantitative reduction of suppressive myeloid cells in gliomas and that introduction of the mutant enzyme is sufficient to result in corresponding cellular changes using an in vivo preclinical model. These data advance our understanding of high-grade gliomas by identifying key myeloid cell populations that are reprogrammed by mutant IDH and may be targetable through therapeutic approaches.