bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving reservoir permeability by electric pulse controllable shock wave
Authors: Zhu Xinguang , Feng Chun , Cheng Pengda 
Published: April 2023

AbstractControllable shock wave (CWS) parameters such as amplitude, operating area and number of operations are easy to control and have received extensive attention as a potential new technology for reservoir permeability enhancement. Based on the continuous-discontinuous element method (CDEM) and considering the coupling mechanism of reservoir deformation, failure, pore seepage and fracture flow, a multiphysical field coupling model of reservoir permeability enhancement under CWS is proposed. Under the fluid–solid coupling condition, the formation and development dynamic process of reservoir fractures are obtained, and the change of reservoir permeability is also obtained. The compression fracture zone, tensile fracture zone and undamaged zone are formed around the wellbore. After repeated impact, the number of fractures is more sensitive to tectonic stress, the fracture aperture is more sensitive to reservoir strength. Different from hydraulic fracturing, a large number of fractures in different directions will appear around the main fracture after repeated impact, forming a complex fracture network similar to spider web, which may be beneficial to improve reservoir permeability. The permeability of reservoirs with different tectonic stresses and strengths increases nonlinearly and monotonicly with repeated impacts. Based on CDEM, the change of reservoir permeability with tectonic stress, strength and impact times is obtained, which is a nonlinear monotonic three-dimensional relationship. Based on that relationship, the parameters of CWS can be controlled to predict the change of reservoir permeability, such as peak pressure, duration, impact times, etc. Therefore, it can optimize the reservoir fracturing scheme and improve the reservoir fracturing efficiency, which has considerable practical significance in engineering.
Rethinking Remote Work, Automated Technologies, Meaningful Work and the Future of Work: Making a Case for Relationality
Authors: Ugar Edmund Terem 
Published: April 2023

AbstractRemote work, understood here as a working environment different from the traditional office working space, is a phenomenon that has existed for many years. In the past, workers voluntarily opted, when they were allowed to, to work remotely rather than commuting to their traditional work environment. However, with the emergence of the global pandemic (corona virus-COVID-19), people were forced to work remotely to mitigate the spread of the virus. Consequently, researchers have identified some benefits and adverse effects of remote work, especially in the age of COVID-19, ranging from flexible time and environment to technostress and isolation. In this paper, using a phenomenological approach, specifically, the sub-Saharan African experiences, I contend that remote work in the age of advanced technologies has obscured the value of relationality due to the problem of isolation in sub-Saharan African workplaces. For sub-Saharan Africans, relationality is a prerequisite moral value to becoming a person. In addition, relationality contributes to meaningfulness in the workspace. Obscuring the value of relationality in the aforementioned locale leads to meaninglessness in the workspace. Furthermore, this paper contributes to the existing literature on meaningful work by critically showing the importance of the value of relationality as a key element that adds meaning to work in sub-Saharan Africa.
Ganzheitliche Klärung des Interventionsbedarfs bei gefährdeter beruflicher Teilhabe an der Schnittstelle von Rehabilitation und Betriebsmedizin
Authors: Fauser David , Boos Nele , Dötsch Saskia , Langer Claudia , Kleineke Vera , Kindel Claudia , Bethge Matthias 
Published: April 2023

Zusammenfassung
Einleitung
Bei Mitarbeiter*innen mit gefährdeter beruflicher Teilhabe ist eine ganzheitliche und arbeitsplatzorientierte Diagnostik erforderlich, um Gesundheitsprobleme zu verstehen und individuelle Lösungsansätze zu finden. Wir entwickelten eine neuartige diagnostische Leistung zur Sicherung beruflicher Teilhabe, die rehabilitative und betriebsärztliche Expertise verbindet. Ziel der Machbarkeitsstudie war die Bewertung der Implementierung sowie die Analyse von Veränderungen von Gesundheit und Arbeitsfähigkeit.

Methoden
Die Beobachtungsstudie (Deutsches Register Klinischer Studien: DRKS00024522) schloss Mitarbeiter*innen mit gesundheitlichen Einschränkungen und eingeschränkter Arbeitsfähigkeit ein. Die Teilnehmenden erhielten ein betriebsärztliches Erstgespräch, eine zweitägige ganzheitliche Diagnostik in einer Rehabilitationseinrichtung und bis zu vier betriebliche Nachsorgegespräche. Fragebogendaten, die im Erstgespräch und im letzten Nachsorgegespräch erhoben wurden, umfassten subjektive Arbeitsfähigkeit (0–10 Punkte) und allgemeine Gesundheit (0–10).

Ergebnisse
Für die Analyse wurden Daten von 27 Teilnehmenden berücksichtigt. Die Teilnehmenden waren zu 63 % weiblich und im Durchschnitt 46 Jahre alt (SD = 11,5). Vom betriebsärztlichen Erstgespräch zum letzten Nachsorgegespräch berichteten die Teilnehmenden eine Verbesserung ihrer allgemeinen Gesundheit (Differenz = 1,52; 95 % KI 0,37–2,67; d = 0,97).

Diskussion und Fazit
Das Modellvorhaben GIBI bietet einen niedrigschwelligen Zugang zu einem vertrauensvollen, ganzheitlichen und arbeitsplatzorientierten Angebot, das die berufliche Teilhabe stärken kann. Eine erfolgreiche Durchführung von GIBI erfordert eine enge und intensive Zusammenarbeit zwischen Betriebsärzt*innen und Rehabilitationseinrichtungen. Zur Bewertung der Wirksamkeit wird aktuell eine randomisierte kontrollierte Studie (n = 210) mit Wartekontrollgruppe durchgeführt.
Addressing Racism in Medical Education: A Longitudinal Antiracism Discussion Curriculum for Medical Students
Authors: Carrera Daniel , Tejeda Christian , Kakani Preeti , Napolitano Jason 
Published: April 2023

AbstractAlthough recent efforts have been engaged to combat bias in medical education, minimal attention has been dedicated to developing antiracism curricula for medical students. We developed a year-long discussion curriculum for 175 first-year medical students centered around Ibram X. Kendi’s How to be an Antiracist. The discussion curriculum consisted of six, 2 hour seminars. We evaluated students’ perceptions regarding discussing and actively addressing racism. Students reported an improved ability and comfort to discuss and address racism within healthcare settings. These data suggest that antiracism discussion curricula may be effective for training medical students to address racism in their future careers.
Modeling ash deposition and shedding during oxy-combustion of coal/rice husk blends at 70% inlet O2
Authors: Krishnamoorthy Gautham 
Published: April 2023

AbstractCo-firing rice husk (RH) and coal with carbon capture using oxy-combustion presents a net carbon negative energy production opportunity. In addition, the high fusion temperature of the non-sticky, silica rich, RH can mitigate ash deposition as well as promote shedding of deposits. To identify the optimum operating conditions, fuel particle sizes, and blend ratios that minimize ash deposition, a Computational Fluid Dynamic methodology with add-on ash deposition and shedding models were employed to predict outer ash deposition and shedding rates during co-combustion of coal/RH in AIR and O2/CO2 (70/30 vol%, OXY70) oxidizer compositions. After ensuring that the fly-ash particle size distributions and particle Stokes numbers near the deposition surface were accurately represented (to model impaction), appropriate models for coal ash and RH ash viscosities that were accurate in the temperature region (1200–1300 K) of interest in this study were identified. A particle viscosity and kinetic energy (PKE) based capture criterion was enforced to model the ash capture. An erosion/shedding criterion that takes the deposit melt fraction and the energy consumed during particle impact into account was also implemented. Deposition rate predictions as well as the deposition rate enhancement (OXY70/AIR) were in good agreement with measured values. While the OXY70 scenario was associated with a significant reduction (60%–70%) in flue gas velocities, it also resulted in larger fly-ash particles. As a result, the PKE distributions of the erosive RH ash were similar in both scenarios and resulted in similar shedding rates.
Die Professionalisierung hochschuldidaktisch Tätiger – eine empirische Untersuchung
Authors: Kraut Matthias , Merkt Marianne , Preiß Jennifer 
Published: April 2023

ZusammenfassungMit der dynamischen Entwicklung des beruflichen Feldes hochschuldidaktisch Tätiger im Kontext von Förderlinien zur Qualitätsentwicklung in Studium und Lehre des Bundesministeriums für Bildung und Forschung (BMBF) stellt sich die Frage nach der Professionalisierung der Hochschuldidaktik. In einer qualitativen Untersuchung wurden Kategorien der Professionalisierung hochschuldidaktisch Tätiger in Anlehnung an die Grounded Theory konzeptualisiert. Sie verweisen darauf, dass die berufliche Identitätsentwicklung hochschuldidaktisch Tätiger sowohl von individuellen Professionalisierungsbestrebungen als auch von den organisationalen Rahmenbedingungen hochschuldidaktischer Tätigkeitsfelder abhängen. Im Artikel werden die Untersuchungsergebnisse vor dem Hintergrund von Erkenntnissen zu individueller Professionalisierung in der Erwachsenenbildung analysiert.
Parameterizing network graph heterogeneity using a modified Weibull distribution
Authors: Ozbay Sinan A. , Nguyen Maximilian M. 
Published: April 2023

AbstractWe present a simple method to quantitatively capture the heterogeneity in the degree distribution of a network graph using a single parameter $$\sigma$$
σ
. Using an exponential transformation of the shape parameter of the Weibull distribution, this control parameter allows the degree distribution to be easily interpolated between highly symmetric and highly heterogeneous distributions on the unit interval. This parameterization of heterogeneity also recovers several other canonical distributions as intermediate special cases, including the Gaussian, Rayleigh, and exponential distributions. We then outline a general graph generation algorithm to produce graphs with a desired amount of heterogeneity. The utility of this formulation of a heterogeneity parameter is demonstrated with examples relating to epidemiological modeling and spectral analysis.
Accessibility strategies to promote inclusive mobility through multi-objective approach
Authors: Silva Tânia , Verde David , Paiva Sara , Barreto Luís , Pereira Ana I. 
Published: April 2023

AbstractIn recent decades, urban mobility has assumed a need for adaptation due to the more significant congestion experienced in cities and the growing focus on sustainability. Several solutions are proposed to help citizens move around in an urban environment. Most are not yet aware of the universal and accessible aspect that these solutions must have. This paper proposes a route support system embedded in a mobile application, Viana+Acessível, using a multi-objective approach. The application aims to promote accessible mobility within the city, contributing to physical and psychological well-being for citizens with reduced mobility, temporary or permanently, such as people with spectrum autism disorder, the visually impaired, wheelchair users, pregnant, and the elderly. For the evaluation of the algorithms, four objective measures were considered: accessibility, slope, time, and length of the paths. The tests carried out with different routing algorithms showed that the A-Star presented the fastest results in terms of execution time compared to the Dijkstra, Floyd–Warshall, and Bellman–Ford. When analysing in a multi-objective approach, time, slope and accessibility were demonstrated to be conflicting objectives. Bi-objective and tri-objective were applied and Pareto front was explored.
Graphical abstract
An experimental study on the abrasive flow machining of aluminum alloy (AA 2024)
Authors: Choopani Yahya , Khajehzadeh Mohsen , Razfar Mohammad Reza 
Published: April 2023

AbstractThe drilling and boring of the aluminum alloys tubes have a significant challenge in surface defects and burr phenomena. There is an ever-increasing demand for the surface modification and deburring of these components in the manufacturing industries. Most of the advanced machining processes have technological restrictions to overcome these challenges. This paper proposes abrasive flow machining (AFM) to meet these requirements. To explore the machining performance, experiments were conducted on the internal surface of tubes made of aluminum alloys (AA2024) in the various number of AFM cycles for studying and observing its behavior on the surface roughness (Ra) and material removal (MR) characteristics with an empirical approach. The empirical findings prove that the AFM process is effective and efficient for machining the internal surface of tubes AA2024 because the Ra value has been remarkably reduced from 1.785 to 0.474 µm and the maximum value of MR has been obtained up to the range of 42 mg. Moreover, surface morphology analysis shows that the boring operation has generated a rough surface full of surface defects. In contrast, the AFM process has produced a smooth surface without surface defects, improving the surface integrity of tubes AA2024.
Heterogeneous tail generalized common factor modeling
Authors: Hediger Simon , Näf Jeffrey , Paolella Marc S. , Polak Paweł 
Published: April 2023

AbstractA multivariate normal mean–variance heterogeneous tails mixture distribution is proposed for the joint distribution of financial factors and asset returns (referred to as Factor-HGH). The proposed latent variable model incorporates a Cholesky decomposition of the dispersion matrix to ensure a rich dependency structure for capturing the stylized facts of the data. It generalizes several existing model structures, with or without financial factors. It is further applicable in large dimensions due to a fast ECME estimation algorithm. The advantages of modelling financial factors and asset returns jointly under non-Gaussian errors are illustrated in an empirical comparison study between the proposed Factor-HGH model and classical financial factor models. While the results for the Fama–French 49 industry portfolios are in line with Gaussian-based models, in the case of highly tail heterogeneous cryptocurrencies, the portfolio based on the Factor-HGH model almost doubles the average return while keeping the volatility, the maximum drawdown, the turnover, and the expected shortfall at a low level.
Triangulations and Error Estimates for Interpolating Lyapunov Functions
Authors: Giesl Peter , Hafstein Sigurdur 
Published: April 2023

AbstractThe CPA method to compute Lyapunov functions depends on a triangulation of the relevant part of the state space. In more detail, a CPA (Continuous and Piecewise Affine) function is affine on each simplex of a given triangulation and is determined by the values at the vertices of the triangulation. Two important aspects in the proof that the CPA method is always able to generate a CPA Lyapunov function if the triangulation is sufficiently fine, are (a) the geometry of the simplices of the triangulation and (b) error estimates of CPA interpolations of functions. In this paper the aspect (a) is tackled by extending the notion of (h, d)-boundedness, which so far has depended on the order of the vertices in each simplex, and it is shown that it is essentially independent of the order and can be expressed in terms of the condition number of the shape matrix. Concerning (b), existing error estimates are generalised to other norms to increase the flexibility of the CPA method. In particular, when the CPA method is used to verify Lyapunov function candidates generated by other methods. Parts of the results were presented in Giesl and Hafstein (Uniformly regular triangulations for parameterizing Lyapunov functions. In: Proceedings of the 18th International Conference on Informatics in Control, Automation and Robotics (ICINCO), 549–557, 2021).
Monogenity in totally real extensions of imaginary quadratic fields with an application to simplest quartic fields
Authors: Gaál István 
Published: April 2023

AbstractWe describe an efficient algorithm to calculate generators of power integral bases in composites of totally real fields and imaginary quadratic fields with coprime discriminants. We show that the calculation can be reduced to solving index form equations in the original totally real fields. We illustrate our method by investigating monogenity in the infinite parametric family of imaginary quadratic extensions of the simplest quartic fields.
Effect of gas spacing and resonance frequency on theoretical performance of thermoacoustic refrigerators
Authors: Prashantha B. G. , Seetharamu S. , Narasimham G. S. V. L. , Manjunatha K. 
Published: April 2023

AbstractIn this paper, the design and analysis of 500 W thermoacoustic refrigerators for the temperature difference of 28 K using helium and air are discussed. Helium is the best working gas, but air is chosen to study the possibility of replacing helium for the future cost-effective refrigerator since it is much cheaper than helium. Heat and work flow equations of thermoacoustic refrigerators are discussed. The refrigerator models are optimized by normalizing the design parameters using Rott’s linear thermoacoustic theory. The effect of gas spacing expressed in terms of the thermal penetration depth in stack-heat exchanger unit at 85% porosity is discussed. The effect of the resonance frequency of air on the stack-heat exchanger sheets spacing and thickness and on the theoretical performance is discussed. The effect of the resonance frequency of air on the theoretical performance at 200 Hz, 300 Hz, and 400 Hz is discussed. The cooler shows better COP of 1.72 at 300 Hz for air and 1.53 at 400 Hz for helium. The theoretical results are compared with the DeltaEC software results. The DeltaEC predicts cooling power and COP of 347 W at 1.02 for helium and 224 W at 0.79 for air, respectively.
Effectiveness of employer-provided financial education programs
Authors: Clark Robert L. 
Published: April 2023

AbstractWhile there have been numerous studies illustrating the rather low level of financial knowledge of Americans, there have been only a few efforts to examine the effectiveness of employer-provided programs in enhancing financial literacy and the ability of these programs to modify worker retirement and saving decisions. In this paper, I summarize the findings from a series of studies conducted over the past 20 years. All of the studies were done in conjunction with employers. The primary objectives of this research have been to evaluate the effectiveness of onboarding and retirement planning programs and the financial education provided in these programs. In addition, employer nudges to mid-career employees are examined. I describe the impact of financial planning programs on worker knowledge of key financial concepts and their ability to make better decisions concerning saving decisions and the timing of retirement. I also provide recommendations on how to improve the effectiveness of workplace financial education programs.
Spillover effects of financial education: The impact of school-based programs on parents
Authors: Frisancho Veronica 
Published: April 2023

AbstractThis paper studies whether school-based financial education has spillover effects from children to parents. Leveraging data from a large-scale experiment with public high schools in Peru and credit bureau records on the parents of the youth targeted, this study measures the impact of providing personal finance lessons during secondary school on parental financial behavior. Financial education lessons in the school yield limited average spillover effects, but lead to sizable effects on parental financial behavior within disadvantaged households. Among parents from poorer households, the treatment reduces default probability by 26%, increases credit scores by 5%, and increases current debt levels by 40%. The treatment has stronger effects among the parents of daughters, who experience a significant 6.7% increase in their credit score and a 28% reduction in their loan portfolio in arrears. Among the parents of boys, most of the spillover effects are muted.
The fear of missing out on cryptocurrency and stock investments: Direct and indirect effects of financial literacy and risk tolerance
Authors: Gerrans Paul , Abisekaraj Sherin Babu , Liu Zhangxin (Frank) 
Published: April 2023

AbstractThe “Fear of Missing Out” or FoMO has become an accepted motivator of behaviours extending from the purchase of limited-edition sneaker brands to social media use and cryptocurrency investment. As a motivator of individual financial behaviours, such as cryptocurrency and stock investment, it is unclear how FoMO relates to consumer financial literacy and other consumer traits, including risk tolerance and personality. We propose, and assess, a model of reported investment behaviour and investment behaviour intention. We find a larger association between FoMO and crypto ownership, both current and intended, compared with stocks. FoMO has a small association with current stock ownership, relative to the association of financial literacy and risk tolerance. Context matters when measuring FoMO with the more context-specific measures having the largest associations with investment behaviour and investment intentions. Finally, our results suggest financial literacy is an antecedent of FoMO, more so for stocks.
Increased markers of inflammation after cannabis cessation and their association with psychotic symptoms
Authors: Romeo Bruno , Lestra Valentine , Martelli Catherine , Amirouche Ammar , Benyamina Amine , Hamdani Nora 
Published: April 2023

AbstractIntroduction:A dysbalance of the immune system in psychotic disorders has been well investigated. However, despite a higher prevalence of cannabis (THC) consumption in patients with psychosis, few studies have investigated the impact of this use on inflammatory markers.Methods:One hundred and two inpatients were included in this retrospective study. Leukocytic formula, hsCRP, fibrinogen levels and urinary THC were measured, and comparisons were performed at baseline and after 4 weeks of cannabis cessation between cannabis users (THC+) and non-users (THC−).Results:After cannabis cessation, we found a greater increase in leucocyte level (p < 0.01), monocyte level (p = 0.05) and a statistical trend to a highest increase of lymphocyte level (p = 0.06) between baseline and 4 weeks in the THC+ group as compared to the THC− group. At 4 weeks, highest leucocyte (p = 0.03), lymphocyte (p = 0.04) and monocyte (p < 0.01) counts were found in the THC+ group, whereas at baseline no difference was found. A positive correlation was found between monocyte count at 4 weeks and baseline Positive and Negative Syndrome Scale (PANSS) negative subscore (p = 0.045) and between the variation of monocyte count between baseline and 4 weeks and the PANSS total score at 4 weeks (p = 0.05).Conclusion:THC cessation is associated with an increase in inflammatory markers, including white blood cell, lymphocyte and monocyte levels, which correlates with symptomatology of patients with psychosis.
K-STABLE DIVISORS IN OF DEGREE
Authors: CHELTSOV IVAN , FUJITA KENTO , KISHIMOTO TAKASHI , OKADA TAKUZO 
Published: April 2023

AbstractWe prove that every smooth divisor in$\mathbb {P}^1\times \mathbb {P}^1\times \mathbb {P}^2$of degree$(1,1,2)$is K-stable.