bluuebunny/crossref_metadata_2025_split huggingface dataset:
Attention Focus and New Opportunities: The Moderating Role of Managerial Attention to Alternative Issues
Authors: Eklund John , Raj Manav , Eggers J. P. 
Published: May 2024

The strategy literature highlights the critical role that managerial attention plays in shaping firms’ responses to industry change. However, attention to change alone is not sufficient to precipitate action. The context in which this attention is paid is also critical in determining the translation of attention to action as managers generally pay attention to multiple issues within their strategic agendas. We argue that attention to a competing issue and the breadth of managerial strategic attention impair the relationship between attention to a focal issue and related organizational action as these attentional constraints may lead to hesitancy or confusion at an individual level and reduced coordination at an organizational level. Realizing that at an organizational level, firms vary tremendously with respect to their sizes, resources, and by implication their overall attentional capacities, we argue that the negative moderation impacts of attention to a competing issue and the breadth of strategic attention on the attention to a focal issue–subsequent action relationship are larger for smaller firms. Studying the U.S. electric utility industry and the emerging new distributed electricity generation business model, we find broad support for our arguments and also important nuance. By melding theory, important details of our empirical setting, and intriguing empirical results, we develop greater insights into when and how the other strategic issues to which managers pay attention can shape the translation of managerial attention to a new business model into subsequent organizational action. Supplemental Material: The online appendix is available at https://doi.org/10.1287/orsc.2021.15861 .
Bidirectional vortex beam and reflective polarization conversion terahertz metasurfaces
Authors: Li Jiu-Sheng , Jiang Ming-Yang , Xiong Ri-Hui 
Published: May 2024

We design a terahertz metasurface with the functions of bidirectional vortex beams and reflection polarization conversion. The unit cell of the proposed metasurface consists of a vanadium dioxide metal mixed layer, a dielectric layer, a vanadium dioxide thin film, a dielectric layer, and a metal open ring. At room temperature, when a left-handed circularly polarized wave is incident, the metasurface generates a reflected mode vortex beam with topological charges of l=−1 and l=−2 at frequencies of 0.33 and 0.34 THz. Simultaneously, the metasurface produces transmitted mode vortex beams with topological charges of l=−1 and l=−2 at frequencies of 0.33 and 0.36 THz. When the temperature changes to 68°C and y-polarized waves are incident, the metasurface generates a reflected left-handed circularly polarized wave in the frequency bands of 0.6–0.65 THz and 1.75–1.93 THz, and a right-handed circularly polarized wave in the frequency band of 0.86–0.9 THz, achieving the function of converting linearly polarized waves into circularly polarized waves. This metasurface provides a new method for designing a single metasurface structure to achieve bidirectional multifunctional terahertz devices for transmission and reflection modes. In addition, the designed metasurface achieves a perfect polarization conversion function that can convert linearly polarized waves into circularly polarized waves.
Prevalence and risk factors of cytomegalovirus reactivation in critically Ill patients with COVID-19 pneumonia
Authors: Tassaneeyasin Tanapat , Sungkanuparph Somnuek , Srichatrapimuk Sirawat , Charoensri Attawit , Thammavaranucupt Kanin , Jayanama Kulapong , Kirdlarp Suppachok 
Published: May 2024

Backgrounds
In critically ill patients with COVID-19, secondary infections are potentially life-threatening complications. This study aimed to determine the prevalence, clinical characteristics, and risk factors of CMV reactivation among critically ill immunocompetent patients with COVID-19 pneumonia.

Methods
A retrospective cohort study was conducted among adult patients who were admitted to ICU and screened for quantitative real-time PCR for CMV viral load in a tertiary-care hospital during the third wave of the COVID-19 outbreak in Thailand. Cox regression models were used to identify significant risk factors for developing CMV reactivation.

Results
A total of 185 patients were studied; 133 patients (71.9%) in the non-CMV group and 52 patients (28.1%) in the CMV group. Of all, the mean age was 64.7±13.3 years and 101 patients (54.6%) were males. The CMV group had received a significantly higher median cumulative dose of corticosteroids than the non-CMV group (301 vs 177 mg of dexamethasone, p<0.001). Other modalities of treatments for COVID-19 including anti-viral drugs, anti-cytokine drugs and hemoperfusion were not different between the two groups (p>0.05). The 90-day mortality rate for all patients was 29.1%, with a significant difference between the CMV group and the non-CMV group (42.3% vs. 24.1%, p = 0.014). Median length of stay was longer in the CMV group than non-CMV group (43 vs 24 days, p<0.001). The CMV group has detectable CMV DNA load with a median [IQR] of 4,977 [1,365–14,742] IU/mL and 24,570 [3,703–106,642] in plasma and bronchoalveolar fluid, respectively. In multivariate analysis, only a cumulative corticosteroids dose of dexamethasone ≥250 mg (HR = 2.042; 95%CI, 1.130–3.688; p = 0.018) was associated with developing CMV reactivation.

Conclusion
In critically ill COVID-19 patients, CMV reactivation is frequent and a high cumulative corticosteroids dose is a significant risk factor for CMV reactivation, which is associated with poor outcomes. Further prospective studies are warranted to determine optimal management.
Parameters of back filling material prepared from mine tailing, fly ash, and mine water
Authors: Dvořák Karel , Jančíková Andrea 
Published: May 2024

The article investigates the influence of mine tailing, fly ash, and mine water on strength parameters as mine paste filling material performing the strength tests on different recipes of mortar mixes with individual types of fillers and wastewater from extraction of mine tailings. Recipe is prepared in proportions corresponding to the standard mortar and compared with a reference recipe according to the fresh mortar consistency test using a shaking table according to ČSN EN 1015-3. Resulting measured values on 40 × 40 × 160 mm solids samples for which the evaluation of the volume weight was carried out in the range of 2, 7, 14, 28, 56 and 90 days according to EN 1015-10 (722400). The results showed that that it is possible to prepare relatively fluid mixtures with extremely low binder dosage. And not only the water coefficient but also the granulometry of the raw material plays an important role in the long-term strengths of samples.
The Mediating Effect of Optimism and Resourcefulness on the Relationship between Hardiness and Cyber Delinquent Among Adolescent Students
Authors: Alenezi Fahad Neda , Hashim Shahabuddin Bin , Alanezy Mashail , Alharbi Bader Falah 
Published: May 2024

AbstractThere is growing interested in the role of psychological resilience in shaping adolescent students’ delinquent behaviours in secondary schools. In this article, using locus of control theory, we examine the role of psychological resilience in terms of hardiness, resourcefulness, and optimism in minimizing the occurrence of cyber delinquent behaviours of secondary school students in Saudi Arabia. We introduce optimism and resourcefulness as protective factors critical for adolescents engaging in cyber delinquent behaviour and conceptualize them as characteristics of individuals with an internal locus of control. This study examines the multiple mediation effects of optimism and resourcefulness in the relationship between hardiness and cyber delinquent behaviours. The structural equation modelling results confirm eight hypotheses and that optimism and resourcefulness mediate the relationship between hardiness and cyber delinquent behaviours. These findings demonstrate the multiple mediation effects of optimism and resourcefulness and the important role of hardiness, resourcefulness, and optimism in predicting cyber delinquent behaviour. We draw implications for theory, secondary schools, and policymakers.
New indoor propagation model proposed for future B5G/6G rollout
Authors: Bagayogo Mamadou , Hamouda Soumaya , Barrak Rim 
Published: May 2024

AbstractThe rollout of the fifth-generation (5G) mobile network was completed in 2020. Now, the focus shifts towards exploring the new perspectives of Beyond 5G (B5G) and 6G. Despite being a key enabler of 5G, millimeter wave technology has not yet been fully implemented due to various deployment challenges. Over the past decade, numerous efforts have been dedicated to modeling the propagation channel across the spectrum from 0.5 to 100 GHz. Propagation models such as Close-In (CI), Floating Intercept (FI), and single frequency Alpha-Beta-Gamma (ABG) have been extensively utilized. However, a significant deviation between co- and cross-polarization models has been observed in many estimated models in the literature. In this paper, we propose an optimization of the classic CI model by considering both TX and RX antenna heights, along with a correction coefficient. Initially, we estimate the propagation channel using the classic CI model in indoor environments, revealing a notable deviation between co- and cross-polarization models. Subsequently, we introduce a new model aimed at reducing this deviation and optimizing the Path Loss Exponent (PLE). With our proposed model, the estimated channel depolarization in Line-of-Sight (LOS) conditions stands at 2.8 dB, 5.6 dB, and 2.9 dB for room, corridor, and stairwell environments, respectively. In contrast, utilizing the conventional model yields channel depolarization figures of 4.8 dB, 8.2 dB, and 7 dB for the same environments. This disparity in channel depolarization can have significant implications for millimeter wave propagation, particularly during meteorological events such as rainfall.
The effect of modified oily sludge on the slurry ability and combustion performance of coal water slurry
Authors: Chen Jianyang , Li Hanxu , Zhao Shuai , Li Dong , Wang Ningnig , Shen Shuhao , Mao Lirui 
Published: May 2024

Abstract
The aim of this study is to find a solution to the challenging problem of disposing oily sludge (OS). Three different types of modifiers, namely, sodium hydroxide (NaOH), sodium dodecylbenzene sulfonate (SDBS), and polyoxyethylene polyoxypropylene polyether (AE) were employed for the simple modification of OS. The influence of modified OS on slurry ability and combustion performance were investigated. The results showed that OS modified by NaOH and SDBS can increase the concentration of coal OS slurry. However, the influence of AE modification on slurry concentration is intricate. In terms of combustion performance, the change in activation energy results in NaOH and SDBS modifications decrease T
i and T
h of coal OS slurry, while AE modification increases T
i and T
h of coal OS slurry.
Hepatic arterial buffer response in monochorionic twins with selective fetal growth restriction
Authors: Cruz Jader de Jesus , Bernardeco Joana , Rijo Claudia , Cohen Alvaro , Serrano Fatima 
Published: May 2024

Abstract

Objectives
Monochorionic twins (MC) have higher risk of perinatal morbi-mortality compared to singletons and dichorionic twins (DC). Selective fetal growth restriction (sFGR) increases the chances of adverse outcome. Hepatic arterial buffer response (HABR) is an important mechanism for maintaining liver perfusion. We hypothesised that HABR is active in monochorionic diamniotic twins (MCDA) with sFGR where restricted fetus may have liver hypoperfusion. The objective of this study is to test whether the HAV-ratio is diminished in pregnancies affected by selective fetal growth restriction pointing to activation of HABR in the growth-restricted fetus.

Methods
sFGR was defined according to a consensus definition. Hepatic artery (HA) peak systolic velocity (PSV) was measured and its correlation with fetal Dopplers and pregnancy characteristics were determined. A ratio using HA-PSV (HAV-ratio) was calculated and its association with sFGR was established. Further analysis of HA-PSV was performed comparing z-scores between normal and growth restricted fetuses.

Results
We included 202 MCDA pregnancies, 160 (79 %) normal and 42 (21 %) with sFGR. HAV-ratio was significant different between groups. The mean HAV-ratio was 1.01 (±0.20) for normal twins and 0.77 (±0.25) for sFGR. Furthermore, HA-PSV z-scores was significant increased in in growth-restricted fetus (0.94±1.45), while in normal fetuses was −0.16 (±0.97).

Conclusions
Our findings demonstrate that, in pregnancies with sFGR, HAV-ratio is significantly lower than in normal MCDA pregnancies. The lower HAV-ratio is due to an increase in HA PSV in the growth restricted fetus. This observation indicates an activation of HABR in the small fetus.
Regulation of mesenchymal stem cell differentiation by autophagy
Authors: Wei Yanan , Zheng Zejun , Zhang Ying , Sun Jinmeng , Xu Shuangshuang , Di Xinsheng , Ding Xiaoling , Ding Gang 
Published: May 2024

Abstract
Autophagy, a process that isolates intracellular components and fuses them with lysosomes for degradation, plays an important cytoprotective role by eliminating harmful intracellular substances and maintaining cellular homeostasis. Mesenchymal stem cells (MSCs) are multipotent progenitor cells with the capacity for self-renewal that can give rise to a subset of tissues and therefore have potential in regenerative medicine. However, a variety of variables influence the biological activity of MSCs following their proliferation and transplantation in vitro. The regulation of autophagy in MSCs represents a possible mechanism that influences MSC differentiation properties under the right microenvironment, affecting their regenerative and therapeutic potential. However, a deeper understanding of exactly how autophagy is mobilized to function as well as clarifying the mechanisms by which autophagy promotes MSCs differentiation is still needed. Here, we review the current literature on the complex link between MSCs differentiation and autophagy induced by various extracellular or intracellular stimuli and the molecular targets that influence MSCs lineage determination, which may highlight the potential regulation of autophagy on MSCs’ therapeutic capacity, and provide a broader perspective on the clinical application of MSCs in the treatment of a wide range of diseases.
Role of ICAM-1 in triple-negative breast cancer
Authors: Zhang Ying , Fan Jingjing , Wang Xiaoli , Wu Zhongyu , Ma Weiqiang , Ma Binlin 
Published: May 2024

Abstract
Intercellular adhesion molecule-1 (ICAM-1) is related to the occurrence and development of a variety of tumors. However, the role of ICAM-1 in the regulation of growth, metastasis, and clinical prognosis of the specific molecular subtypes of breast cancer, triple-negative breast cancer (TNBC), remains to be elucidated. This study explored the role of ICAM-1 in breast cancer and its triple-negative subtypes by systematic bioinformatics methods. The results showed that the expression of ICAM-1 in breast cancer tissues was significantly higher than that in normal tissues, especially in TNBC subtypes. In breast cancer, ICAM-1 mainly activates pathways related to apoptosis and epithelial–mesenchymal transition, while its overexpression in TNBC is associated with inflammatory response, apoptosis, and other processes. TNBC patients displaying higher ICAM-1 expression demonstrate enhanced responses to immunotherapy. High ICAM-1 expression is sensitive to drugs targeting tumor cell proliferation, apoptosis, and angiogenesis. In conclusion, breast cancer is characterized by significantly high expression of ICAM-1, with TNBC subtypes expressing ICAM-1 at much higher levels than other subtypes. The diagnosis, prognosis, development, distant metastases, and immunotherapy of TNBC are correlated with high expression of ICAM-1. This research provides available data for the further study of the diagnosis and treatment of TNBC.
Experimental testing and numerical simulations of 3D-printed PETG pins used for vehicle pedals
Authors: Koksal Muhammed Ali , Yildiz Ahmet 
Published: May 2024

Abstract
In this study, experimental analyses and numerical simulations of polyethylene terephthalate glycol (PETG) pedal pins with optimum production parameters are performed concerning mechanical properties. The aim of this study is twofold: first, the effect of the three-dimensional (3D) manufacturing process, which has a significant impact on the mechanical properties of the 3D-printed part, is realized experimentally. Second, the mechanical behavior of the 3D-printed clutch pedal pin is evaluated using both numerical simulation and experimental tests, which is an important application for lightweight vehicles. It is observed that the determined production parameters can significantly improve the mechanical behavior of the materials and the pin of the vehicle pedal mechanism can be replaced with a lighter structure. Thus, the results obtained in this paper are of the utmost importance for the manufacturer to choose the optimum manufacturing parameters of three-dimensional printed materials and their application to vehicle pedals and other possible parts.
Gesundheitskompetenz von Studierenden. Befunde und Interventionsansätze
Authors: Dadaczynski Kevin , Messer Melanie , Okan Orkan 
Published: May 2024

Zusammenfassung
Angesichts der hohen Dynamik an gesundheitsbezogenen Informationen hat die Gesundheitskompetenz in den letzten 10 Jahren auch in Deutschland einen hohen Stellenwert erfahren. Für die Bevölkerungsgruppe der Studierenden liegen mittlerweile Studienbefunde zur allgemeinen und bereichsspezifischen Gesundheitskompetenz vor. Der vorliegende Beitrag gibt einen Überblick über die deutschsprachige Studienlage und stellt Ansätze der Public Health-Praxis exemplarisch vor.
Gesundheitsförderung an Hochschulen in Deutschland: Eine Übersicht
Authors: Stock Christiane 
Published: May 2024

Zusammenfassung
Hochschulen sind ein wichtiges Setting für Gesundheitsförderung. Dieser Artikel beschreibt die Bedeutung und Entwicklung der Gesundheitsförderung an Hochschulen in Deutschland. Dabei werden sowohl fördernde Strukturen als auch Probleme für die nachhaltige Umsetzung eines Ansatzes der Gesundheitsfördernden Hochschulen in den Blick genommen.
Promovieren mit gesundheitlichen Beeinträchtigungen oder Behinderungen
Authors: Rhein Karoline , Bauer Jana F. , Groth Susanne , Niehaus Mathilde 
Published: May 2024

Zusammenfassung
In Deutschland sind Promovierende mit Behinderungen und gesundheitlichen Beeinträchtigungen eine sowohl in der Forschung als auch der Praxis bisher kaum berücksichtigte Personengruppe. In diesem Beitrag fassen wir praxisrelevante Erkenntnisse für drei Handlungsfelder (Sichtbarkeit und Unterstützung, Betreuung und Förderung sowie zeitliche und rechtliche Rahmenbedingungen) aus der wissenschaftlichen Begleitung des bundesweiten Projektes PROMI – Promotion inklusive zusammen.
Empfehlungen zu Nachteilsausgleichen und Teilhabeleistungen im Studium aus rechtssoziologischer Sicht
Authors: Janßen Christina , Welti Felix 
Published: May 2024

Zusammenfassung
Studierende mit gesundheitlichen Beeinträchtigungen haben Anspruch auf Nachteilsausgleiche und Teilhabeleistungen, um am Studium teilhaben zu können. Insbesondere Studierende mit unsichtbaren Beeinträchtigungen verzichten aber häufig auf die Beantragung von Nachteilsausgleichen. Empfehlenswert ist eine stärkere Sensibilisierung der Lehrenden, der Ausbau von Beratungsangeboten sowie eine Verlagerung der Entscheidungskompetenzen über Nachteilsausgleiche.
Die psychische Gesundheit Studierender mit digitalen Angeboten fördern
Authors: Kählke Fanny , Pyttlik Anna , Küchler Ann-Marie , Baumeister Harald 
Published: May 2024

Zusammenfassung
Die Förderung der psychischen Gesundheit ist zentral für Lebensqualität, körperliches Wohlbefinden, akademische Leistungsfähigkeit und soziale Teilhabe von Studierenden. Evidenzbasierte Internet- und mobilbasierte Interventionen (IMI) können klassische psychosoziale Beratungsangebote ergänzen und eröffnen neue Wege der Versorgung. Anhand des StudiCare Projekts werden die Wirksamkeit, Adhärenz, Inanspruchnahme(-barrieren), Limitationen und zukünftige Entwicklungen vorgestellt und diskutiert.
Achtsamkeit bei Studierenden
Authors: Jansen Petra 
Published: May 2024

Zusammenfassung
Achtsamkeit als Eigenschaft kann als die nicht wertende Präsenz im jetzigen Moment beschrieben werden. Zentrale Aspekte der Achtsamkeit sind die Aufmerksamkeits- und Emotionsregulation, das Körperbewusstsein und die Perspektivenfähigkeit. Studierende erleben in jüngster Zeit im Studium einen größeren Stress als in früheren Jahren, sodass sich ein Stressreduzierungstraining durch Achtsamkeit anbietet. Die positive Wirkung dieser Trainings bei Studierenden konnte bereits nachgewiesen werden.
Digitale Gesundheitsförderung an Hochschulen
Authors: Salewski Christel , Schnädter Stefanie 
Published: May 2024

Zusammenfassung
Die Gesundheit Studierender wird durch wachsende inner- und außeruniversitäre Anforderungen beeinträchtigt. Die App Stressdown wurde als zielgruppenspezifische digitale Stressmanagement-Intervention für Fernstudierende entwickelt und evaluiert. Erste positive Ergebnisse bestätigen auch, dass die App Barrieren bei der Nutzung gesundheitsförderlicher Programme verringern kann. Diese Erkenntnisse stützen ähnliche Resultate zu digitalen Gesundheitsförderungsmaßnahmen bei Präsenzstudierenden.
Gesundheit von Fernstudierenden stärken
Authors: Pundt Johanne , Schöpke Birte 
Published: May 2024

Zusammenfassung
Spezielle Bedingungen des Fernstudiums charakterisieren diese Studienform. Sich der Gesundheit von Fernstudierenden zu widmen, reflektiert die Lebenswelten dieser berufstätigen Gruppe, denn aufgrund von studienbezogenen Belangen und Mehrfachbelastungen können gesundheitsbeeinträchtigende Faktoren die Folge sein. Um dem entgegenzuwirken, greifen zahlreiche zielgruppenspezifische Maßnahmen, damit eine gesundheitsförderliche Bewältigung als wesentlicher Erfolgsfaktor im Fernstudium realisiert wird.
Bewegt studieren – studieren bewegt an der Universität Bayreuth
Authors: Helten Jessica , Tittlbach Susanne 
Published: May 2024

Zusammenfassung
Das Projekt ‚Students BeWegt 2.0‘ setzt daran an, das Bewegungs- und Sitzverhalten von Studierenden im Setting Hochschule zu verbessern sowie deren Konzentrationsfähigkeit und das Wohlbefinden zu erhöhen. Dafür wurden sechs Maßnahmen an der Universität Bayreuth (weiter-)entwickelt und implementiert. Die Ergebnisse verdeutlichen den Erfolg einer partizipativen Zusammenarbeit verschiedener Stakeholder und die Verknüpfung unterschiedlicher, bewegungsfördernder Maßnahmen.