bluuebunny/crossref_metadata_2025_split huggingface dataset:
More excitement across the horizon
Authors: Preciado-Rivas María R. , Naeem Manar , Mann Robert B. , Louko Jorma 
Published: July 2024

An Unruh-DeWitt detector falling radially into a four-dimensional Schwarzschild black hole, coupled linearly to a massless scalar field that has been prepared in the Hartle-Hawking or Unruh state, has recently been shown to exhibit a local extremum in its transition probability near the black hole horizon [K. K. Ng , ]. We show that a similar phenomenon is present in the transition rate of an Unruh-DeWitt detector falling radially into a spinless Bañados-Teitelboim-Zanelli black hole, with the scalar field prepared in the Hartle-Hawking state. We give extensive numerical results as a function of the detector’s energy gap, the black hole’s mass, and the detector’s drop-off radius. Our results suggest that the effect is robust, motivating a search for a similar effect in other black hole spacetimes, and calling for an explanation of the physical origin of the effect.

Published by the American Physical Society
2024
Trapped Atoms and Superradiance on an Integrated Nanophotonic Microring Circuit
Authors: Zhou Xinchao , Tamura Hikaru , Chang Tzu-Han , Hung Chen-Lung 
Published: July 2024

Interfacing cold atoms with integrated nanophotonic devices could offer new paradigms for engineering atom-light interactions and provide a potentially scalable route for quantum sensing, metrology, and quantum information processing. However, it remains a challenging task to efficiently trap a large ensemble of cold atoms on an integrated nanophotonic circuit. Here, we demonstrate direct loading of an ensemble of up to 70 atoms into an optical microtrap on a nanophotonic microring circuit. Efficient trap loading is achieved by employing degenerate Raman-sideband cooling in the microtrap, where a built-in spin-motion coupling arises directly from the vector light shift of the evanescent-field potential on a microring. Atoms are cooled into the trap via optical pumping with a single free space beam. We have achieved a trap lifetime approaching 700 ms under continuous cooling. We show that the trapped atoms display large cooperative coupling and superradiant decay into a whispering-gallery mode of the microring resonator, holding promise for explorations of new collective effects. Our technique can be extended to trapping a large ensemble of cold atoms on nanophotonic circuits for various quantum applications.

Published by the American Physical Society
2024
Building information modeling (BIM) implementation and construction project success in Malaysian construction industry: mediating role of project control
Authors: Waqar Ahsan , Othman Idris Bin , Mansoor Muhammad Shoaib 
Published: July 2024

PurposeThe primary objective of this study is to analyze the correlation between the application of building information modeling (BIM), the construction project success (CPS) and project control. Additionally, this research aims to explore the potential mediating effect of project control on the link between BIM and construction project success in the Malaysian construction industry.Design/methodology/approachThe present study employs a quantitative research methodology and adheres to a positivist research philosophy in order to examine the influence of BIM implementation on the CPS and project control within the Malaysian construction sector. The data were collected by structured questionnaire survey from 200 respondents using a purposive sampling strategy, and the results were analyzed by using partial least square (PLS)-structural equation modeling (SEM). The study's findings are all the more noteworthy since, despite the small sample size, 218 persons genuinely participated thanks to the purposive sampling approach.FindingsThe findings of this study indicate that there are notable and positive associations between various variables related to the implementation of BIM. These variables include accurate quantities and estimations, risk management, facility management integration, optimized resource allocation and real-time monitoring. Furthermore, these relationships are observed to have a significant impact on both CPS and project control. The study revealed that project control serves as a mediator in the relationship between the deployment of BIM and the CPS in the Malaysian construction sector, with the exception of its influence on risk management.Originality/valueThe originality of this research consists in examining the mediating function of project control in the relationship between BIM implementation and CPS. This study contributes to the existing knowledge by enhancing our understanding of the processes via which BIM positively influences project outcomes.
A clash of clans: an empirical study of conflicting institutional logics and their impact on megaproject collaboration
Authors: af Hällström Anna 
Published: July 2024

PurposeManaging megaprojects is challenging due to their inherent complexity and uncertainty. Collaborative project delivery models have been introduced as an alternative to traditional project management in public infrastructure megaprojects and are often realized through collaborative contracts. These project organizations act as institutional arenas for logic interaction as actors with differing institutional backgrounds interact within the project. This paper aims to study the delivery phase of three megaprojects through an institutional lens, investigating the institutional interaction and alignment of logics therein.Design/methodology/approachA multiple case study was employed to reach deep insight into the phenomenon. Sixty-one interviews were conducted over 3 cases with representatives from all levels of the project hierarchy. Respondents were selected through snowball sampling. In two cases, observations of the shared project office were conducted. Data analysis built on first-order codes and second-order themes, collected into a theoretical framework.FindingsThe empirical evidence demonstrates the dynamics shaping institutional logics and gives evidence for changing logics in projects with a well-applied collaborative contract. However, there is a risk of resistance and a return to traditional logics since institutional change is slow and an unsuitably applied collaborative contract can lead to adherence to the conventional way of work.Originality/valueCurrent research has focused on the regulatory framework and procurement phase of such models, but little attention has been given to the delivery phase and the interaction of conflicting logics. This paper can serve as an exemplar of the different logics found within public infrastructure projects and their interaction and alignment. Contributions include a heightened emphasis on the start of the project as a meeting point for differing institutional logics and the role change necessary when using a collaborative contract.
The effect of friction characteristics on electromagnetic impact deformation mechanism of 2A10 aluminum alloy bars
Authors: Zhang Xu , Tang Kangjie , Wang Yingyu , Dong Dongying 
Published: July 2024

Purpose
The purpose objective of this study is to identify the friction coefficient and friction effect in electromagnetic upsetting (EMU) high-speed forming process.

Design/methodology/approach
Based on numerical simulation and upsetting experiment of 2A10 aluminum alloy bar, the friction coefficient between contact surfaces is obtained by combining the fitting displacement distribution function and the electromagnetic-mechanical coupling numerical model, and the influence of friction effect is analyzed.

Findings
The maximum impact velocity and acceleration during EMU are 13.9 m/s and −3.3 × 106 m/s2, respectively, and the maximum strain rate is 7700 s−1. The functional distribution relationship between friction coefficient combination (FS, FD) and characteristic parameters [upper diameter (D1) and middle diameter (D2)] is established. The values of FS and FD are 0.1402 and 0.0931, respectively, and the maximum relative error is 2.39%. By analyzing the distribution of equivalent stress and strain, it is found that plastic deformation has obvious zoning characteristics and there is serious failure concentration in the strong shear zone.

Originality/value
Friction coefficient significantly affects stress or strain distributions in material forming process, but it is difficult to obtain friction coefficients through experimental tests in the high-speed forming process. In this paper, a multi-field coupling numerical model is proposed to determine friction coefficients and applied to the electromagnetic impact loading process (a high-speed forming process).

Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2024-0154/
Open-plan office employees’ perceived mental and social well-being
Authors: Ramantswana Thabelo , Mmamabolo Lebogang Bridget , Appel-Meulenbroek Rianne 
Published: July 2024

Purpose
Over the past century, office designers have adapted to changing work conditions across various industries by creating workspaces that cater to the needs of modern workers. As a result, a range of office layouts have been developed, from traditional private offices to open-plan setups. The choice of layout can significantly impact communication, social interaction and overall performance. This study aims to explore the social and mental well-being of employees working in open-plan offices in the public sector in South Africa.

Design/methodology/approach
The research was conducted in the Johannesburg Metropolitan Municipality, South Africa, focusing on five governmental departments. Using purposive sampling, employees working in open-plan offices were identified. A structured online interview form with open-ended questions was distributed to all selected employees between May and September 2021, resulting in 54 responses. Thematic content analysis using ATLAS.ti was used to analyze the data.

Findings
The findings suggest that while open-plan offices can enhance teamwork, communication, accessibility and inclusivity, their design can negatively affect employees’ perceptions of social and mental health in the workplace. Specifically, open-plan designs are perceived to compromise privacy, shorten attention spans, lower productivity and increase stress levels. Interestingly, absenteeism was not reported by employees in this study, which contradicts previous research and requires further investigation.

Practical implications
These findings can be valuable for human resource managers, facilities managers and office space designers.

Originality/value
This research contributes to the ongoing conversation surrounding the impact of open-plan offices on the mental and social well-being of employees in the public sector within the South African context. The contribution of this paper thus lies in the South-African context and the public sector angle plus a more in-depth insight on well-being through an extensive set of 54 interviews.
On teaching Holocaust geographies: supporting inquiry into space, persecution and civic action
Authors: Eargle Jeffrey C. , Mewborne Michael 
Published: July 2024

PurposeIn this article, the authors – a social studies methods professor and geography research associate – make the case for considering the integration of Holocaust geographies into the middle and secondary curriculum, potential challenges that teachers may have in teaching Holocaust geographies are addressed.Design/methodology/approachUsing an experience in delivering professional development on Holocaust geographies to teachers to frame the discourse within the article, the authors contend that a study of Holocaust geographies tests geography as a discipline, addresses current problems and supports student inquiry. Therefore, the inclusion of the Holocaust in the geography curriculum is both needed and valuable.FindingsExamining the Holocaust spatially using geographical skills moves students away from the potential limits of studying the Holocaust temporally using only historical skills. Thus, the distance between past and present, although not ignored, is narrowed through the inquiry into spatial patterns and characteristics, providing the potential to bring greater focus on present-day antisemitism, persecution, genocide and authoritarianism.Originality/valueEducators are encouraged to take up work that intersects the civic goals of both geography and Holocaust education, yet literature on these intersections is sparse. We call upon Holocaust education and geography education organizations to develop and provide support for teachers around Holocaust geographies.
Aboveground biomass estimation of an old‐growth mangrove forest using airborne LiDAR in the Philippines
Authors: Mandal Mohammad Shamim Hasan , Suwa Rempei , Rollon Rene N. , Albano Giannina Marie G. , Cruz Green Ann A. , Ono Kenji , Primavera‐Tirol Yasmin H. , Blanco Ariel C. , Nadaoka Kazuo 
Published: July 2024

AbstractMonitoring mangrove forest biomass is vital for assessing their carbon sequestration potential. This study uses airborne LiDAR data to estimate the aboveground biomass (AGB) of an old‐growth mangrove forest in the Katunggan It Ibajay Ecopark (KII Ecopark) on Panay Island, Philippines. To establish a relationship between the LiDAR canopy height profile with the field observed AGB at the plot level, we tested 20 LiDAR derived relative height (RH) metrics. First, we tested a relationship between field observed Lorey's mean canopy height (Hm) and RH metrics, which were then used to estimate AGB by applying a previously established allometric model. Second, we tested the direct relationship between RH metrics and observed AGB. Among RH metrics, RH95 showed the best correspondence with the Hm (R2 = 0.79) and when it was applied to the previously developed allometric for AGB estimation, the results showed a large underestimation of AGB (R2 = 0.46) for plots with higher canopy heights. Conversely, the direct method using a power regression model with RH95 and observed AGB provided a better estimate (R2 = 0.58). However, both models still underestimated AGB at the KII Ecopark. We conclude that, LiDAR‐based AGB estimation using Hm as a single variable can result in considerable underestimation, especially in old‐growth mangrove forests such as KII Ecopark. Further studies are necessary to develop accurate models for estimating AGB in such special types of mangroves which is important for mangrove monitoring, reporting and verification (MRV).
Understanding emulsifier influence on complex coacervation: Essential oils encapsulation perspective
Authors: Napiórkowska Alicja , Szpicer Arkadiusz , Górska‐Horczyczak Elżbieta , Kurek Marcin 
Published: July 2024

AbstractThe objective of this research was to explore the viability of pea protein as a substitute for gelatin in the complex coacervation process, with a specific focus on understanding the impact of incorporating an emulsifier into this process. The study involved the preparation of samples with varying polymer mixing ratios (1:1, 1:2, and 2:1) and emulsifier content. As core substances, black pepper and juniper essential oils were utilized, dissolved beforehand in grape seed oil or soybean oil, to minimize the loss of volatile compounds. In total, 24 distinct samples were created, subjected to freeze‐drying to produce powder, and then assessed for their physicochemical properties.Results revealed the significant impact of emulsifier addition on microcapsule parameters. Powders lacking emulsifiers exhibited higher water solubility (57.10%–81.41%) compared to those with emulsifiers (24.64%–40.13%). Moreover, the emulsifier significantly decreased thermal stability (e.g., without emulsifier, Ton = 137.21°C; with emulsifier, Ton = 41.55°C) and adversely impacted encapsulation efficiency (highest efficiency achieved: 67%; with emulsifier: 21%).
Discovering the volatilome fingerprint of selected traditional Cuban wines elaborated with native grapes, tropical fruits, and rice using DHS–TD–GC–MS
Authors: Moyano Lourdes , Varo M. Ángeles , Núñez Lázaro , López‐Toledano Azahara , Serratosa María P. 
Published: July 2024

AbstractCuban wine is a traditional alcoholic beverage elaborated with a wide variety of raw materials, such as native grapes, tropical fruits, and rice, and different winemaking processes. Research on Cuban wines is almost nonexistent, and therefore, a study of these wines is necessary to improve their quality. Dynamic headspace (DHS)‐TD‐gas chromatography–mass spectrometry (GC–MS) analysis was carried out to establish the different aroma fingerprints of different Cuban wines. A total of 42 volatile aroma metabolites (VAMs) were identified, including esters, alcohols, aldehydes, acids, volatile phenols, terpenes, and lactones. The odorant activity values (OAV) of each VAM were obtained, and the esters were the most relevant group due to their highest OAV. Ethyl octanoate, hexanoate, and butanoate stand out and are considered key odorants in the aromatic fingerprint. The VAMs were grouped into seven aromatic series. Fruity series showed the highest OAVs due to the contribution of ethyl esters and acetates. Principal component analysis was used to identify the specific parameters most accurately reflecting the differences between the wines. Showing that fruity, spicy, and chemical aromatic series allow distinguishing the wines into three aroma types. These results may provide useful information for the selection of raw materials and optimization of the traditional winemaking processes of Cuban wines.Practical ApplicationThis research contributes to knowledge of the aroma and the oenological parameters of traditional and selected Cuban wines (rice wine, tropical fruit wine, and native grape varieties). The establishing of the aroma fingerprint of these wines provides useful information for the industrial development of a quality product that may then be promoted in other areas of the world.
Delirium diagnostic tools in the postoperative setting: A scoping review protocol
Authors: Hansen Charlotte Levy , Thomsen Thordis , Tøgern Aske , Møller Ann Merete , Vester‐Andersen Morten , Overgaard Søren , Foss Nicolai Bang , Hägi‐Pedersen Daniel 
Published: July 2024

AbstractBackgroundDelirium is an acute and fluctuating disturbance in attention, awareness, and cognition, commonly observed in hospital settings, particularly among older adults, critically ill and surgical patients. Delirium poses significant challenges in patient care, leading to increased morbidity, mortality, prolonged hospital stays, and functional decline.AimThe aim of this review is to map existing evidence on delirium diagnostic tools suitable for use in patients treated surgically due to hip fracture, to inform clinical practice and enhance patient care protocols in the postoperative setting.MethodWe will conduct a scoping review on delirium diagnostic tools used for adult patients in the postoperative setting according to the Preferred Reporting Items for Systematic Reviews and Meta‐Analyses extension for Scoping Reviews (PRISMA‐ScR). Eligibility criteria encompass all languages, publications dates, and study designs, with exception of case‐reports. We will systematically search multiple databases and include unpublished trials, ensuring a comprehensive review based on a predefined protocol.ResultsResults will be presented descriptively, with supplementary tables and graphs. Studies will be grouped by design, surgical specialties, and diagnostic tools to identify potential variations.ConclusionThis scoping review will provide an overview of existing delirium diagnostic tools used in the postoperative setting and highlight knowledge‐gaps to support future research. Due to the large number of patients affected by postoperative delirium, evidence mapping is much needed to facilitate evidence‐based practice.
Temporal and behavioural niche partitioning underlies coexistence within a native‐exotic rodent assemblage exploiting a high‐value limited resource
Authors: Cordero Sebastián , Gálvez Francisca , Fontúrbel Francisco E. 
Published: July 2024

AbstractNiche partitioning is a common strategy species use to avoid competition for limited resources, allowing them to coexist. Rodent species often reduce competition by spatial segregation and trophic differentiation, but behavioural differences, particularly related to foraging, can also be important. Therefore, temporal segregation can also be an important mechanism for species coexistence, as it helps them avoid sub‐optimal habitats. We found three rodent species (the native Octodon degus and O. lunatus, and the exotic Rattus rattus) foraging on endemic palm Jubaea chilensis seeds, a highly valuable but limited resource. We hypothesized that these rodent species could coexist by segregating foraging in time, showing behavioural differences. To test this, we used camera traps to monitor the fate of J. chilensis seeds and rodent activity at 25 feeding stations. From 596 photographic records, we identified 128 as O. degus, 232 as O. lunatus and 236 as R. rattus. Octodon degus had a diurnal activity, while O. lunatus and R. rattus were nocturnal, showing significant temporal segregation. However, we found no spatial association among these rodents. We found significant behavioural differences in decision and handling times and seed removal rates, with O. degus having the greatest seed removal rate. Nevertheless, we found some nocturnal O. degus records in which the three rodent species were co‐foraging, which may suggest that the resource is limited but valuable enough to shift from exploitation to interference competition. Our results suggest that temporal and behavioural differentiation are more important than spatial segregation and trophic differentiation. Thus, niche partition over multiple dimensions might allow for species coexistence.
Psychological sequelae following second‐trimester termination of pregnancy: A longitudinal study
Authors: Dawood Yousif , de Vries Jana M. , van Leeuwen Elisabeth , van Eekelen Rik , de Bakker Bernadette S. , Boelen Paul A. , Pajkrt Eva 
Published: July 2024

AbstractIntroductionThe decision to terminate a pregnancy due to fetal anomalies can have a significant emotional impact, especially in second‐trimester terminations. Previous studies on the psychological consequences of pregnancy termination have had limitations, and little is known about the outcomes for partners and the impact of fetal donation. Therefore, we aimed to investigate the psychological effects of second‐trimester pregnancy termination and identify factors associated with outcomes in both women and men, including donation of fetal remains to science.Material and MethodsA longitudinal cohort study was conducted at the Amsterdam UMC in the Netherlands, involving women and partners who underwent termination at or before 23 weeks and 6 days of gestation. Questionnaires were administered at termination, 6 weeks, and 4 months after. We utilized validated questionnaires to assess psychological morbidity (grief, post‐traumatic stress and postnatal depression and quality of life [QoL]), and factors that could potentially influence outcomes.ResultsOf 241 participants, women displayed more pronounced psychological distress than men, though both groups improved over time. Four months after termination, 27.4% of women and 9.1% of men showed signs of pathological grief. Scores indicative for postnatal depression occurred in 19.8% women and 4.1% of men. A prior psychiatric history was a consistent predictor of poorer outcomes. Fetal donation to the Dutch Fetal Biobank was associated with reduced likelihood of symptoms of complicated grief four months after termination.ConclusionsSecond‐trimester termination of pregnancy for fetal anomalies can lead to psychological morbidity, particularly in women. However, there is a notable improvement over time for both groups. Individuals with prior psychiatric history appear more vulnerable post‐termination. Also, fetal donation to science did not have a negative impact on psychological well‐being.