bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cement hydration mechanisms through time – a review
Authors: John Elisabeth , Lothenbach Barbara 
Published: June 2023

AbstractIn this article the progress of the research on cement hydration mechanisms is critically reviewed, starting with the work of Le Chatelier and Michaelis during the late nineteenth century. Proposed mechanisms are discussed in the light of experimental data to highlight the role of new or improved analytical techniques. The focus of this article lies on the dormant period and the silicate reaction. Today many of the mechanisms proposed throughout time cannot withstand experimental evidence and need to be rejected, including the classical protective hydrate layer theory. However, it seems likely that hydrated surface species are involved in the mechanism. Theories that aim to explain the rate changes solely based on the nucleation and growth of portlandite can also not withstand experimental evidence. Nevertheless, the retardation of portlandite crystal growth through silicate ions is a relevant factor. Especially since it might present a mechanism for the nucleation of calcium silicate hydrate (C–S–H), backing up theories that propose C–S–H and portlandite to grow from the same nuclei. Finally, an overview over facts, that are currently considered to be valid and hence need to be regarded in the future mechanisms is given.
Magnetothermal Properties and Magnetocaloric Effect in the 3d Ferromagnetic Elements: Fe, Co, and Ni
Authors: ElNegery Eman Z. , Asaad Hala , Aly Samy H. , Yehia Sherif , Mohammad Fatema Z. 
Published: June 2023

AbstractWe present a calculation of magnetothermal properties and magnetocaloric effect (MCE) for the ferromagnetic elements: Fe, Co, and Ni. In particular, we calculated the temperature and field dependences of magnetization, heat capacity, entropy, isothermal entropy change $$\Delta {S}_{m}$$

Δ

S
m

, adiabatic temperature change ΔTad, and the two figures-of-merit: the relative cooling powers RCP(S) and RCP(T). We have used the mean-field theory in calculating the magnetization, magnetic heat capacity, and magnetic entropy. The lattice and electronic contributions to the total heat capacity and entropy were calculated using standard relations to subsequently calculate $$\Delta {T}_{ad}$$

Δ

T

ad

. Those contributions depend on the Debye temperature ϴD and the coefficient of the electronic heat capacity γe respectively. The Maxwell relation is used to calculate $$\Delta {S}_{m}$$

Δ

S
m

and $$\Delta {T}_{ad}$$

Δ

T

ad

. As an example of our results, the maximum $$\Delta {S}_{m}$$

Δ

S
m

for the three elements, in 6 T, is between 0.17 to 0.36 J/mol K and the maximum $$\Delta {T}_{ad} \mathrm{}$$

Δ

T

ad

is between 0.46 to 1.5 K/T for the same field change. The relative cooling power RCP(S) is in the 15–36 J/mol range for the three elements in a 6 T field. Also, the relative cooling power, RCP (T), is in the 162–1044 $${K}^{2}$$

K

2

range for the same field. For Fe and Co the RCP (T) per Tesla values, i.e., 139 and 174 $${K}^{2}/T$$

K

2

/
T

respectively are comparable to that of Gd and other Gd-based magnetocaloric materials. The behavior of the magnetization, magnetic heat capacity, and magnetic entropy shows that the phase transition in these three elements is of the second order. The universal curve and Arrott plots further support this conclusion.
Lorentzian manifolds properly isometrically embeddable in Minkowski spacetime
Authors: Minguzzi E. 
Published: June 2023

AbstractI characterize the Lorentzian manifolds properly isometrically embeddable in Minkowski spacetime (i.e., the Lorentzian submanifolds of Minkowski spacetime that are also closed subsets). Moreover, I prove that the Lorentzian manifolds that can be properly conformally embedded in Minkowski spacetime coincide with the globally hyperbolic spacetimes. Finally, by taking advantage of the embedding, I obtain an infinitesimal version of the distance formula.
Pairwise Markov Models and Hybrid Segmentation Approach
Authors: Kuljus Kristi , Lember Jüri 
Published: June 2023

AbstractThe article studies segmentation problem (also known as classification problem) with pairwise Markov models (PMMs). A PMM is a process where the observation process and underlying state sequence form a two-dimensional Markov chain, it is a natural generalization of a hidden Markov model. To demonstrate the richness of the class of PMMs, we examine closer a few examples of rather different types of PMMs: a model for two related Markov chains, a model that allows to model an inhomogeneous Markov chain as a conditional marginal process of a homogeneous PMM, and a semi-Markov model. The segmentation problem assumes that one of the marginal processes is observed and the other one is not, the problem is to estimate the unobserved state path given the observations. The standard state path estimators often used are the so-called Viterbi path (a sequence with maximum state path probability given the observations) or the pointwise maximum a posteriori (PMAP) path (a sequence that maximizes the conditional state probability for given observations pointwise). Both these estimators have their limitations, therefore we derive formulas for calculating the so-called hybrid path estimators which interpolate between the PMAP and Viterbi path. We apply the introduced algorithms to the studied models in order to demonstrate the properties of different segmentation methods, and to illustrate large variation in behaviour of different segmentation methods in different PMMs. The studied examples show that a segmentation method should always be chosen with care by taking into account the purpose of modelling and the particular model of interest.
Apple ripeness identification from digital images using transformers
Authors: Xiao Bingjie , Nguyen Minh , Yan Wei Qi 
Published: June 2023

AbstractWe describe a non-destructive test of apple ripeness using digital images of multiple types of apples. In this paper, fruit images are treated as data samples, artificial intelligence models are employed to implement the classification of fruits and the identification of maturity levels. In order to obtain the ripeness classifications of fruits, we make use of deep learning models to conduct our experiments; we evaluate the test results of our proposed models. In order to ensure the accuracy of our experimental results, we created our own dataset, and obtained the best accuracy of fruit classification by comparing Transformer model and YOLO model in deep learning, thereby attaining the best accuracy of fruit maturity recognition. At the same time, we also combined YOLO model with attention module and gave the fast object detection by using the improved YOLO model.
Friendship networks in inclusive elementary classrooms: Changes and stability related to students’ gender and self-perceived social inclusion
Authors: Garrote Ariana , Zurbriggen Carmen L. A. , Schwab Susanne 
Published: June 2023

AbstractFriendships with classmates play a significant role in student’s development. However, only some friendships are maintained for longer than a school year and their formation depend on many factors. One important factor is gender because gender homophily is consistently found in friendship networks. In addition, there is evidence that same-gender friendships are more stable. In the context of inclusive education, friendship can be considered as one of four key dimensions of social inclusion. While three of these dimensions are assessed from others’ perspective, self-perception of social inclusion focuses solely on the individual students’ view. However, hardly any studies investigated how students’ self-perception of social inclusion is related to friendships, and more specifically, whether and how self-perceived social inclusion is related to changes in friendship networks in the classroom. To contribute to this research gap, friendship networks of 280 students aged 9–11 years (49% girls) in 15 classes of Grade 4 were examined at the beginning and at the end of one school year. Network changes were analyzed with longitudinal social network analyses. Students’ gender and self-perception of inclusion were added as predictors of changes in the friendship networks. The results confirmed gender homophily for formation and stability. The analyses also showed that students who perceived themselves as socially included nominated more best friends at the end of the school year but were not necessarily perceived as best friends by their peers. This highlights the importance of considering different perspectives to better understand social inclusion in classrooms.
The division of cognitive labor and the structure of interdisciplinary problems
Authors: Reijula Samuli , Kuorikoski Jaakko , MacLeod Miles 
Published: June 2023

AbstractInterdisciplinarity is strongly promoted in science policy across the world. It is seen as a necessary condition for providing practical solutions to many pressing complex problems for which no single disciplinary approach is adequate alone. In this article we model multi- and interdisciplinary research as an instance of collective problem solving. Our goal is to provide a basic representation of this type of problem solving and chart the epistemic benefits and costs of researchers engaging in different forms of cognitive coordination. Our findings suggest that typical forms of interdisciplinary collaboration are unlikely to find optimal solutions to complex problems within short time frames and can lead to methodological conservatism. This provides some grounds for both reflecting on current science policy and envisioning more effective scientific practices with respect to interdisciplinary problem solving.
Epistemic injustice, naturalism, and mental disorder: on the epistemic benefits of obscuring social factors
Authors: Degerman Dan 
Published: June 2023

AbstractNaturalistic understandings that frame human experiences and differences as biological dysfunctions have been identified as a key source of epistemic injustice. Critics argue that those understandings are epistemically harmful because they obscure social factors that might be involved in people’s suffering; therefore, naturalistic understandings should be undermined. But those critics have overlooked the epistemic benefits such understandings can offer marginalised individuals. In this paper, I argue that the capacity of naturalistic understandings to obscure social factors does not necessarily cause epistemic injustice and can even help people to avoid some epistemic injustice. I do this by considering how some individuals with bipolar disorder deploy the neurobiological understanding of their disorder, highlighting three functions it fills for them: explanation, disclamation, and decontestation. In performing these functions, the neurobiological understanding does marginalise alternative, social perspectives on bipolar disorder. However, this can be understood as a feature rather than a bug. By marginalising alternative explanations, the neurobiological understanding can help individuals with bipolar disorder resist epistemic injustice, including, for example, the trivialisation of their experiences. Given this, critics seeking to undermine naturalistic understandings of mental disorder and other experiences in the pursuit of epistemic justice themselves risk exacerbating epistemic injustice.
Oxytetracycline-induced inflammatory process without oxidative stress in blue mussels Mytilus trossulus
Authors: Hallmann Anna , Leszczyńska Dagmara , Czumaj Aleksandra , Świeżak Justyna , Caban Magda , Michnowska Alicja , Smolarz Katarzyna 
Published: June 2023

Abstract
Potentially harmful compounds including pharmaceuticals are commonly found in marine waters and sediments. Amongst those, antibiotics and their metabolites are detected worldwide in various abiotic (at concentrations as high as µg/L) and biotic matrices at ng/gram of tissue, posing a risk to non-target species exposed to them such as blue mussels. Amongst those, oxytetracycline (OTC) belongs to the most detected antibiotics in the marine environment. In this work, we concentrated on studying the potential induction of oxidative stress, activation of cellular detoxification processes (including Phase I and Phase II xenobiotic biotransformation enzymes) and multixenobiotic resistance pumps (Phase III) as well as changes in the aromatisation efficiency in Mytilus trossulus exposed to 100 μg/L OTC. Our results show that 100 µg/L OTC concentration did not provoke cellular oxidative stress and did not affect the expression of genes involved in detoxification processes in our model. Moreover, no effect of OTC on aromatisation efficiency was found. Instead, phenoloxidase activity measured in haemolymph was significantly higher in OTC exposed mussels than in those from the control (30.95 ± 3.33 U/L and 17.95 ± 2.75 U/L, respectively). OTC exposed mussels were also characterised by a tissue-dependant activation of major vault protein (MVP) gene expression (1.5 times higher in gills and 2.4 times higher in the digestive system) and a decreased expression of the nuclear factor kappa B-a (NF-κB) gene (3.4 times lower in the digestive system) when compared to those from the control. Additionally, an elevated number of regressive changes and inflammatory responses in tissues such as gills, digestive system and mantle (gonads) was observed underlining the worsening of bivalves’ general health. Therefore, instead of a free-radical effect of OTC, we for the first time describe the occurrence of typical changes resulting from antibiotic therapy in non-target organisms like M. trossulus exposed to antibiotics such as OTC.
Zero-Range Hamiltonian for a Bose Gas with an Impurity
Authors: Ferretti Daniele , Teta Alessandro 
Published: June 2023

AbstractWe study the Hamiltonian for a system of N identical bosons interacting with an impurity, i.e., a different particle, via zero-range forces in dimension three. It is well known that, following the standard approach, one obtains the Ter-Martirosyan Skornyakov Hamiltonian which is unbounded from below. In order to avoid such instability problem, we introduce a three-body force acting at short distances. The effect of this force is to reduce to zero the strength of the zero-range interaction between two particles, i.e., the impurity and a boson, when another boson approaches the common position of the first two particles. We show that the Hamiltonian defined with such regularized interaction is self-adjoint and bounded from below if the strength of the three-body force is sufficiently large. The method of the proof is based on a careful analysis of the corresponding quadratic form.
Interventional Cardio-Oncology: Unique Challenges and Considerations in a High-Risk Population
Authors: Leiva Orly , Alam Usman , Bohart Isaac , Yang Eric H. 
Published: June 2023

Opinion StatementPatients with cancer are at risk of developing cardiovascular disease (CVD) including atherosclerotic heart disease (AHD), valvular heart disease (VHD), and atrial fibrillation (AF). Advances in percutaneous catheter-based treatments, including percutaneous coronary intervention (PCI) for AHD, percutaneous valve replacement or repair for VHD, and ablation and left atrial appendage occlusion devices (LAAODs) for AF, have provided patients with CVD significant benefit in the recent decades. However, trials and registries investigating outcomes of these procedures often exclude patients with cancer. As a result, patients with cancer are less likely to undergo these therapies despite their benefits. Despite the inclusion of cancer patients in randomized clinical trial data, studies suggest that cancer patients derive similar benefits of percutaneous therapies for CVD compared with patients without cancer. Therefore, percutaneous interventions for CVD should not be withheld in patients with cancer, as they may still benefit from these procedures.
‘Blowjobs are Jobs Too’: An Exploratory Study into Victimization Experiences of Male Sex Workers in Botswana
Authors: Mashumba Lesedi 
Published: June 2023

AbstractThis study conducted in-depth face to face interviews with twenty male sex workers (MSWs) servicing sex tourists in Botswana. Expert opinions were also sought with support organizations and the police in Botswana to understand more about male sex work in Botswana. The research questions were directed at exploring (a) how male sex workers experienced and perceived victimisation in their interactions with sex tourists, (b) what role support groups played, and (c) what reforms both male sex workers and support groups propose for the male sex work industry. The article presents their victimisation experiences, health risks and opinions of the support groups. The study found out that MSWs frequently experienced physical violence and sexual assaults such as stealthing, especially male sex workers who identified as gay or bisexual. MSWs never reported their victimisation experiences to the police due to fear of stigmatisation, shaming and possible arrests given the partial criminalisation of sex work. Support groups on the other, as non-governmental organizations offered the much-needed support services such as distribution of lubes, condoms, HIV screening, counselling, and ARV and PrEP access and management for sex workers. This study contributes to the limited literature examining the experiences of MSWs, demonstrating their vulnerability and the need for interventions to mitigate their victimisation and protect their health. Many sex workers emphasised constitutional protections of their rights, the need to decriminalise, as well as the promotion of safety and security. The study argues that traditionally, culture and religion have produced a gender-biased socio-cultural parameters that place males as providers, hence, their vulnerability to victimisation and sexual violence is often unnoticed, which also makes reporting difficult to law enforcement.
When push comes to shove - RNA polymerase and DNA-bound protein roadblocks
Authors: Hao Nan , Donnelly Alana J. , Dodd Ian B. , Shearwin Keith E. 
Published: June 2023

Abstract
In recent years, transcriptional roadblocking has emerged as a crucial regulatory mechanism in gene expression, whereby other DNA-bound obstacles can block the progression of transcribing RNA polymerase (RNAP), leading to RNAP pausing and ultimately dissociation from the DNA template. In this review, we discuss the mechanisms by which transcriptional roadblocks can impede RNAP progression, as well as how RNAP can overcome these obstacles to continue transcription. We examine different DNA-binding proteins involved in transcriptional roadblocking and their biophysical properties that determine their effectiveness in blocking RNAP progression. The catalytically dead CRISPR-Cas (dCas) protein is used as an example of an engineered programmable roadblock, and the current literature in understanding the polarity of dCas roadblocking is also discussed. Finally, we delve into a stochastic model of transcriptional roadblocking and highlight the importance of transcription factor binding kinetics and its resistance to dislodgement by an elongating RNAP in determining the strength of a roadblock.
Requesting HIV Results Be Conveyed in-Person: Perspectives of Clinicians and People Recently Diagnosed with HIV
Authors: Wells Nathanael , Murphy Dean , Ellard Jeanne , Howard Chris , Keen Phillip , Fairley Christopher , Donovan Basil , Prestage Garrett ,   on behalf of the RISE Study Team
Published: June 2023

Abstract

Introduction
Guidelines recommend that, where possible, clinicians convey HIV-positive test results in person in Australia. However, HIV-negative and all other STI results are routinely delivered by phone or text message. Requesting individuals to obtain positive HIV test results in person could be a deviation from the standard delivery of healthcare and be interpreted as indicating a positive HIV diagnosis.

Methods
This paper is based on two related, ongoing qualitative studies conducted in Australia with HIV healthcare providers and people recently diagnosed with HIV. In study one, in-depth, semi-structured interviews were conducted with people who had recently received a positive HIV diagnosis. In study two, in-depth, semi-structured interviews were conducted with HIV healthcare and peer support providers. Interviews were analyzed thematically.

Results
While clinicians were willing to convey HIV-positive diagnoses by phone, most preferred in-person delivery. In-person delivery enabled clinicians to assess visual cues to better respond to the psychological and emotional needs of patients. For some participants living with HIV, however, the requirement to return to the clinic was interpreted as an unofficial HIV-positive diagnosis. This led to a period in which recently diagnosed participants believed they were HIV-positive without having received an explicit diagnosis.

Conclusion
Protocols for delivering HIV diagnoses by phone, followed by a face-to-face appointment, may reduce the period of anxiety for some patients and assist with an early connection to HIV care and support.

Policy Implications
In some instances, conveying HIV diagnoses by phone may be more appropriate than recalling individuals to the clinic to deliver a positive HIV diagnosis in person.
I Am More than HIV: A Qualitative Exploration of Factors That Can Strengthen Resilience Among HIV-Positive Gay Men in Australia
Authors: Lucas Neil A. , Bates Glen W. , Buzwell Simone 
Published: June 2023

Abstract
Introduction
HIV-positive gay men continue to experience stigma related to sexual orientation and HIV status. Although resilience toward such stressors can be achieved, limited Australian research exists that examines how resilience is strengthened toward these dual stigmas.

Methods
A total of 20 men from Melbourne, Australia, participated in semi-structured interviews between March and October 2019 to explore ways in which they manage such stigmas.

Results
Reflexive thematic analysis identified two primary themes: (1) “intrapersonal control,” which relates to individual mind set and lifestyle changes that participants utilized to strengthen resilience; (2) “systemic change,” which includes participants’ needs for better public health messaging. Findings show resilience was enhanced when proactive approaches to sexual orientation, HIV health appraisal, lifestyle changes, and social support were made. Further, outdated HIV awareness campaigns and a lack of current messaging regarding HIV transmission in the wider community were identified as inhibiting resilience development and promoting stigma among gay men.

Conclusion
The results from this study show ways that Australian gay men strengthen their resilience through both intrapersonal (e.g., self-awareness, reappraisal, and self-efficacy) and external resources (e.g., education and public awareness) and how health care providers and social policy makers could better support the men to achieve this.

Social-Policy Implications
Findings suggest that targeted public health responses are required to compliment the advances made in biomedicine and viral suppression.