TL;DR: This study investigates the behavior of composite reinforced concrete columns encased by steel and GFRP sections under various loads, exploring their feasibility and effectiveness, and finds similar failure modes and increased strength and ductility in composite columns compared to traditional reinforced concrete columns.
Abstract: GFRP was employed in constructions as an alternative to steel, which has many advantages like lightweight, large tensile strength and resist corrosion. Existing researches are insufficient in studying the influence of hybrid reinforced concrete composite columns encased by GFRP I-section (RCCCEG) and I-section steel (RCCCES). In this study twenty one (RC) specimens of a cross-section of 130 mm × 160 mm, with different length (long 1600 mm and short 750 mm) were encased by using I-section (steel and GFRP) and tested under various loading (concentric, eccentric and flexural loads). The test was focused on the influence of many parameters; load-carrying capacity, mode of failure, deformation and drawing an interaction diagram (N-M) for columns. The research explores the feasibility and effectiveness of the employing GFRP and steel sections. The test results concluded that all the composite columns with I-section steel presented similar failure modes to I-section GFRP composite column. Increasing in strength and ductility in short and slender reinforced concrete composite columns related to reinforced concrete columns. The eccentric load has a significant reduction in column strength, especially in slender column. The 3D FE models of (RCCC) were established by ABAQUS. (RCCC) was studied in terms of failure mode, deformation and bearing capacity also an analytical study was employed to obtain analytical results for short specimens subjected to flexural load and employing these outcomes for drawing interaction diagram (N-M) for short columns. Based on the verification of FE analysis, the experimental and theoretical results showed a good agreement.
TL;DR: This study investigates the effect of conical section geometry on hydrocyclone classification performance, finding that curved cone geometries, particularly involute and parabolic cones, improve stability and classification efficiency compared to traditional linearly contracting base cones.
Abstract: Abstract The application of hydrocyclones dates back over a century. Their simple structure, lack of moving components, and ease of disassembly have led to widespread adoption across diverse separation industries. As the primary separation zone, the conical section significantly influences the classification performance of hydrocyclones. Therefore, selecting an appropriate conical geometry is critical for maintaining a stable internal flow field and ensuring regular particle migration. Conventional hydrocyclones typically employ a linearly contracting base cone as the wall structure for the conical section. However, the influence mechanism of curved cone geometries on classification performance remains unclear. In this study, five types of conical section profiles were investigated. Numerical simulation and laboratory experiments were used to evaluate their effects on hydrocyclone classification performance. Numerical analysis indicates that, compared to the traditional base cone, the internal flow field of the involute cone is more stable, with more consistent tangential velocity and a turbulence viscosity reduction of approximately 15%, which effectively reduces collisions and compaction between particles. The parabolic cone exhibits the lowest axial velocity, decreasing by about 1.2 m/s compared to the base cone, which can extend the residence time of the particles, allowing for more thorough classification. Laboratory experiments confirmed the classification performance differences among the five cone profiles. Specifically, the involute cone reduced the −25 μm particle content in the spigot by 6.02 percentage points and increased grade efficiency by 5.93 percentage points compared to the conventional base cone, significantly improving classification performance. These findings provide a theoretical foundation for the structural design of novel conical sections in hydrocyclones.
Mariana Díaz-Zaragoza, Sergio Yair Rodríguez‐Preciado, Lizeth Hernández-Ventura, Alejandro Ortiz-Covarrubias, Gustavo Castellanos-García, Sonia Sifuentes-Franco, Ana Laura Pereira-Suárez, José Francisco Muñoz‐Valle, Margarita Montoya‐Buelna, José Macías‐Barragán
TL;DR: This study evaluates antibiotic resistance in Escherichia coli from the Ameca River basin in Mexico, finding high resistance rates to ampicillin, tetracycline, and streptomycin, and significant associations with urban impact and seasonal variation.
Abstract: Antibiotic resistance (AR) in environmental Escherichia coli represents a growing public health challenge. This study evaluated the prevalence of AR among E. coli isolates recovered from surface water bodies within the Ameca River basin in Jalisco, Mexico, and examined associations with anthropogenic influence and seasonal variation. Over a 1-year period, water samples were collected monthly from 16 sites, including tributaries, wetlands, and main river channels with differing degrees of urban impact. E. coli isolates were confirmed by malB gene PCR and tested for susceptibility to six antibiotics using the Kirby–Bauer disk diffusion method. High resistance frequencies were observed for ampicillin (93.9%), tetracycline (92.4%), and streptomycin (89.6%), while gentamicin exhibited the lowest resistance rate (48.1%). Resistance prevalence was significantly higher at sites adjacent to urban settlements and during the rainy season (p < 0.05). These findings underscore the influence of land use and seasonal dynamics on AR dissemination in aquatic environments and highlight the need for improved wastewater management strategies to mitigate the spread of resistant bacteria.
TL;DR: This article examines the parallels between the UK's Section 28 moral panic and current transgender discourse, using moral panic theory to contextualize the historical forces driving laws around queer and trans lives, and their impact on law reform.
Abstract: A grounding in the queer history of the legal system in the United Kingdom reveals striking parallels between the moral panic leading to the enactment of Section 28 of the Local Government Act 1988, and the current moment’s discourse surrounding the inclusion of transgender people in social spaces and their potential right to self-identification of gender in law. Through use of moral panic theory, this article examines and contextualizes the historical forces at play in the formation of laws around queer and trans lives in the UK, and in particular the instrumentalization of fears over the safety of children and cisgender women. The article also provides a practical example of the influence of the trans moral panic on law reform, by evaluating the debate surrounding the Gender Recognition Reform (Scotland) Bill 2022. It concludes that there is no ‘gender crisis’ in the UK, but there are powerful social forces at work to stoke a moral panic and, in doing so, stigmatize and alienate trans people in a similar manner to the stigmatization of homosexuality as an illegitimate way of life under Section 28.
TL;DR: This retrospective study of 241 patients undergoing cesarean sections found that music therapy significantly reduced anxiety, stress indicators, and anesthesia requirements, improving mood and pain perception, and offering a safe nonpharmacological adjunct to standard care.
Abstract: Despite the rising rates of cesarean section globally, managing anxiety remains a challenge. Music therapy is a nonpharmacological treatment that may help alleviate anxiety and stress, improve mood, and reduce the need for anesthesia in patients undergoing cesarean section. This retrospective study analyzed 241 patients undergoing cesarean sections from January to October 2024. Participants were divided into a conventional group (n = 117), which received standard preoperative and intraoperative preparation, and a music therapy group (n = 124), which received additional music therapy. Music therapy was supplemented by playing customized music (e.g., soothing, therapeutic, or personalized tracks) through an audio device before and during the procedure. Anxiety was assessed using the State-Trait Anxiety Inventory-State subscale, and stress biomarkers were measured. Affective state, depression, pain perception, and anesthesia drug usage were evaluated using questionnaires and clinical data. After surgery, the music therapy group exhibited significantly reduced anxiety scores and lower stress indicators. Negative affect (13.23 ± 1.98 vs. 12.57 ± 2.01; P = 0.010), depressive symptoms (9.59 ± 2.13 vs. 10.17 ± 2.14; P = 0.034), and Visual Analog Scale scores for pain (3.65 ± 0.34 vs. 3.76 ± 0.47; P = 0.048) decreased. Furthermore, the music therapy group required fewer anesthesia drugs during surgery (P < 0.001). Music therapy demonstrates clinically meaningful reductions in perioperative anxiety, pain, and anesthetic requirements during cesarean delivery, offering a safe, nonpharmacological adjunct to standard care.
TL;DR: A study on cardiovascular risk in burn survivors in northern Iran has been retracted due to methodological flaws, insufficient references, and ethics statement inconsistencies, despite the authors' failure to respond to the retraction notice.
Abstract: RETRACTION: S. Samadi , A. Salari , M. Mobayen , M. Shakiba , A. Bazi , H. Hojjati , N. H. Pour , B. Farhadi , H. A. Otaghvar , A. Shirzadi , and M. Farzin , “,” International Wound Journal 21 , no. ( 2024 ): , https://doi.org/10.1111/iwj.14794 . The above article, published online on 29 February 2024 in Wiley Online Library ( http://onlinelibrary.wiley.com/ ), has been retracted by agreement between the journal Editor in Chief, Professor Keith Harding; and John Wiley & Sons Ltd. A third party reported evidence of excessive self‐citations by the authors. The publisher did not find that self‐citations were unreasonable, given the topic. However, the publisher determined that the Methods were insufficiently supported by the references. It was also determined that there were significant problems with the methodology underlying the study, a finding which was supported by a Letter to the Editor published by the journal [1] which identified numerous flaws including the lack of a control group of non‐burn patients. The investigation also found that the ethics statement contradicts the informed consent procedure outlined in the Methods section. In view of the major errors and inconsistencies identified, the editors have decided to retract the article. The authors did not respond to our notice regarding the retraction. Reference [1] M. Umar , K. Chattopadhyay , L. Shamim , and A. Visaria , “,” International Wound Journal 21 , no. ( 2024 ): , https://doi.org/10.1111/iwj.14794 .
TL;DR: This study assesses failure mechanisms of jacking prestressed concrete cylinder pipe (JPCCP) joints in Zhengzhou, China, identifying local tensile stress as the primary cause of cracking and fracture, and proposes novel approaches for improving construction techniques and optimizing joint design.
Abstract: Jacking prestressed concrete cylindrical pipe (JPCCP) is an innovative pipe that combines the benefits of prestressed concrete cylinder pipe (PCCP) and the pipe jacking method, playing a crucial role in water conservancy projects across China. Due to its structural characteristics and manufacturing process, the JPCCP joints are prone to circumferential cracks during jacking, and the harmful cracks can damage the inner concrete core over time, posing significant safety risks to the pipeline's structural integrity. To investigate the influence of jacking factors on cracking behavior at the JPCCP joints, this study examines the failure modes of concrete at the bell-spigot ends of the pipes. The analysis combines field experiments and numerical simulations, using data from China's largest diameter JPCCP project. The study finds that local tensile stress at the spigot end is the primary cause of cracking and potential fracture, and micro-cracks initially form on the inner surface of the damaged region, progressing circumferentially. Both the jacking force and deflection angle significantly affect the distribution and magnitude of the maximum principal stress in the concrete. The ultimate jacking forces for deflection angles of 0.1° and 0.5° are 3842 T and 1134 T, respectively. Controlling concrete cracking can be achieved in the construction process by reducing the relative deflection between adjacent pipes. This study introduces novel approaches for improving JPCCP construction techniques and optimizing joint design, providing valuable insights for future projects.
TL;DR: Archaeology plays a crucial role in addressing social justice, inequality, and human rights by revealing historical roots through material evidence, promoting Indigenous sovereignty, and advocating for ethical practices that align with the Universal Declaration of Human Rights.
Abstract: Abstract This section underscores archaeology’s evolving role in addressing social justice, inequality, and human rights by revealing the historical roots of these issues through material evidence. Archaeologists, mainly, promote Indigenous sovereignty and self-determination, responding to calls for engaged heritage practices and decolonization. Studies of burial practices, colonial exploitation, and modern racial discrimination highlight archaeology’s power to expose enduring inequalities. Ethical archaeology advocates revisiting institutional norms, integrating Indigenous knowledge, and aligning with the Universal Declaration of Human Rights, a stance emphasized in the chapter by Van Alst and Pyburn. Finally, this section examines contested heritage, restitution, and material culture to demonstrate how archaeology can actively contribute to a more equitable and just society.
TL;DR: This study investigates the effect of initiation and behavioral intention on exclusive breastfeeding after C-section, finding correlations between initiation, successful first breastfeeding, and exclusive breastfeeding, with negative attitude and cesarean section type as independent influencing factors.
Abstract: Objective: To investigate the effect of initiation and behavioral intention on exclusive breastfeeding one month after C-section. Methods: The demographic questionnaire, initiation and Modified Breast-feeding Attrition Prediction Tool (BAPT) were used to investigate the women who underwent C-section in a third-class a hospital in Qingdao from August to December 2019. Results: The initiated breastfeeding after returning to the ward, successful first breastfeeding, breastfed within 24 hours and the use of formula during hospitalization were correlated with exclusive breastfeeding. Logistic regression showed that negative attitude, subjective norms, practice control and cesarean section type were independent influencing factors of breastfeeding. Conclusion: Future studies can improve the rate of exclusive breastfeeding after C-section by establishing the initiation of exclusive breast-feeding and the elements of the intention to improve behavior.
TL;DR: This paper introduces "Terraformatics," a framework for non-universal, place-based research that acknowledges the complex, interconnected processes shaping collective conditions, offering methods for harm reduction, collective study, and worlding through a critical, anticolonial lens.
Abstract: This section describes analytic methods for place-based, nonuniversal obligated anticolonial study. It discusses the ways that methods of study are terraforming, bound up in the making of worlds and collective conditions. The term conditions is offered as a more capacious way to understanding the complex of material, earthly, living, social, affective, imaginative, machinic, spiritual, political, and epistemic processes involved in worlding. This section offers some humble methods for terraforming, harm reducing, and collective study.