bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of various environments on the mechanical properties of nanoclay reinforced S‐glass/sisal hybrid polyester composites
Authors: Mallampati Somaiah Chowdary , Gujjala Raghavendra , Manne Anupama Ammulu , Kumar M. S. R. Niranjan , Suyambulinagm Indran , Siengchin Suchart , Bandaru Aswani Kumar 
Published: June 2024

AbstractThis investigation aims to study the influence of various environments, such as groundwater, seawater, mineral water and sub‐zero, on reinforced polyester/S‐glass/sisal composites with nano clay (NC). Composites with a configuration of S‐glass/sisal/sisal/S‐glass (GSSG) with different wt% of NC, such as 0, 2, 4, and 6, were manufactured using the hand lay‐up method. For 6 days, the composites were conditioned in different environments like seawater, mineral water, groundwater at room temperature, and sub‐zero environments at −17°C. The influence of these environments on the tensile and flexural properties of manufactured composites was studied. Composites with 4% NC displayed higher tensile strength, while composites with 2% NC exhibited maximum flexural strength for all the environments. It was perceived that the weight gain was maximum in seawater (0.1857 g) and minimum in mineral water (0.06 g) and sub‐zero (0.101 g) conditions for 6% NC condition. Tensile and flexural strengths were reduced by 27% and 24% when samples were submerged in seawater compared to other environments. TEM images for 4 wt% of NC and 6 wt% of NC were studied for dispersions of NC in Polyester, and the effect of NC mixing with polyester was understood for the hybrid polymer composites.Highlights
A novel hybrid composites were fabricated using a double stirring process.
The ultra‐sonication led to uniform distribution of nanoparticles.
The mechanical properties and the effect of environments on these properties are studied.
SEM images revealed the aging due to various environments.
The hybrid composites can store mineral water and the sub‐zero environment.
Coffee grounds as sustainable filler for bio‐based rubber composites
Authors: Öncel Şehriban , Ünügül Tuba , Abacı Ufuk , Karaağaç Bağdagül 
Published: June 2024

AbstractUsing biological/renewable resources as filler or modifier in both thermoplastics and rubbers has been of a great interest in order to reduce negative effects of traditional petroleum/natural gas based fillers. In this study, the main goal was the use of spent (waste) coffee grounds as a natural alternative filler to carbon black in acrylonitrile butadiene rubber (NBR) based compounds. Carbon black (CB) was partially replaced with fresh as well as spent coffee grounds (SCG) in NBR compound formulation. Stabilization effect of fresh coffee grounds was also investigated. Cure characteristics, physico‐mechanical, thermal, morphological, and dielectric properties of the bio‐based composites were tested and compared with the control (reference) compounds. Processability has been affected positively in the case of using coffee grounds thanks to the presence of triacyl groups in coffee. Up to 20% higher elongation at break values were measured when coffee is partially replaced with CB. Abrasion loss and oil resistance could be retained for coffee containing compounds. In conclusion, SCG were found to be a good natural alternative filler for bio‐based NBR composites without a significant change in material properties.Highlights
Spent coffee grounds ‐ a sustainable filler in bio‐based NBR composites
Both fresh and spent coffee grounds are successful stabilizers
Physico‐mechanical, thermal, and dielectric properties are comparable
Fabrication of pressure visual fiber based on liquid metal control thermochromic pigments
Authors: Wang Huabing , Yue Xinyan , Shen Xiuyu , Wang Xianlin , Zheng Riquan , Han Qinghe , Li Xiaoqiang , Jin Yang 
Published: June 2024

AbstractIn this study, pressure visual fibers (PVF) with a core‐shell structure were prepared using a coaxial wet spinning process. The fiber composite shell consists of a luminescent material (as a light source) and a thermochromic pigment (as a filter light source) mixed with a polyacrylonitrile (PAN) matrix. The fiber core layer, on the other hand, was made of gallium‐indium alloy liquid metal. In operation, the filter light source is activated by joule heat drive (resulting in the fading of the thermochromic pigment), and the PVF releases phosphorescence upon exposure to ultraviolet light. When a certain pressure is applied to the fiber shell, the liquid metal in the core layer is squeezed, resulting in a local cross‐sectional area reduction, an increase in local joule thermal power, and thus local discoloration. This localized compression, in combination with a small rated current and the presence of an ultraviolet light source, converts the mechanical force (strain and compression) into an optical response. The excellent electrical conductivity of the liquid metal, combined with its compatibility with the soft matrix, makes it a promising candidate for applications in smart textiles and flexible sensing.Highlights
The technology of visual fiber controlled by current is presented.
The bendability and controllability of visual composites are improved.
The composite fiber can be visualized when stressed.
Enhancing high‐temperature mechanics and degradation for phthalonitrile resin via constructing rare earth oxide supported low melt‐point molten oxide
Authors: Fan Haizhou , Ren Zhiyi , Xun Lijiao , Guo Ying , Zheng Kun , Zou Renzhen , Li Min , Zhou Heng , Zhao Tong 
Published: June 2024

AbstractIn order to improve the comprehensive performance of thermosetting phthalonitrile resin (PN) composites, a novel molten hybrid (Nd2O3@DM35) was successfully prepared by loading Neodymium Oxide (Nd2O3) on the surface of low melt‐point molten oxide (DM35). In thermal gravimetric analysis, the addition of 30 wt% Nd2O3@DM35 postponed the temperature of 5% mass loss (T5%) of PN hybrid (PN‐NdD30) from 485 to 521°C. A series of thermal aging experiments were designed to prove the thermal stability of modified PN. The surface morphology of PN‐NdD30 was mostly maintained after thermal aging. Compared with pure PN, the flexural strength (FS) and interlaminar shear strength (ILSS) of PN‐NdD30 composites at room temperature increased by 31.4% and 32.8%, respectively. After aging at 400°C for 20 min, the FS and ILSS retention rates of PN‐NdD30 composites were 78.4% and 91.5%, respectively. In this work, the introduction of novel hybrid improved the thermal stability of PN composites, while enhancing their mechanical properties at different temperatures. Based on all the results, the heat resistance and mechanical mechanism of PN‐NdD30 composites were carefully analyzed.Highlights
A molten hybrid was prepared by Nd2O3 and low melt‐point molten oxide.
The novel hybrid can form a continuous protective layer at high temperatures.
In the aging test, the mass loss of PN‐NdD30 was significantly reduced.
Mechanical properties of PN composites at different temperatures were improved.
A novel molten concept was introduced in the heat resistance modification of PN.
Collaborative multi‐scale optimization of molding processes for thermosetting/quartz fiber composites based on balancing between efficiencies and mechanical properties
Authors: Yuan Jianyang , Chen Qihui , Gao Yong , Tai Jieyu , Liu Yaqing 
Published: June 2024

AbstractIn terms of the interplay between manufacturing cost and quality during the molding of fiber reinforced thermosetting composites, this study proposes a multi‐scale collaborative optimization strategy aimed at shortening molding time and reducing the diminishing defects generated during the process. Macro‐scale thermochemical and micro‐scale thermomechanical calculations are conducted on the composite molding to analyze the origins of temperature gradients and residual stresses. Then, the curing cycle, temperature gradient in the macro‐scale model, and residual stresses in the micro‐scale model are optimized by combining finite element analysis with the Non‐dominated Sorting Genetic Algorithm II. Several curing processes within the Pareto front were selected, and their impact on compressive performance was assessed through experimental analysis. Compared to the standard curing process (SCP), the optimal curing process exhibited a 41.4% reduction in maximum temperature gradient (∆Tmax), a 25.2% decrease in effective residual stress , and a 20.0% increase in compressive strength. Multi‐scale collaborative optimization strategies are integral to the advancement of production and application of fiber‐reinforced thermoset composites. Multi‐scale collaborative optimization strategies are integral to the advancement of production and application of fiber‐reinforced thermoset composites.Highlights
Investigated of interactions among components in composites molding.
Optimization of composite molding process with Non‐dominated Sorting Genetic Algorithm II and finite element.
Examined the impact of composite molding process on compressive performance.
Delivery room and early postnatal management of neonates with congenital heart disease
Authors: Ali Noorjahan , Donofrio Mary T. 
Published: June 2024

AbstractAdvancements in prenatal detection have improved postnatal outcomes for patients with congenital heart disease (CHD). Detailed diagnosis during pregnancy allows for preparation for the delivery and immediate postnatal care for the newborns with CHD. Most CHDs do not result in hemodynamic instability at the time of birth and can be stabilized following the guidelines of the neonatal resuscitation program (NRP). Critical CHD that requires intervention immediately after birth is recommended to be delivered in facilities where immediate neonatal and cardiology care can be provided. Postnatal stabilization and resuscitation for these defects warrant deviation from the standardized NRP. For neonatal providers, knowing the diagnosis of fetal CHD allows for preparation for the anticipated instability in the delivery room. Prenatal detection fosters collaboration between fetal cardiology, cardiology specialists, obstetrics, and neonatology, improving outcomes for neonates with critical CHD.
Outcomes after surgical and nonsurgical treatment of pediatric cerebral cavernous malformation
Authors: Zhang Haohao , Yu Qishuai , Mao Zhiqi , Zhang Liang , Yu Xinguang 
Published: June 2024

ABSTRACTImportancePediatric cerebral cavernous malformation (CCM) is a rarely encountered vascular entity. Comparative study on surgical excision and nonsurgical management outcomes of CCM in pediatrics is limited.ObjectiveTo determine the demographic characteristics, hemorrhage rate, and long‐term outcomes of pediatric patients with CCM.MethodsA retrospective study of pediatric patients with CCM in Chinese PLA General Hospital was conducted between January 2004 and January 2019. We compared the clinical characteristics, radiological features, and outcomes of the surgical and nonsurgical groups.ResultsSeventy‐nine children were included, with 69.6% being boys, and the average age was 11.8 ± 5.5 years. The annual retrospective hemorrhagic rate was 5.7% per patient per year. Fifty‐six children (70.9%) underwent surgical excision, and they were more likely to present with seizure symptoms (P = 0.011), have a higher proportion of larger lesion size (P = 0.008), less likely to have durations ≤10 days (P = 0.048), and less likely to have supratentorial deep CCM (P = 0.014) compared to children who received nonsurgical management. Total resection was achieved in most surgical cases (55, 98.2%). During the 143.9 ± 50.8 months of follow‐up, 44 patients (78.6%) achieved improvement, 12 patients (17.8%) remained the same, and two (3.6%) experienced worsening. In the nonsurgical management group, 14 children (60.9%) experienced symptom improvement, eight (34.8%) remained the same, and one (4.3%) worsened, with a re‐hemorrhagic risk of 8.7%.InterpretationSurgical removal of pediatric CCM can eliminate the risk of hemorrhage and lead to satisfactory outcomes. For children undergoing nonsurgical management, long‐term close monitoring is essential due to the life‐long risk of hemorrhage.
An unusual case of persistent consolidation: Idiopathic lymphoid interstitial pneumonia
Authors: Caterson Harriet J. , Kim Sewon , Zaborowski Matthew , Harden Michael , Hibbert Michael 
Published: June 2024

AbstractLymphocytic interstitial pneumonia (LIP) is a rare but largely benign interstitial lung disease, most frequently associated with HIV and autoimmune conditions. It is infrequently found to be an idiopathic condition. Diagnosis is complex and can require numerous invasive tests as evidenced in the case presented. The diagnosis is made from a combination of clinical, radiological, and histological features but the unusual radiological and clinical features meant diagnosis in our case required surgical biopsy. There is minimal evidence around best treatment although largely involves targeting the underlying cause. There is a small risk of transformation to lymphoma and fibrosis. Immunosuppression with steroids is the most common therapeutic strategy however in our case the radiographic changes spontaneously resolved. We present a case of an immunocompetent male presenting with significant radiological and histopathological findings of LIP, without significant symptomatology, that spontaneously resolved without intervention suggesting a monitoring approach may be a valid management strategy.
Unravelling lung adenocarcinoma in an immunocompetent patient with endobronchial aspergilloma: A case report
Authors: Ng Khai Lip , Huan Nai‐Chien , Tan Wei Loon , Aminudin Nur Husna Mohd , Hassan Fazilah , Nordin Kasuma Mohamed 
Published: June 2024

AbstractInhalation of Aspergillus spp. can cause a wide spectrum of lung diseases. Endobronchial aspergilloma is an uncommon clinical entity that occurs because of Aspergillus spp. overgrowth in the airway lumen. We present a 73‐year‐old gentleman with a rare dual pathology of endobronchial aspergilloma and endobronchial adenocarcinoma. He initially presented with prolonged cough, dyspnoea, and haemoptysis. Bronchoscopy revealed an obstructed right main bronchus by a necrotic mass whereby histological examination showed evidence of Aspergillus spp. infection. The lesion however persisted despite treatment with anti‐fungal agents. Repeated bronchoscopy and biopsy eventually unravelled an underlying endobronchial adenocarcinoma. He received chemotherapy but ultimately passed away 3 months later.
Further results on fixed‐time stability of time‐varying hybrid systems
Authors: Chen Guopei , Yang Ying 
Published: June 2024

AbstractThe introduction of time‐varying factors makes it difficult and complex to study the stability of hybrid systems. How to improve the traditional stability analysis method to study the stability of time‐varying hybrid systems is a great challenge. In this paper, the fixed‐time stability (FxTS) of time‐varying hybrid systems is investigated. Starting with time‐varying nonlinear systems, two relaxed stability conditions are proposed to verify the FxTS of systems by using the time‐varying Lyapunov functions. Then, the obtained results are extended to study the FxTS of time‐varying hybrid systems, some improved stability conditions are given by combining the methods of minimum dwell time and multiple time‐varying Lyapunov functions. Compared with the existing results, the obtained conditions are less conservative and provide the more accurate estimations for the convergence time of systems. Two numerical examples are given to illustrate the theoretical results.
Being Human in the Age of Generative AI: Young People's Ethical Concerns about Writing and Living with Machines
Authors: Higgs Jennifer M. , Stornaiuolo Amy 
Published: June 2024

AbstractThe recent unveiling of chatbots such as ChatGPT has catalyzed vigorous debates about generative AI's impact on how learners read, write, and communicate. Largely missing from these debates is careful consideration of how young people are experiencing AI in their everyday lives and how they are making sense of the questions that these rapidly evolving cultural tools raise about ethics, power, and social participation. Engaging cultural‐historical perspectives on technology, the present study drew on student survey and focus group data from English language arts classes in two culturally and linguistically diverse high schools to answer the following questions: (1) How are young people using AI in their everyday lives, if at all?; (2) What do young people identify as key considerations related to AI‐mediated writing?; and (3) What ethical and critical considerations, if any, inform young people's sensemaking of and practices with AI? Young people reported using generative AI for diverse purposes in and out of school, including to accomplish routine organizational and information tasks, to entertain themselves through experimenting with AI technologies, and to catalyze their thinking and writing processes. Survey and focus group participants' responses suggested their regular navigation of ethical and critical dimensions of AI use and their contemplation of what it means to be human through and with advancing technologies. Young people also reported a lack of opportunity to examine AI practices and perspectives in school, suggesting the important role schools can play in supporting youths' development of AI ethics.
Effect of soil sample handling and storage on inorganic nitrogen determination: Implications for the presidedress nitrate test
Authors: Janovicek Kenneth , Wang Huaichun , McDonald Ian , Rosser Ben , Lauzon John , Sulik John , Susko Edward , Nasielski Joshua 
Published: June 2024

AbstractThe presidedress nitrate test (PSNT) is a nitrogen (N) fertilizer decision support system (DSS) that uses soil test nitrate (NO3−) to provide an N rate recommendation for corn. We studied the effect of soil sample storage and handling on soil test NO3−, ammonium (NH4+), and the N rate recommended by the PSNT. Soils from 35 agricultural fields located in southern Ontario, Canada, were collected in June and July and underwent two soil storage treatments and four soil handling treatments. Soils were either handled immediately or frozen (−15°C) for 3 months before handling. Soil handling included (1) immediate extraction in a moist state or oven‐drying for 24 h at (2) 35°C, (3) 65°C, or (4) 105°C. Samples were extracted with a 2.0 M KCl solution for inorganic N determination and immediate, fresh‐extracted samples served as baseline soil test values. Ammonium‐N was increased by freezing and drying at any temperature, while NO3− test values were significantly affected by freezing only. However, oven‐drying samples changed PSNT DSS N rate recommendations in 34%–43% of location‐years when handled immediately and 51%–68% of samples when initially frozen, depending on drying temperature. Most of these deviations were underapplications and relatively small when handled immediately (20 kg N ha−1) or frozen (37 kg N ha−1). We conclude that PSNT samples should not be frozen and that oven‐drying often alters PSNT‐based N rate recommendations.
Financial development and sustainable development: A review of literature
Authors: Akhtar Nayab , Rashid Abdul 
Published: June 2024

AbstractIn the contemporary world, the sustainability of the economic system and its related issues are of major concern for both policy makers and practitioners. The financial sector's role in this context has gained significant attention over the past decades. Although theoretical studies are on the rise, few scholars consolidate both theory and practice. This study addresses this gap through comprehensive bibliometric analysis, mapping the research landscape in the finance‐sustainability field, and encompassing both optimistic and skeptical perspectives. It reviews and synthesizes key theoretical and empirical literature focusing on most recent studies. Specifically, it emphasizes broader aspects of financial development—depth, access, efficiency, and stability—in critically analyzing the economic, environmental, and social pillars of sustainable development, which are distinct yet highly interconnected. It further provides a detailed analysis of sustainable development theories, highlighting their shortcomings and future prospects. Particularly, this study identifies different dimensions, significant factors, and important indicators of sustainability which are vital for achieving and understanding long‐term sustainable development. Some practical implications are also discussed.
The influence of coercive pressures on reporting on SDGs during the COVID‐19 pandemic: An international study
Authors: Sari Tiyas Kurnia , Sholihin Mahfud , Wijayana Singgih 
Published: June 2024

AbstractThe sustainable development goals (SDGs) are recognized as global development guidelines for 2030. The accounting profession can contribute to achieving these goals by encouraging reporting on SDGs at the company level. The increasing awareness of the contribution of businesses to the achievement of the SDGs is one of the reasons for the improvement in the practice of reporting by companies. This research is secondary data‐based accounting research that aims to analyze the quality of reporting on SDGs and whether coercive pressures in the form of regulatory quality, sustainability regulations, and the strength of audit and reporting standards were determinants of the quality of reporting on SDGs in the era of the COVID‐19 pandemic. The results of this study show that, on average, companies reported on 10 of the SDGs (56% of the 17) during the COVID‐19 pandemic. Further, this study found that coercive pressures in the form of regulatory quality, sustainability regulations, and the strength of audit and reporting standards positively affected the quality of reporting at the country and company levels. These results may imply that reporting on SDGs in the pandemic era was defensive reporting that sought to maintain legitimacy and was mainly driven by formal pressures.
Dismantling linear lock‐ins in the Australian AEC industry: A pathway to a circular economy
Authors: Hosseini M. Reza , Memari Sanaz , Martek Igor , Kocaturk Tuba , Bararzadeh Masoomeh , Arashpour Mehrdad 
Published: June 2024

AbstractThe architecture, engineering, and construction (AEC) industry has struggled in its efforts to transition to a circular economy (CE) due to lock‐ins, where the industry remains entrenched in practices that resist this much‐needed transition. The solutions implemented so far have been unsuccessful. This failure can largely be attributed to the prevailing paradigm, which assumes that by sequentially removing barriers transition will naturally follow. However, this assessment overlooks the “lock‐in” effect of practices within the industry's linear model. A comprehensive, holistic “whole of industry” approach is essential to uncover these lock‐ins. In this context, O'Brien's “three transformational spheres framework” is introduced to examine how Australia's AEC sector is deterred from transitioning to a CE by three groups of lock‐ins, and provide viable recommendation to tackle them. Fifteen industry experts were interviewed, covering the three dimensions of the framework. The findings specify three levels of intervention that must be addressed in the industry and recommend an order for tackling them: first, political systems and structures; second, practical behavioral and technical responses; and finally, personal beliefs and values. This article contributes significantly to the field by outlining a comprehensive array of strategies for industry transition. Implementing these strategies in the discussed order has the potential to catalyze the long‐awaited transformation of the industry. This advances the theoretical framework concerning the adoption of a CE within the AEC sector and provides a reliable reference for policymakers, practitioners, and advocates who are orchestrating this transformative journey based on circular principles.