bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mechanical and surface characterisation of additively manufactured polyetheretherketone for the tribo test
Authors: Prajapati Sunil Kumar , R. Gnanamoorthy 
Published: November 2024

Purpose
The additive manufacturing process, such as fused filament fabrication based on material extrusion, fabricates the samples layer-by-layer. The various parameters in the process significantly affect the dimensions, structure and mechanical properties of the fabricated parts. The purpose of this paper is to investigate the surface and mechanical properties that can affect the contact characteristics with other materials during tribological tests.

Design/methodology/approach
The investigation of 3D-printed Polyetheretherketone (PEEK) includes the measurement of dimensions, microhardness, surface roughness, surface energy and tensile strength to define material characteristics. The crystallinity is measured using an X-ray diffractometer to understand the hardness behaviour.

Findings
The printing parameters affect its surface roughness, hardness and crystallinity. This change in parameters such as layer thickness and infill density impacts mechanical properties such as hardness and surface roughness, which will influence the contact mechanism with the counter body during any tribological test. The change in a single parameter during the sample fabrication and the change in the surface and mechanical properties are observed.

Research limitations/implications
The material cost plays an important role in conducting numerous destructive tests, which is a major limitation to conducting parameter optimisation by varying more parameters. The study is limited to the as-fabricated samples rather than finished samples and without any heat treatment. Achieving optimal parameters is integral to the success of additive manufacturing, ensuring the production of components with consistent performance.

Practical implications
The study aims at the application of 3D-printed PEEK for bush or journal bearings that can be directly used in practice. The mechanical properties discussed in this paper can fill the gap between theory and practice.

Social implications
The research provides all fundamental properties, including the printing parameters and their effect on the dimensions and surface structure, which are required to understand the material and its use. The results are consistent as at least four samples were tested for tribological behaviour. The conclusion is updated as per suggestions.

Originality/value
The study outlines the relationship between the change in layer thickness and infill density with changes in surface energy, surface roughness, hardness and tensile strength. The deformation and adhesion during the friction test depend on these properties.
Photoelectric sensor array-based measurement method for the key motion parameters of the small flying object considering non-uniform curve trajectory
Authors: Wang Jia , Sun Haiyang , Chen Ding , Huang Yongjun , Dong Tao , Li Hai , Shen Lingnan , Yang Ziyu 
Published: November 2024

Purpose
The paper aims to accurately measure the key motion parameters, such as velocity, azimuth and pitch angle, of the small flying object with a non-uniform curve trajectory. It proposes a measurement method and its calculation model of non-uniform curve trajectory using a photoelectric sensor array.

Design/methodology/approach
First, the basic composition of the measurement system and mechanism of photoelectric sensor array are described, respectively. Second, a non-uniform curve mathematical measurement model is constructed differently from the traditional linear trajectory, taking into account the influence of gravity and air resistance. Third, the measurement error of the system is analyzed through numerical simulation. Finally, the accuracy and feasibility of the approach are verified by live-ammunition experiments.

Findings
The results show that the systematic error of the hitting point coordinates can be reduced by 9% compared to the traditional linear measurement model. Consequently, this method can meet the higher measurement requirement for the key motion parameters of the small flying object under the non-uniform curve trajectory. Research limitations/implications (if applicable)- although the approach itself is generalizable, the method is unable to detect the motion parameters of multiple small flying objects.

Research limitations/implications
Although the approach itself is generalizable, the method is unable to detect the motion parameters of the multiple small flying objects.

Practical implications
It is evident that the proposed non-uniform curve measurement model is more precise in quantifying the essential characteristics of the small flying object, particularly in consideration of the environmental conditions.

Social implications
The precise measurement of the key motion parameters of the small flying object can facilitate the enhancement of the protective performance of protective materials.

Originality/value
A novel approach to measurement is proposed, which differs from the conventional uniform trajectory model. To this end, the space construction of the photoelectric sensor array is optimized. The number of the sensors is revised.
Sustainability in European luxury tourism companies: an analysis of practices and managerial perspectives
Authors: Romagosa Francesc , Dot Esteve , Mlakar Anja , Gorenak Mitja 
Published: November 2024

Purpose
This paper aims to present findings from a preliminary study aimed at investigating sustainability practices and managerial perceptions within European luxury tourism companies. The study addressed two key research questions: What is the present state of sustainability practices in the luxury tourism sector? What are the managers' perspectives and the prevailing trends in the adoption of sustainable approaches?

Design/methodology/approach
The study used a mixed methods approach to gather data from a diverse range of European luxury tourism companies. The survey and the interview of companies’ representatives encompassed various organisational types engaged in different tourism activities, allowing for a comprehensive exploration of sustainability practices within the sector. Organisational characteristics, such as size, turnover and location, were considered to ensure a representative sample.

Findings
The findings of the study reveal a robust commitment to environmental, social and economic sustainability across the luxury tourism industry. Despite variations in organisational characteristics, including size, turnover and location, the study identified a lack of significant differences in sustainability practices, indicating a noteworthy homogeneity within the sector. The findings also show that a high percentage of companies hold sustainability certifications and share an emphasis on authenticity, local engagement and economic profitability.

Research limitations/implications
The study's sample size may limit the generalisability of the findings. A larger sample size would enhance the study's robustness and allow for more comprehensive insights into sustainability practices within the luxury tourism sector. The study's focus on European luxury tourism companies may limit its applicability to other regions or contexts.

Originality/value
This study contributes to the existing literature by providing insights into sustainability practices and managerial perspectives within the European luxury tourism sector. The study offers original insights into the current state of sustainability in luxury tourism and highlights opportunities for further research and refinement of sustainability initiatives within the sector.
Experimental investigations of the impact of third-generation biodiesel and its blends on diesel fuel filter
Authors: Chib Aaryan , Dugala Navdeep Sharma 
Published: November 2024

Purpose
Biodiesel in engines can reduce net carbon dioxide emissions and boost renewable energy. Despite the benefits of biodiesel engines, little is known about their effects on fuel filters. Filterability hinders the broad use of sustainable biodiesel, as filter clogging and deterioration can lead to engine damage and further hinder the widespread adoption of biodiesel. This study aims to investigate algae biodiesel (Chlorophyta) and diesel fuel filtration and filter deterioration to fill this gap.

Design/methodology/approach
This study investigates the effects of different biodiesel blends on diesel fuel filter parameters, namely, filter blocking tendency (FBT), tensile strength of filter medium upon immersion and other physiochemical properties. In total, 20% biodiesel and 80% diesel (B20) was chosen for its common use as a commercial blend, 40% biodiesel and 60% diesel (B40) for mid-level biodiesel content and 100% biodiesel (B100) for pure biodiesel testing. Testing these concentrations allowed us to determine the effect of increasing biodiesel content. B20 biodiesel emerges as the most suitable blend, providing the best balance of performance and durability with a low FBT (1.0) and a 6.9% increase in tensile strength over diesel. B40 and B100 had higher FBTs of 1.53 and 7.57, respectively, and lower tensile strength, resulting in increased filter clogging and material deterioration. SEM results demonstrated that B20-immersed filters had little structural changes as compared to B40 and B100; the colour darkened noticeably suggesting deposits, including sterol glucosides, indicating material deterioration and clogging.

Findings
The results from current study concluded that when compared to B40 and B100, the B20 biodiesel blend provides the best balance of performance and longevity, with less filter blockage, improved tensile strength and lower maintenance requirements. However, its performance in harsh settings, such as colder climes, high-pressure systems and engines requiring more power output, may require augmentation and more study. While higher blends may be more appropriate in some applications, B20 remains the most adaptable solution for a wide range of general operational situations.

Originality/value
The study concludes that the B20 biodiesel blend provides optimal performance, longevity and maintenance for compression ignition engines, exceeding other blends. While B40 and B100 may be appropriate in certain situations, B20 remains the most practical and versatile option, combining environmental benefits with engine compatibility, making it a superior alternative to standard diesel fuel.
Family therapy and systemic interventions for child‐focussed problems: The evidence base
Authors: Carr Alan 
Published: November 2024

AbstractThis 25th anniversary review updates previous similar papers published in JFT in 2000, 2009, 2014 and 2019. It presents evidence from meta‐analyses and systematic reviews for the effectiveness of systemic interventions for families of young people with common mental and physical health problems and other difficulties where children are the primary focus of concern. In this context, systemic interventions include both family therapy and other family‐based approaches such as parent training, or parent‐implemented interventions. There is now a substantial evidence base supporting the effectiveness of systemic interventions either alone or as part of multimodal programmes for infant mental health and sleep and feeding problems in infancy; recovery from child abuse and neglect; externalising and internalising problems; eating disorders; somatic problems; and psychosis.
Commercial insurers' market power and hospital prices in Medicaid managed care
Authors: Wang Yang , Marr Jeffrey , Xu Jianhui , Meiselbach Mark Katz 
Published: November 2024

AbstractObjectiveTo examine the relationship between insurers' commercial market power and negotiated prices in Medicaid Managed Care (MMC) plans for hospital care.Data SourcesMMC prices from hospital‐disclosed price transparency data as of July 2023 compiled by Turquoise Health, insurance enrollment information from the 2021 Clarivate InterStudy enrollment data.Study DesignLog‐transformed linear regression with hospital and procedure fixed effects estimating the within‐hospital MMC price variation as a function of insurers' commercial market share quartile and MMC market share for 15 common outpatient hospital services.Data Collection/Extraction MethodsA total of 39,049 MMC price samples measured at hospital‐procedure‐MMC insurer level are merged with county‐insurer level market share data.Principal FindingsAround 25% of price variation in MMC plans are driven by within‐hospital factors. Compared with MMC insurers from the lowest commercial market share quartile (<0.8%), those from the highest commercial market share quartile (>17%) are associated with negotiating 4.6% (95% confidence interval: [2.8%–6.4%], p < 0.001) lower MMC prices for outpatient hospital care, including 3.6% (p < 0.05) for medical/surgical procedures, 3.6% (p < 0.01) for radiology, and 6.7% (p < 0.001) for emergency department visits.ConclusionsMMC insurers with substantial commercial market share negotiate lower MMC prices for multiple outpatient hospital services.
Toward environmental sustainability: Is responsible consumption and production of natural resources amid green energy, green technology, and green finance achievable?
Authors: Gu Yan , Chen Junfei , Xi Wenjia , Ridwan Ibrahim Lanre , Al‐Faryan Mamdouh Abdulaziz Saleh 
Published: November 2024

AbstractThe relentless devastating impacts of global warming and other climate change effects leading to incessant ecological damages have compelled governments across the globe to rethink the pattern of natural resource depletion. This has motivated policymakers, governments, international organizations, and research pundits alike to advocate for a transition to sustainable consumption and production of natural resources. Consequently, there is a growing call for sustainable production and consumption practices, as outlined in Sustainable Development Goal 12 (SDG‐12). This research probes how natural resource production and consumption facilitate or hinder environmental sustainability in G7 economies from 1996 to 2020. The empirical evidence incorporates green energy, green technology, green finance, environmental tax, financial development, economic growth, and population as control variables within the STIRPAT theoretical framework. Second‐generation estimating techniques are utilized for empirical verification. An outstanding contribution of this study among others is the estimation of the moderating effects of green energy in mitigating the ensuing impact of natural resources on environmental sustainability. The results indicate that both production and consumption of natural resources, particularly coal and oil negatively affect environmental sustainability. Furthermore, green technology, energy, and finance as well as environmental tax are found to play a crucial role in promoting environmental sustainability. Green technology plays significant part in subduing the deteriorating effects of natural resources on the ecosystem. The robustness analyses further buttress the main analyses. Policy recommendations are proposed based on the empirical results.
Case report: Benign lateral neck ectopic thyroid tissue mimicking cervical lymph node metastasis
Authors: Ng Wang‐Lin , Chan Man‐Hin , Wong Ka‐Chun 
Published: November 2024

AbstractWe herein report a rare case of benign lateral neck ectopic thyroid tissue that presentation micmicked cerivcal lymph node metastasis of follicular thyroid cancer and discuss its management pearl.
De novo biosynthesis and nicotinamide biotransformation of nicotinamide mononucleotide by engineered yeast cells
Authors: Ren Yanna , Han Bei , Wang Shijie , Wang Xingbin , Liu Qi , Cai Menghao 
Published: November 2024

Abstractβ‐Nicotinamide mononucleotide (NMN) is a precursor of NAD+ in mammals. Research on NAD+ has demonstrated its crucial role against aging and disease. Here two technical paths were established for the efficient synthesis of NMN in the yeast Pichia pastoris, enabling the production of NMN from the low‐cost nicotinamide (NAM) or basic carbon sources. The yeast host was systematically modified to adapt to the biosynthesis and accumulation of NMN. To improve the semi‐biosynthesis of NMN from NAM, nicotinamide phosphoribosyltransferases were expressed intracellular to evaluate their catalytic activities. The accumulation of extracellular NMN was further increased by the co‐expression of an NMN transporter. Fine‐tuning of gene expression level produced 72.1 mg/L NMN from NAM in flasks. To achieve de novo biosynthesis NMN, a heterologous biosynthetic pathway was reassembled in yeast cells. Fine‐tuning of pathway nodes by the modification of gene expression level and enhancement of precursor generation allowed efficient NMN synthesis from glucose (36.9 mg/L) or ethanol (57.8 mg/L) in flask. Lastly, cultivations in a bioreactor in fed‐batch mode achieved an NMN titre of 1004.6 mg/L at 165 h from 2 g NAM and 868 g glucose and 980.4 mg/L at 91 h from 160 g glucose and 557 g ethanol respectively. This study provides a foundation for future optimization of NMN biosynthesis by engineered yeast cell factories.
Rheumatic manifestations and sequela of acute parvovirus B19 infection in hospitalized adult population
Authors: Hassan Fadi , Khoury Wasim , Daood Rula , Saab Amir , Naffaa Mohammad E. , Jeries Helana 
Published: November 2024

AbstractBackgroundParvovirus B19 infection has been associated with various clinical entities including musculoskeletal manifestations and the development of different autoimmune diseases. The aim of our study is to examine the musculoskeletal manifestations associated with acute parvovirus B19 infection and the possible development of chronic autoimmune rheumatic diseases.Patients and MethodsRetrospective cohort study that included adult hospitalized patients diagnosed with an acute parvovirus B19 infection between 1 January 2021 and 1 February 2024. Subjects were followed‐up for 6–12 months after hospitalization aiming to identify patients who developed chronic autoimmune rheumatic diseases.ResultsThe study included 23 patients diagnosed with acute parvovirus B19 infection. Patients were predominantly females (16, 69.6%) with mean age at diagnosis of 39.3 ± 13.11 years. Most patients were Jewish (15, 65.2%). The two most common acute symptoms were fever (82.6%) and myalgia (56.5%). Polyarthritis was present only in three patients (13%) and all of them had wrists involvement. Anti‐nuclear antibodies and rheumatoid factor were the most common autoantibodies present with equal prevalence each (13%). Five patients were treated with prednisone during the acute phase (21%), two (8.7%) of them needed drug escalation and were subsequently treated with hydroxychloroquine and methotrexate. One patient developed systemic lupus erythematosus during the first 6 months of follow‐up.ConclusionMusculoskeletal manifestations developing during acute parvovirus B19 are usually self‐limited with only a small minority of patients developing chronic autoimmune diseases. It is crucial to differentiate self‐limited manifestations related to acute parvovirus B19 from idiopathic autoimmune diseases aiming to avoid unnecessary immunosuppressive therapy.
Recovery of clinically relevant multidrug‐resistant Klebsiella pneumoniae lineages from wastewater in Kumasi Metropolis, Ghana
Authors: Ekhosuehi Amen , Ikhimiukor Odion O. , Essandoh Helen Michelle Korkor , Asiedu Nana Yaw , Aighewi Isoken Tito , Sunmonu Gabriel Temitope , Odih Erkison Ewomazino , Oaikhena Anderson O. , Cyril‐Okoh Dorothy , Yeboah Clara , Okeke Iruka N. 
Published: November 2024

AbstractAntimicrobial resistance (AMR) is under‐monitored in Africa, with few reports characterizing resistant bacteria from the environment. This study examined physicochemical parameters, chemical contaminants and antibiotic‐resistant bacteria in waste stabilization pond effluents, hospital wastewater and domestic wastewater from four sewerage sites in Kumasi. The bacteria isolates were sequenced. Three sites exceeded national guidelines for total suspended solids, biochemical oxygen demand, chemical oxygen demand and electrical conductivity. Although sulfamethoxazole levels were low, the antibiotic was detected at all sites. Multi‐drug‐resistant Klebsiella pneumoniae and Pseudomonas aeruginosa were isolated with multi‐locus sequence typing identifying K. pneumoniae strains as ST18 and ST147, and P. aeruginosa as ST235, all of clinical relevance. A comparison of ST147 genomes with isolates from human infections in Africa showed remarkable similarity and shared AMR profiles. Thirteen of the twenty‐one plasmids from ST147 harbored at least one AMR gene, including blaCTX‐M‐15 linked to copper‐resistance genes. Our study demonstrated high bacterial counts and organic matter in the analysed wastewater. The recovery of clinically significant isolates with multiple antibiotic and heavy metal resistance genes from the wastewater samples raises public health concerns.
Recovery of culturable Streptococcus pyogenes from swabs stored at different temperatures
Authors: Summer Kate , Tong Steven Y. C. , Carapetis Jonathan R. , Bowen Asha C. 
Published: November 2024

AbstractImproving our understanding of superficial Streptococcus pyogenes (Strep A) carriage and transmission necessitates robust sampling methods. Here, we compared the effect of storing swab samples in fridge (+4°C) and freezer (−20°C) conditions on the recovery of laboratory‐cultured S. pyogenes. Streptococcus pyogenes colony‐forming units progressively declined at +4°C, but not at −20°C, over 2 weeks. Results demonstrate that freezing is preferable over refrigeration for storage and transport of skin and throat swabs to ensure that culturing accurately reflects the true results of sampling. This is particularly important in remote community research and practice when immediate incubation is not possible or batch processing is most practical, increasing the elapsed time between collection and laboratory analysis. The study suggests that temperature negatively affects S. pyogenes viability and provides a method to further investigate the role of other environmental factors affecting S. pyogenes transmission.
Clinicopathological features and prognosis of mucinous breast carcinoma with a micropapillary structure
Authors: Yang Beibei , Shen Menglu , Sun Bo , Zhao Jing , Wang Meng 
Published: November 2024

AbstractObjectiveTo conduct a comparative analysis of clinicopathological data between mucinous micropapillary breast carcinoma (MUMPC) and pure mucinous carcinoma (PMC) without a micropapillary structure to elucidate the distinctive clinicopathological characteristics of MUMPC and their impact on prognosis.MethodsThis retrospective analysis included 325 patients diagnosed with mammary mucinous carcinoma admitted to Tianjin Cancer Hospital between July 2014 and December 2019, including 197 patients with MUMPC and 128 patients with PMC without a micropapillary structure. Clinicopathological features were compared, and factors influencing the prognosis of MUMPC were analyzed. Survival analysis was conducted using the Kaplan–Meier method, and univariate and multivariate prognostic analyses for MUMPC were performed using the Cox proportional hazard regression model.ResultsThe median follow‐up period was 76 months. In the MUMPC and PMC groups, the disease‐free survival (DFS) rates at 3, 5, and 7 years were 95.4%, 90.4%, 89.8%, and 100%, 98.4%, and 96.9%, respectively, with a statistically significant difference between the two groups (p = 0.009). Tumor, node, and metastasis (TNM) stage, lymph node metastasis, and endocrine treatment were significant factors influencing the prognosis of the MUMPC group (p < 0.001). Multivariate analysis revealed that lymph node metastasis and endocrine therapy were independent prognostic factors in patients with MUMPC (p < 0.001). Compared with PMC, the MUMPC group exhibited a higher prevalence of HER2 (11.2% vs. 3.1%, p = 0.009) and Ki‐67 overexpression (79.7% vs. 60.2%, p < 0.001).ConclusionThe lymph node stage is the most crucial clinicopathological feature of MUMPC. Endocrine treatment strategy is an independent risk factor affecting the prognosis of MUMPC.