bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of the base flow of a generic space launcher with dual-bell nozzle
Authors: Scharnowski Sven , Kähler Christian J. 
Published: September 2020

AbstractThe typical afterbody flow of a space launcher is characterized by a strong interaction of the engine’s exhaust jet and the separated shear layer emerging from the main body. This interaction is further complicated by strong changes in the spatial and temporal behavior of the afterbody flow during the atmospheric ascent of a launcher. Theoretically, a dual-bell nozzle not only allows for a gain in payload compared to standard single-bell nozzles, but also it alters the wake flow topology due to the two nozzle modes. To predict the benefits as well as the additional risks, the afterbody flow of a generic space launcher model equipped with a cold-flow dual-bell nozzle is investigated in detail. The flow was analyzed for sub-, trans- and supersonic Mach numbers ranging from 0.3 to 2.9 for a variety of nozzle pressure ratios. Particle image velocimetry measurements and schlieren measurements with high repetition rate were performed to determine the dynamics of the separated shear layer, the nozzle jet and their interaction. It is shown that the reattachment length of the base flow decreases with increasing nozzle pressure ratio. Furthermore, the nozzle pressure ratio at which the dual-bell nozzle switches from sea-level mode to altitude mode is reduced by $$15\%$$

15
%

with high subsonic outer flow and by as much as $$65\%$$

65
%

for an outer flow at a Mach number of 1.6. Even for a constant nozzle pressure ratio, the nozzle flow topology depends on the Mach number of the outer flow.
Assessment of groundwater potentiality using geospatial techniques in Purba Bardhaman district, West Bengal
Authors: Pal Subodh Chandra , Ghosh Chiranjit , Chowdhuri Indrajit 
Published: September 2020

AbstractThe word water is life, so life on this planet cannot be possible without water. Water is an essential natural resource that is a surface and groundwater device for human society. The purpose of this research is to assess the groundwater potentiality of the Purba Bardhaman district. All data (primary and secondary) are collected from different sources and analyzed in geographic information system (GIS) software to prepare thematic maps. Different geo-environmental factors like as land use and land cover, soil, lithology, rainfall and distance from the river, etc., can impact on groundwater availability directly or indirectly in Purba Bardhaman area. To identify groundwater potential zones, all these factors are composed into GIS software using multi-criteria decision analysis (MCDA) method. The groundwater potential map has been divided into five classes based on their magnitude as very high, high, medium, low and very low groundwater potential zones. It shows that the areas of very low, low, medium, high and very high groundwater potential zones are 21.54%, 35.80%, 26.47%, 10.13%, 6.06%, respectively, of the total area. Finally, validation is carried out using groundwater depth data collected from 44 drilled tube wells which are located in a scattered manner for whole Purba Bardhaman district which indicates a higher similarity with an area under curve value of 86.8%.
Experimental study and performance comparison on various types of rectangular piano key side weirs at a 120° section of a 180° curved channel
Authors: Mehri Yaser , Esmaeili Solmaz , Soltani Jaber 
Published: September 2020

AbstractApplication of side weirs with high effective length is necessary to discharge excessive flows, to control the flow in water conveyance systems, and irrigation and drainage systems. Most of the studies on the side weirs have been conducted on the straight channels and linear weirs. The flow pattern on the outer arc of the curved channels and its suitability for side weir can be used and combined with the piano key weirs. So far, no comparison has been made on rectangular piano key side weirs (RPKSW) at a 120° Section of a 180° Curved Channel. In this study, an experimental study was performed on A-, B-, C-, and D-type RPKSW at a bend angle of 120 degrees. The results showed that the specific energy at two ends of the RPKSWs was the same, with a slight difference of 3.4% for A-Type, 1.3% for B-Type, 1.1% for C-Type, and 1.8% for D-Type weirs. The discharge coefficients of the studied weirs were also investigated, and it was concluded that B-Type weir has better performance than other weirs. On average, the discharge coefficient of B-Type weir was 9.9%, 21.2%, and 24.1% higher than that of A-Type, C-Type, and D-Type weir, respectively. It was shown that the ratio of P/h1 is the main parameter affecting the weir discharge coefficient. Finally, an empirical equation was proposed for each weir. The proposed equation has MAE = 0.028 for A-Type weir, MAE = 0.041 for B-Type weir, MAE = 0.049 for C-Type weir, and MAE = 0.053 for D-Type weir.
A novel ‘practical body image’ therapy for adolescent inpatients with anorexia nervosa: a randomised controlled trial
Authors: Biney Hannah , Astbury Sarah , Haines Amanda , Grant Jessica , Malone Nicola , Hutt Matt , Matthews Rachel , Morgan John F. , White Sarah , Lacey J. Hubert 
Published: September 2020

AbstractPurposeTo determine the potential effectiveness of a novel 10-week manualised Practical Body Image therapy (PBI) with mirror exposure (ME), when used as an adjuvant to an intensive treatment package (TAU) in adolescent inpatients with Anorexia Nervosa (AN). To evaluate the effectiveness of ME in an adolescent population.MethodsUsing a randomised control design, 40 girls aged 11–17 years with AN were assigned to PBI with TAU (n = 20) and TAU alone (n = 20). Both groups completed self-report measures of body image at week 1 and week 10 of the study to measure the potential effectiveness of PBI. The PBI group completed measures at week 7 to evaluate the ME component.Results31 participants completed the study; 16 TAU, 15 PBI. PBI participants had greater improvement in all outcomes than TAU participants. Medium effect sizes were seen for self-reported weight concern, body image avoidance in terms of clothing and body image anxiety. ME produced effect sizes in self-reported body image avoidance in terms of clothing and grooming that were greater than 0.40,n = 14.ConclusionThe findings demonstrate that PBI supports an intensive inpatient treatment package and addresses elements of negative body image. PBI was beneficial for addressing body image dissatisfaction with improvements in weight concerns, body image avoidance and physical appearance trait anxiety following the ME component. The magnitude of the effect sizes is comparable to previous studies. Positive qualitative feedback indicated the intervention was acceptable to users. PBI is a promising new adjuvant treatment for AN.EMB RatingLevel I: randomized controlled trial.
Random dynamic analysis of vertical train–bridge systems under small probability by surrogate model and subset simulation with splitting
Authors: Xiang Huoyue , Tang Ping , Zhang Yuan , Li Yongle 
Published: September 2020

AbstractThe response of the train–bridge system has an obvious random behavior. A high traffic density and a long maintenance period of a track will result in a substantial increase in the number of trains running on a bridge, and there is small likelihood that the maximum responses of the train and bridge happen in the total maintenance period of the track. Firstly, the coupling model of train–bridge systems is reviewed. Then, an ensemble method is presented, which can estimate the small probabilities of a dynamic system with stochastic excitations. The main idea of the ensemble method is to use the NARX (nonlinear autoregressive with exogenous input) model to replace the physical model and apply subset simulation with splitting to obtain the extreme distribution. Finally, the efficiency of the suggested method is compared with the direct Monte Carlo simulation method, and the probability exceedance of train responses under the vertical track irregularity is discussed. The results show that when the small probability of train responses under vertical track irregularity is estimated, the ensemble method can reduce both the calculation time of a single sample and the required number of samples.
Quantitative analysis on coupling of traction current into cab signaling in electrified railways
Authors: Liu Chang , Yang Shiwu , Cui Yong , Lv Jiaqi 
Published: September 2020

AbstractCab signaling apparatus is the critical equipment for ground-vehicle communication in electrified railways. With the rapid development of high-speed and heavy-haul railways, the immunity to unbalanced traction current interference for cab signaling apparatus in the onboard train control system is increasingly demanded. This paper analyzes the interference coupling mechanism of the ZPW-2000 track circuit. Based on electromagnetic field theory and the actual working parameters, a calculation model is established to complete the quantitative research of the cab signal induction process and traction current interference. Then, a finite element model is built to simulate the process. The simulation results under the signal frequency, fundamental and harmonic interference are all consistent with the theoretical calculation results. The practical measurement data verify the coupling relationship between cab signal inductive voltage and rail current. Finally, an indirect immunity test method applying this relation for the cab signals is proposed, and the voltage indexes of the disturbance sources are determined, i.e., the test limits. The results provide an accurate quantitative basis for the cab signaling research and design of the immunity test platform; besides, the proposed indirect test method can simplify the test configuration and improve test efficiency.
Grand challenges for Smoothed Particle Hydrodynamics numerical schemes
Authors: Vacondio Renato , Altomare Corrado , De Leffe Matthieu , Hu Xiangyu , Le Touzé David , Lind Steven , Marongiu Jean-Christophe , Marrone Salvatore , Rogers Benedict D. , Souto-Iglesias Antonio 
Published: September 2020

AbstractThis paper presents a brief review of grand challenges of Smoothed Particle Hydrodynamics (SPH) method. As a meshless method, SPH can simulate a large range of applications from astrophysics to free-surface flows, to complex mixing problems in industry and has had notable successes. As a young computational method, the SPH method still requires development to address important elements which prevent more widespread use. This effort has been led by members of the SPH rEsearch and engineeRing International Community (SPHERIC) who have identified SPH Grand Challenges. The SPHERIC SPH Grand Challenges (GCs) have been grouped into 5 categories: (GC1) convergence, consistency and stability, (GC2) boundary conditions, (GC3) adaptivity, (GC4) coupling to other models, and (GC5) applicability to industry. The SPH Grand Challenges have been formulated to focus the attention and activities of researchers, developers, and users around the world. The status of each SPH Grand Challenge is presented in this paper with a discussion on the areas for future development.
Alterations of gut microbiota composition in post-finasteride patients: a pilot study
Authors: Borgo F. , Macandog A. D. , Diviccaro S. , Falvo E. , Giatti S. , Cavaletti G. , Melcangi R. C. 
Published: September 2020

Abstract
Purpose
Post-finasteride syndrome (PFS) has been reported in a subset of patients treated with finasteride (an inhibitor of the enzyme 5alpha-reductase) for androgenetic alopecia. These patients showed, despite the suspension of the treatment, a variety of persistent symptoms, like sexual dysfunction and cognitive and psychological disorders, including depression. A growing body of literature highlights the relevance of the gut microbiota-brain axis in human health and disease. For instance, alterations in gut microbiota composition have been reported in patients with major depressive disorder. Therefore, we have here analyzed the gut microbiota composition in PFS patients in comparison with a healthy cohort.

Methods
Fecal microbiota of 23 PFS patients was analyzed by 16S rRNA gene sequencing and compared with that reported in ten healthy male subjects.

Results
Sexual dysfunction, psychological and cognitive complaints, muscular problems, and physical alterations symptoms were reported in more than half of the PFS patients at the moment of sample collection. The quality sequence check revealed a low library depth for two fecal samples. Therefore, the gut microbiota analyses were conducted on 21 patients. The α-diversity was significantly lower in PFS group, showing a reduction of richness and diversity of gut microbiota structure. Moreover, when visualizing β-diversity, a clustering effect was found in the gut microbiota of a subset of PFS subjects, which was also characterized by a reduction in Faecalibacterium spp. and Ruminococcaceae UCG-005, while Alloprevotella and Odoribacter spp were increased compared to healthy control.

Conclusion
Gut microbiota population is altered in PFS patients, suggesting that it might represent a diagnostic marker and a possible therapeutic target for this syndrome.
Nanohollow Carbon for Rechargeable Batteries: Ongoing Progresses and Challenges
Authors: Jiang Jiangmin , Nie Guangdi , Nie Ping , Li Zhiwei , Pan Zhenghui , Kou Zongkui , Dou Hui , Zhang Xiaogang , Wang John 
Published: September 2020

AbstractAmong the various morphologies of carbon-based materials, hollow carbon nanostructures are of particular interest for energy storage. They have been widely investigated as electrode materials in different types of rechargeable batteries, owing to their high surface areas in association with the high surface-to-volume ratios, controllable pores and pore size distribution, high electrical conductivity, and excellent chemical and mechanical stability, which are beneficial for providing active sites, accelerating electrons/ions transfer, interacting with electrolytes, and giving rise to high specific capacity, rate capability, cycling ability, and overall electrochemical performance. In this overview, we look into the ongoing progresses that are being made with the nanohollow carbon materials, including nanospheres, nanopolyhedrons, and nanofibers, in relation to their applications in the main types of rechargeable batteries. The design and synthesis strategies for them and their electrochemical performance in rechargeable batteries, including lithium-ion batteries, sodium-ion batteries, potassium-ion batteries, and lithium–sulfur batteries are comprehensively reviewed and discussed, together with the challenges being faced and perspectives for them.
Covid-19: food insecurity, digital exclusion and Catholic schools
Authors: McKinney Stephen J. 
Published: September 2020

AbstractCovid-19 and the subsequent worldwide lockdowns have had a major impact on families and school education. The lockdowns have highlighted and exacerbated the disadvantages experienced by those children who suffer from child poverty. This article focuses on food insecurity and the digital divide, or digital exclusion, and argues that these have emerged as very pressing issues during lockdowns for children suffering from child poverty. The article provides an outline of the response of the Catholic Church and Catholic schools, primarily in the United Kingdom. There have been some concerted efforts to address food insecurity by providing food and food vouchers for children and vulnerable families. It has proved more problematic to address digital exclusion and the article argues that for those children who experience digital exclusion, this can effectively mean exclusion from the religious education, religious life, community and the pastoral and spiritual support that is normally offered by the Catholic school.
‘Neutrality’, Muslimness and the whiteness of RE professionalism
Authors: Vince Matthew 
Published: September 2020

AbstractThere has been longstanding criticism of the whiteness of the professional discourses in teaching. Bariso (Race Ethn Educ 4(2):167–184,10.1080/713693054, 2001) writes that where whiteness is constructed as being professional then blackness is constructed as unprofessional, in turn excluding blackness from the construction of the teacher. Similarly, Bhopal (Br J Educ Stud, 63(2):197–211,10.1080/00071005.2015.1005045, 2015) argues that this presents a clash between embodying blackness and embodying the teacher. With the turn to research surrounding Muslim teachers, attributes of Muslimness have also been shown to be a source of marginalisation within school contexts (Shah in Education, leadership and Islam: theories, discourses and practices from an Islamic perspective, Routledge, London, 2016). Some scholarship has reflected on issues surrounding embodiment and ‘body-works’ of RE teaching’s professional discourses (Bryan and Revell in Br J Educ Stud 59(4):403–419,10.1080/00071005.2011.602328, 2011; Everington in Br J Religious Educ 36(2):155–173,10.1080/01416200.2013.820169, 2014; Vince in J Beliefs Values,10.1080/13617672.2019.1686732019, 2019). Such empirical studies have shown that embodying faith is perceived to be at odds with notions of RE teacher professionalism, particularly around notions of ‘neutrality’ (Everington in Br J Relig Educ, 38(2):177–188,10.1080/01416200.2016.1139892, 2016). Despite the concept of ‘neutrality’ being increasingly criticised (Franken and Loobuyck in Br J Relig Educ, 39(1):1–6,10.1080/01416200.2016.1218219, 2017), embodying ‘neutrality’ remains an important commitment. This has clear implications for (hyper)visible religious bodies (Jeldtoft, in: Dessing et al. (eds) Everyday Lived Islam in Europe, Routledge, London, 2016). Accordingly, in this paper I explore how ‘Muslim RE teachers’ manage their identities in relation to ‘being neutral’. For these teachers, ‘becoming neutral’ was the formative part of becoming an RE teacher. However, this was particularly challenging due to the hypervisibility of their Muslimness, particularly for female Muslim teachers. These challenges are then framed as an issue of whiteness, disproportionally affecting those who do not fit the white teacher norm. I end on arguing that there is a pressing need to change how ‘neutrality’ is understood.
Ethics education in Maltese public schools: a response to otherness or a contribution to Othering?
Authors: Mizzi Bernardette , Mercieca Duncan P. 
Published: September 2020

AbstractThis paper reflects on the establishment of an Ethics Education Programme for school pupils aged between five and sixteen years who opt out of Catholic Religious Education in Malta. It needs to be seen in the light of the changing demography of Malta and the increasing secularisation of the country, as well as to the growing racism, islamophobia and rejection of the Other to be found all over Europe (and of course beyond). We question if the Ethics Education Programme, in its commitment to ‘totalising’ western ideals of rationality, autonomy, and universal values, is itself rooted in discomfort with the Other and constitutes a form of ethical violence. The work of Emmanuel Levinas on Otherness, sameness and violence is central to this paper.
Past pandemics and climate variability across the Mediterranean
Authors: Luterbacher J. , Newfield T. P. , Xoplaki E. , Nowatzki E. , Luther N. , Zhang M. , Khelifi N. 
Published: September 2020

AbstractThe influence that meteorological, climatological and environmental factors had on historical disease outbreaks is often speculated upon, but little investigated. Here, we explore potential associations between pandemic disease and climate over the last 2,500 years in Mediterranean history, focusing on ancient disease outbreaks and the Justinianic plague in particular. We underscore variation in the quality, quantity and interpretation of written evidence and proxy information from natural archives, the comlexity of identifying and disentangling past climatological and environmental drivers, and the need to integrate diverse methodologies to discern past climate-disease linkages and leverage historical experiences to prepare for the rapid expansion of novel pathogenic diseases. Although the difficulties entailed in establishing historical climate-pandemic linkages persist to the present, this is a research area as urgent as it is complex and historical perspectives are desperately needed.
The effects of automation of a patient-centric service in primary care on the work engagement and exhaustion of nurses
Authors: Cajander Åsa , Larusdottir Marta , Hedström Gustaf 
Published: September 2020

AbstractDigitalising patient-centric services to address society’s challenges with an ageing population and healthcare provision is by many seen as important. Studying the effects of the digitalisation on the work engagement of the users of the new systems is vital in this context, especially since previous research has established that the work engagement at work in healthcare is problematic. Work engagement is defined as a positive, fulfilling, affective-motivational state of work related well being, as is closely connected to the experience of resources and demands in the work context. These resources can be for example digital support, experienced demands or empowerment whereas exhaustion is connected to work demand in a workplace. This study contributes to knowledge about the effects of digitalisation on work engagement and exhaustion in the context of patient-centred services and eHealth. Contextual interviews were conducted on site for 5 h with nurses using a new chat function and using telephone for medical advice to patients. Additionally, semi-structured interviews were conducted with all the nurses participating in this digitalisation project to gather more insights into their work engagement in the two work situations. Results were analysed in different themes of areas affected by the digitalisation in the two overarching themes: job demands and job resources. The results show that the change to a chat function when communicating with advice seekers had connection to work engagement in several ways. The nurses experienced less time pressure and emotional pressure, but also a loss of job control and feedback from colleagues working from home.
Radiofrequency for benign and malign thyroid lesions
Authors: Rangel Leonardo , Volpi Leonardo M. , Stabenow Elaine , Steck Jose Higino , Volpi Erivelto , Russell Jonathon O. , Tufano Ralph P. 
Published: September 2020

BackgroundThermal ablation of thyroid nodules is new modality for the management of the benign and malign lesions. This minimally invasive treatment is performed as an outpatient, local anesthetic, single professional procedure that can treat neoplastic lesions without removing normal thyroid tissue and thus avoiding hypothyroidism.MethodA comprehensive review of the most relevant literature regarding the thermal ablation of benign and malign nodules was performed in order to currently define its role on the management of the nodular thyroid disease. The data was divided into benign and malign literature.ResultsThe benign nodules can be effectively treated by radiofrequency ablation (RFA) but some limitation exists regarding the nodule's size but not nodules characteristics. The RFA of primary malign tumors of the thyroid recently demonstrated positive and safe long‐term follow‐up and encouraged additional investigation and possibly a definitive role in the management of these low risk nodules.ConclusionRFA is a safe, cost‐effective minimally invasive procedure that avoids thyroid tissue removal while destroying neoplastic one thus, preventing hypothyroidism.