bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ranked set sampling on estimation of P[Y<X] for inverse Weibull distribution and its applications
Authors: Hassan Marwa Kh. 
Published: September 2021

PurposeDistribution. The purpose of this study is to obtain the modified maximum likelihood estimator of stress–strength model using the ranked set sampling, to obtain the asymptotic and bootstrap confidence interval ofP[Y < X], to compare the performance of author’s estimates with the estimates under simple random sampling and to apply author’s estimates on head and neck cancer.Design/methodology/approachThe maximum likelihood estimator ofR = P[Y < X], whereXandYare two independent inverse Weibull random variables common shape parameter that affect the shape of the distribution, and different scale parameters that have an effect on the distribution dispersion are given under ranked set sampling. Together with the asymptotic and bootstrap confidence interval, Monte Carlo simulation shows that this estimator performs better than the estimator under simple random sampling. Also, the asymptotic and bootstrap confidence interval under ranked set sampling is better than these interval estimators under simple random sampling. The application to head and neck cancer disease data shows that the estimator ofR = P[Y < X] that shows the treatment with radiotherapy is more efficient than the treatment with a combined radiotherapy and chemotherapy under ranked set sampling that is better than these estimators under simple random sampling.FindingsThe ranked set sampling is more effective than the simple random sampling for the inference of stress-strength model based on inverse Weibull distribution.Originality/valueThis study sheds light on the author’s estimates on head and neck cancer.
Craft breweries’ environmental proactivity: an upper echelons perspective
Authors: Sozen Erol , Rahman Imran , O’Neill Martin 
Published: September 2021

PurposeCentered on upper echelons theory, this study aims to examine the interplay of US craft brewery owners’ green consumption values, environmental attitudes and environmental proactivity of their craft breweries. In addition, the moderating role of business challenges on the effect of environmental attitudes on environmental proactivity is assessed.Design/methodology/approachAn online questionnaire was distributed to a convenience sample of US craft brewers through the Brewers Association Brew Forum Blog. A total of 237 valid responses were received. Structural equation modeling was used for testing hypothetical relationships among key constructs in the proposed research model: environmental values, environmental involvement, environmental sustainability practices and business challenges.FindingsThe results showed that green consumption values positively and significantly influenced environmental attitudes and environmental proactivity. Findings also confirmed the significant positive influence of environmental attitude on environmental proactivity. Furthermore, business challenges moderated the relationship between owners’ environmental attitudes and environmental proactivity of the breweries such that the higher the extent of business challenges weaker is the relationship between environmental attitudes and environmental proactivity.Originality/valueIt is accepted that upper management’s individual beliefs surrounding environmentalism are a contributing factor to the environmental management policy of their company. However, there is very little empirical evidence to demonstrate the impact that these values have in a tangible sense. To satisfy this deficit in the research, the study aims to analyze the relationship between the brewery owners’ environmental outlook and the sustainability practices of their brewery, regarding the former as a key psychological characteristic, which influences and motivates the direction of the latter.
Approved to fail: a case study of leadership at three new high schools
Authors: Bridich Sarah Melvoin 
Published: September 2021

PurposeThis paper explores how leaders of new public high schools – one charter and two innovation schools – navigated the journey from school-in-theory to school-in-practice during the school's first three years. School leaders at charter and innovation schools have increased freedom over curriculum, budget, scheduling and personnel when compared to leaders in traditional public schools.Design/methodology/approachUsing case study research, this qualitative, multisite study of school leaders at three schools in an urban district in Colorado examined the realities leaders experienced during the first three years of their schools. School leaders participated in semi-structured interviews, which were coded and analyzed for data individual to each school and across the three schools. Initial school design plans and district accountability data were also reviewed.FindingsThe study identified two distinct challenges for leaders of these new schools: (1) opening a new school contributes to burnout among school leaders and (2) school leaders face systemic, district-level barriers that impede implementation of a school's founding mission and vision.Research limitations/implicationsA qualitative study of three standalone charter and innovation schools in one urban school district limits generalizability.Originality/valueThe lived experience of school leaders at new, standalone charter and innovation schools is largely neglected in empirical studies. This research illuminates key struggles school leaders experience as they seek to establish new schools with fidelity to district-approved school plans.
Non-reactive test rig for combustor-turbine interaction studies in industrial gas turbines
Authors: Fiorineschi Lorenzo , Bacci Tommaso , Frillici Francesco Saverio Saverio , Cubeda Simone , Volpe Yary , Rotini Federico , Carfagni Monica , Facchini Bruno 
Published: September 2021

Purpose
This paper aims to present the design of a particular non-reactive test rig for combustion swirlers and first stage turbine nozzles. The test rig is required for important experimental activities aimed at the optimization of a specific class of gas turbines.

Design/methodology/approach
A multi-disciplinary team performed the design process by following a tailored design approach, which has been developed for the specific case. The design outcomes allowed to build a fully functional test rig to be introduced in a test cell and then to perform preliminary experiments about the fluid dynamic behaviour of the turbine elements.

Findings
The followed design approach allowed to efficiently perform the task, by supporting the information exchange among the different subjects involved in both the conceptual and the embodiment design of the test rig. Additionally, the performed experiments allowed to achieve a final configuration that makes the test rig a valuable test case for combustor-turbine interaction studies.

Research limitations/implications
The study described in this paper is focused on the design of a specific test rig, used for first validation tests. However, the achieved results (both in terms of design and test) constitutes the underpinning of the in-depth investigations to be performed in the next steps of the experimental campaign.

Originality/value
To the best of the authors’ knowledge, the present paper is the first one that comprehensively describes the design activity of an experimental test rig for turbine application, also providing indications about the specific methodological procedure used to manage the process.
Copula methods for evaluating relative tail forecasting performance
Authors: León Ángel , Ñíguez Trino-Manuel 
Published: September 2021

PurposeThe authors apply their method to analyze which portfolios are capable of providing superior performance to those based on the Sharpe ratio (SR).Design/methodology/approachIn this paper the authors illustrate the use of conditional copulas for identifying differences in alternative portfolio performance strategies. The authors analyze which portfolios are capable of providing superior performance to those based on the SR.FindingsThe results show that under the Gaussian copula, both expected tail ratio (ETR) and skewness-kurtosis ratio portfolios exhibit remarkably low correlations respecting the SR portfolio. This means that these two portfolios are different respecting the SR one. The authors also find that copulas which focus on either the upper tail (Gumbel) or the lower tail (Clayton) render significant differences. In short, the copula analysis is useful to understand what kind of equity-screening strategy based on its corresponding performance measure (PM) performs better in relation to the SR portfolio.Practical implicationsCopula methods for evaluating relative tail forecasting performance provide an alternative tool when forecast differences are very small or found non statistically significant through standard tests.Originality/valueOur copula methods to evaluate models' performance differences are significant because when models' performance is rather similar, conclusions on statistical differences, can be defective as they may hinge on the subsample type or size used, leading to inefficient investment decisions. Our method based in copula is novel in this research topic.
Accounting at your service: university survival, recovery and revolution from COVID-19
Authors: Ng Frederick 
Published: September 2021

Purpose
The purpose of this paper is to discuss the roles of accounting for university survival, recovery and revolution from the COVID-19 pandemic. It constructively critiques the use of compliance and cost-centric accounting to inform crisis response and proposes roles for accounting to better serve decision-making in a crisis.

Design/methodology/approach
This paper discusses limitations about how accounting information was used in a university’s response to the COVID-19 pandemic. This paper describes potential roles for accounting across crisis phases. These proposals recognise requirements arising from the university’s regulatory environment and apply concepts from intellectual capital accounting and service-dominant logic.

Findings
This paper proposes that in the survival phase, accounting can mitigate rash responses by clarifying the crisis’s impact and stakeholder alignment. In the recovery phase, accounting can inform resourcing decisions by balancing signals from accounting about staff expense and capital investment. In the revolution phase, accounting helps develop the business models needed to adapt to changing student needs, hybrid teaching delivery and importance of intellectual capital.

Research limitations/implications
The case study discusses the early stages of a university’s response to the COVID-19 pandemic. It does not provide a comprehensive analysis of success or failure of accounting in a crisis. The case raises directions for accounting to clarify the ambiguities in objectives and cause-and-effect relationships from the pandemic.

Practical implications
This paper proposes actions for accounting to support the survival, recovery and revolution of the university sector from the pandemic. The actions cover stakeholder engagement, university sector governance and strategic planning.

Originality/value
This paper proposes a lifecycle of accounting roles at different stages of the COVID-19 response that reflects requirements from the university’s regulatory environment and draws on intellectual capital and service-dominant logic literature.
Investigation the influence of miniaturized RFID tag sensor on coupling effect
Authors: Wang Peng , Dong Lihong , Wang Haidou , Li Guolu , Di Yuelan , Xie Xiangyu , Huang Dong 
Published: September 2021

Purpose
The skin and skeleton of aircraft are connected by adhesives or rivets to bear and transfer aerodynamic load. It is easy for crack and fracture damage to occur under the action of cyclic load, thus reducing aircraft bearing capacity/integrity and causing serious security risks. Therefore, it is particularly important that passive wireless radio frequency identification (RFID) sensors be used for the health monitoring of aircraft skin in its whole life cycle. This paper aims to investigate the influence of miniaturization on the coupling effect between RFID tag sensors.

Design/methodology/approach
Two groups of crack sensing systems based on RFID tags were designed. Gain and mutual impedance of sensor tags were analyzed via mode analysis. The reliability of crack detection of both sensing systems was compared using a preset experimental scheme.

Findings
Miniaturized antennas can reduce edge influence and the coupling effect. Gain and mutual impedance decrease with the increase in distance between dual tags. Backscatter power shows a decreasing trend and threshold power to activate tags in reader antenna increases. Results show that the miniaturization of size is more suitable for the application of multiple sensors.

Originality/value
By comparing two groups of sensing systems, the consistency of crack detection sensitivity is better when small tags are placed in parallel, which provides a theoretical basis for the application of small, passive and densely distributed crack sensors in the future.
Synthesis of the unusual lipid bis(monoacylglycero)phosphate in environmental bacteria
Authors: Czolkoss Simon , Borgert Pia , Poppenga Tessa , Hölzl Georg , Aktas Meriyem , Narberhaus Franz 
Published: September 2021

SummaryThe bacterial membrane is constantly remodelled in response to environmental conditions and the external supply of precursor molecules. Some bacteria are able to acquire exogenous lyso‐phospholipids and convert them to the corresponding phospholipids. Here, we report that some soil‐dwelling bacteria have alternative options to metabolize lyso‐phosphatidylglycerol (L‐PG). We find that the plant‐pathogen Agrobacterium tumefaciens takes up this mono‐acylated phospholipid and converts it to two distinct isoforms of the non‐canonical lipid bis(monoacylglycero)phosphate (BMP). Chromatographic separation and quadrupole‐time‐of‐flight MS/MS analysis revealed the presence of two possible BMP stereo configurations acylated at either of the free hydroxyl groups of the glycerol head group. BMP accumulated in the inner membrane and did not visibly alter cell morphology and growth behaviour. The plant‐associated bacterium Sinorhizobium meliloti was also able to convert externally provided L‐PG to BMP. Other bacteria like Pseudomonas fluorescens and Escherichia coli metabolized L‐PG after cell disruption, suggesting that BMP production in the natural habitat relies both on dedicated uptake systems and on head‐group acylation enzymes. Overall, our study adds two previously overlooked phospholipids to the repertoire of bacterial membrane lipids and provides evidence for the remarkable condition‐responsive adaptation of bacterial membranes.
Antibacterial efficacy of in‐house designed cell‐penetrating peptide against multi‐drug resistant strains of Salmonella Enteritidis and Salmonella Typhimurium
Authors: Nishanth Maria Anto Dani , Bhoomika Sirsant , Gourkhede Diksha , Dadimi Bhargavi , Vergis Jess , Malik Satya Veer Singh , Barbuddhe Sukhadeo Baliram , Rawool Deepak Bhiwa 
Published: September 2021

SummaryThe in vitro antibacterial efficacy of an in‐house designed cell‐penetrating peptide (CPP) variant of Cecropin A (1–7)‐Melittin (CAMA) (CAMA‐CPP) against the characterized multi‐drug resistant (MDR) field strains of Salmonella Enteritidis and Salmonella Typhimurium were evaluated and compared with two identified CPPs namely, P7 and APP, keeping CAMA as control. Initially, the minimum inhibitory concentration (MIC) (μg ml−1) of in‐house designed CAMA‐CPP, APP and CAMA was determined to be 3.91, whereas that of P7 was 7.81; however, the minimum bactericidal concentration (MBC) of all the peptides were twice the MIC. CAMA‐CPP and CAMA were found to be stable under different conditions (high‐end temperatures, proteinase‐K, cationic salts, pH and serum) when compared to the other CPPs. Moreover, CAMA‐CPP exhibited negligible cytotoxicity in HEp‐2 and RAW 264.7 cell lines as well as haemolysis in the sheep and human erythrocytes with no adverse effects against the commensal gut lactobacilli. In vitro time‐kill assay revealed that the MBC levels of CAMA‐CPP and APP could eliminate the intracellular MDR‐Salmonella infections from mammalian cell lines; however, CAMA and P7 peptides were ineffective. CAMA‐CPP appears to be a promising antimicrobial candidate and opens up further avenues for its in vivo clinical translation.
Implementation for impact—Measurement, partnership approaches, and storytelling
Authors: Carson Lisa , Althaus Catherine , Sullivan Helen , van Wanrooy Brigid 
Published: September 2021

AbstractThis is an introductory article to the AJPA symposium on 'Generating and demonstrating implementation impact'. It provides an overview and synthesis of key themes canvassed in the papers, which includes a focus on implementation for impact regarding measurement, partnership approaches, and storytelling.
Maternal serum fructosamine levels and stillbirth: a case–control study of the Stillbirth Collaborative Research Network
Authors: Arslan E , Allshouse AA , Page JM , Varner MW , Thorsten V , Parker C , Dudley DJ , Saade GR , Goldenberg RL , Stoll BJ , Hogue CJ , Bukowski R , Conway D , Pinar H , Reddy UM , Silver RM 
Published: September 2021

ObjectiveTo evaluate the association between maternal fructosamine levels at the time of delivery and stillbirth.DesignSecondary analysis of a case–control study.SettingMulticentre study of five geographic catchment areas in the USA.PopulationAll singleton stillbirths with known diabetes status and fructosamine measurement, and representative live birth controls.Main outcome measuresFructosamine levels in stillbirths and live births among groups were adjusted for potential confounding factors, including diabetes. Optimal thresholds of fructosamine to discriminate stillbirth and live birth.ResultsA total of 529 women with a stillbirth and 1499 women with a live birth were included in the analysis. Mean fructosamine levels were significantly higher in women with a stillbirth than in women with a live birth after adjustment (177 ± 3.05 versus 165 ± 2.89 μmol/L, P < 0.001). The difference in fructosamine levels between stillbirths and live births was greater among women with diabetes (194 ± 8.54 versus 162 ± 3.21 μmol/L), compared with women without diabetes (171 ± 2.50 versus 162 ± 2.56 μmol/L). The area under the curve (AUC) for fructosamine level and stillbirth was 0.634 (0.605–0.663) overall, 0.713 (0.624–0.802) with diabetes and 0.625 (0.595–0.656) with no diabetes.ConclusionsMaternal fructosamine levels at the time of delivery were higher in women with stillbirth compared with women with live birth. Differences were substantial in women with diabetes, suggesting a potential benefit of glycaemic control in women with diabetes during pregnancy. The small differences noted in women without diabetes are not likely to justify routine screening in all cases of stillbirth.Tweetable abstractMaternal serum fructosamine levels are higher in women with stillbirth than in women with live birth, especially in women with diabetes.
Activation of angiotensin‐converting enzyme 2/angiotensin (1–7)/mas receptor axis triggers autophagy and suppresses microglia proinflammatory polarization via forkhead box class O1 signaling
Authors: Dang Ruili , Yang Mengqi , Cui Changmeng , Wang Changshui , Zhang Wenyuan , Geng Chunmei , Han Wenxiu , Jiang Pei 
Published: September 2021

AbstractBrain renin‐angiotensin (Ang) system (RAS) is implicated in neuroinflammation, a major characteristic of aging process. Angiotensin (Ang) II, produced by angiotensin‐converting enzyme (ACE), activates immune system via angiotensin type 1 receptor (AT1), whereas Ang(1–7), generated by ACE2, binds with Mas receptor (MasR) to restrain excessive inflammatory response. Therefore, the present study aims to explore the relationship between RAS and neuroinflammation. We found that repeated lipopolysaccharide (LPS) treatment shifted the balance between ACE/Ang II/AT1 and ACE2/Ang(1–7)/MasR axis to the deleterious side and treatment with either MasR agonist, AVE0991 (AVE) or ACE2 activator, diminazene aceturate, exhibited strong neuroprotective actions. Mechanically, activation of ACE2/Ang(1–7)/MasR axis triggered the Forkhead box class O1 (FOXO1)‐autophagy pathway and induced superoxide dismutase (SOD) and catalase (CAT), the FOXO1‐targeted antioxidant enzymes. Meanwhile, knockdown of MasR or FOXO1 in BV2 cells, or using the selective FOXO1 inhibitor, AS1842856, in animals, suppressed FOXO1 translocation and compromised the autophagic process induced by MasR activation. We further used chloroquine (CQ) to block autophagy and showed that suppressing either FOXO1 or autophagy abrogated the anti‐inflammatory action of AVE. Likewise, Ang(1–7) also induced FOXO1 signaling and autophagic flux following LPS treatment in BV2 cells. Cotreatment with AS1842856 or CQ all led to autophagic inhibition and thereby abolished Ang(1–7)‐induced remission on NLRP3 inflammasome activation caused by LPS exposure, shifting the microglial polarization from M1 to M2 phenotype. Collectively, these results firstly illustrated the mechanism of ACE2/Ang(1–7)/MasR axis in neuroinflammation, strongly indicating the involvement of FOXO1‐mediated autophagy in the neuroimmune‐modulating effects triggered by MasR activation.
Antimicrobial action of photodynamic therapy on Enterococcus faecalis biofilm using curing light, curcumin and riboflavin
Authors: Moradi Mahsa , Fazlyab Mahta , Pourhajibagher Maryam , Chiniforush Nasim 
Published: September 2021

AbstractThe aim of this study was to assess the effect of antimicrobial photodynamic therapy (aPDT) with curcumin and riboflavin on three‐week Enterococcus faecalis biofilm. At first the 15‐mm root canals of 65 single rooted extracted human teeth (including maxillary incisors, mandibular and maxillary canines and mandibular premolars) were separated from the crown and were prepared with ProTaper instruments. After autoclave sterilisation, samples were inoculated with E. faecalis suspension, and incubated for three weeks. After ensuring biofilm formation by scanning electron microscopy (SEM) in two teeth, the remaining 63 teeth were randomly divided into seven groups (n = 9): aPDT + curcumin, aPDT + riboflavin, LED, curcumin, riboflavin, 5.25% NaOCl (positive control) and no intervention (negative control). For light source a LED unit with 390–480 nm wavelength (peak of 460 nm), power density of 1000 ± 100 mW cm−2 and mean energy density of 60 J cm−2 was used. The roots were horizontally sectioned into coronal, middle and apical thirds each with 5 mm thicknesses. Dentin chips with equal weight (1 ± 0.005 g) were collected from the root canal walls with Gates Glidden drills and were transferred into microtubes containing 1 mL of sterile saline and vortexed for 30 s. Next, 10 µL of the contents of each tube was serially diluted and eventually, 10 µL of each solution was cultured on BHI agar. The number of colony‐forming units was determined. Data were analysed using the Kruskal–Wallis and Friedman tests. The colony reduction was not significantly different between NaOCl and either riboflavin + LED or Curcumin + LED. The 5.25% NaOCl group showed maximum reduction in colony count, compared with the negative control (P = 0.00). Groups with aPDT with Curcumin + LED (P = 0.005), and with riboflavin + LED (P = 0.011) showed significant reduction in colony count in all three canal thirds (P < 0.05) without any difference with one another. With significant reduction of E. faecalis colony count, aPDT with Curcumin and riboflavin can serve as an adjunct to routine root canal disinfection method.