bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical study of melting heat transfer in stagnation-point flow of hybrid nanomaterial (MWCNTs+Ag+kerosene oil)
Authors: Hayat Tasawar , Muhammad Khursheed , Alsaedi Ahmed 
Published: June 2021

Purpose
The purpose of this study is to analyze hybrid nanofluid (MWCNTs+Ag+Kerosene oil) over a stretched cylinder. Flow analysis is carried out in presence of stagnation-point. Features of heat transport are examined via melting conditions.

Design/methodology/approach
Governed expression (partial differential equations) for flow and heat transfer are transmitted into ordinary differential equations (ODEs) via applying adequate transformations. For solutions development shooting method (bvp4c) is used on these non-linear coupled ODEs.

Findings
Comparative observation among hybrid nanofluid (MWCNTs+Ag+Kerosene oil), basefluid (kerosene oil) and nanofluid (MWCNTs+Kerosene oil) are performed. Influences of physical parameters on heat transfer rate, velocity, skinfriction coefficient and temperature are visualized graphically. Higher values nanoparticle volume fractions, curvature parameter, melting parameter and velocity ratio parameter lead to intensification in the velocity profile. The temperature of the fluid reduces with higher values nanoparticle volume fractions, curvature parameter and melting parameter. The surface friction coefficient is minimized via a higher melting parameter and velocity ratio parameter. Heat transmission rate intensifies with velocity ratio parameter, nanoparticle volume friction and curvature parameter while it reduces gradually with larger melting parameter. During comparative study performance of hybrid nanomaterial (MWCNTs+Ag+Kerosene oil) is outstanding and is proceeded by nanomaterial (MWCNTs+ Kerosene oil) and basefluid (kerosene oil).

Originality/value
In the presented study authors have analyzed the flow of hybrid nanomaterial (MWCNTs+Ag+Kerosene oil) by a stretching cylinder. The further cylinder is subjected to stagnation point and melting condition. The authors believe that all the consequences of the presented study and numerical technique (bvp4c) are original and not published before.
Tribological characterization of friction stir welded dissimilar aluminum alloy AA6061–AA5083 reinforced with CeO2 and La2O3 nanoparticles
Authors: M. Arun , M. Muthukumaran , S. Balasubramanian 
Published: June 2021

Purpose
Dissimilar materials found applications in the structural fields to withstand the different types of loads and provide multi-facet properties to the final structure. Aluminum alloy materials are mostly used in aerospace and marine industries to provide better strength and safeguard the material from severe environmental conditions. The purpose of this study is to develop new material with superior strength to challenge the severe environmental conditions.

Design/methodology/approach
In the present investigation, friction stir welding (FSW) dissimilar joints were prepared from AA6061 and AA5083 aluminum alloys, and the weld nugget (WN) was reinforced with hard reinforcement particles such as La2O3 and CeO2. The tribological and mechanical properties of the prepared materials were tested to analyze the suitability of material in the aerospace and marine environmental conditions.

Findings
The results showed that the AA6061–AA5083/La2O3 material exhibited better mechanical and tribological characteristics. The FSW dissimilar AA6061–AA5083/La2O3 material exhibited lower wear rate of 7.37 × 10−3 mm3/m and minimum friction coefficient of 0.31 compared to all other materials owing to the reinforcing effect of La2O3 particles and the fine grains formed by FSW process at WN region. Further, FSW dissimilar AA6061–AA5083/La2O3 material displayed a maximum tensile strength and hardness of 378 MPa and 118 HV, respectively, among all the other materials tested.

Originality/value
This work is original and novel in the field of materials science engineering focusing on tribological characteristics of friction stir welded dissimilar aluminum alloys by the reinforcing effect of hard particles such as La2O3 and CeO2.
Research on scale development of consumption rituals
Authors: Fei Xianzheng , Huang Yajing , Huang Qian 
Published: June 2021

PurposeThe current research aims to develop a measurement scale of consumption rituals. On the basis of literature review and second-hand data, this paper conceptualizes consumption rituals and compiles the initial items. Furthermore, through the scale development process, this paper constructs and verifies the four dimensions of consumption rituals, namely, uniqueness, commitment, ceremoniality and nonfunctionality.Design/methodology/approachFirst, qualitative data gathered in an open interview and secondary data from the Internet were examined, and then they were converted into initial statements. Then researchers refined and evaluated the statements to form the initial items. After two rounds of exploratory factor analysis (EFA), the items were tested and improved to make them clear representatives of the conceptual structure and the final items of the Consumption Ritual Scale were formed. Finally, through confirmatory factor analysis (CFA), the items were retested and revised, and the reliability and validity of the scale were assessed, so as to obtain the final scale.FindingsEmpirical studies show that the scale has good reliability and validity, and has good discriminative validity with related variables (such as the sense of sacredness, sense of participation, feeling of awe, sense of control and sense of identity).Originality/valueThis paper selects rituals in the consumption context as the research object, explores and verifies the conceptual dimension, constructs a four-factor dimensional model and develops a measurement scale of consumption rituals.
Artification strategies to improve luxury perceptions: the role of adding an artist name
Authors: Marin Vicente , Barra Cristóbal , Moyano Jorge 
Published: June 2021

Purpose
The purpose of this paper is to examine the impact of adding the name of an artist to an art-infused product as a way to improve luxury perceptions. Additionally, the underlying processes are explored through the mediation of perceptions of aesthetics, exclusivity and brand quality.

Design/methodology/approach
Two experimental studies were conducted with two independent samples of students (n = 215) and the general population (n = 291). A between-subjects design (artist name: present versus absent) was used to test the main effect and mediation, and it was replicated in two different conditions: low- and high-quality brands.

Findings
The results indicate that when an artist’s name is added to the description of an art-infused product, luxury perceptions improve significantly. These results are also explained by a significant complementary mediation of aesthetics, exclusivity and product quality.

Originality/value
This paper addresses important issues in the understanding of alternative ways to gain luxury associations through an artification strategy. This paper clearly contributes to expanding the effects of art infusion in branding, considering the use of artists’ names as a luxury perception booster. In addition, this paper provides insight into the underlying processes and guides marketers on how to manage potential artist collaborations in low- or high-quality brand contexts.
Modeling of the machining parameters in turning of Al-5052/TiC/SiC composites: a statistical modeling approach using grey relational analysis (GRA) and response surface methodology (RSM)
Authors: Pathapalli Venkateshwar Reddy , Reddigari Meenakshi Reddy , Anna Eswara Kumar , Srinivasa Rao P. , Ramana Reddy D V. 
Published: June 2021

PurposeMetal matrix composites (MMC) has been a section which gives an overview of composite materials and owing to those exceptional physical and mechanical properties, particulate-reinforced aluminum MMCs have gained increasing interest in particular engineering applications. Owing to the toughness and abrasive quality of reinforcement components such as silicon carbide (SiC) and titanium carbide (TiC), such materials are categorized as difficult materials for machining. The work aims to develop the model for evaluating the machinability of the materials via the response surface technique by machining three distinct types of hybrid MMCs.Design/methodology/approachThe combined effects of three machining parameters, namely “cutting speed” (s), “feed rate” (f) and “depth of cut” (d), together with three separate composite materials, were evaluated with the help of three performance characteristics, i.e. material removal rate (MRR), cutting force (CF) and surface roughness (SR). Response surface methodology and analysis of variance (ANOVA) both were initially used for analyzing the machining parameters results.FindingsThe contours were developed to observe the combined process parameters along with their correlations. The process variables were concurrently configured using grey relational analysis (GRA) and the composite desirability methodology. Both the GRA and composite desirability approach obtained similar results.Practical implicationsThe results obtained in the present paper will be helpful for decision-makers in manufacturing industries, who work on metal cutting area especially composites, to select the suitable solution by implementing the Grey Taguchi and modeling techniques.Originality/valueThe originality of this research is to identify the suitability of process parameters combination based on the obtained research results. The optimization of machining parameters in turning of hybrid metal matrix composites is carried out with two different methods such as Grey Taguchi and composite desirability approach.
Rock–bit interaction effects on high-frequency stick-slip vibration severity in rotary drilling systems
Authors: Mendil Chafiaa , Kidouche Madjid , Doghmane Mohamed Zinelabidine , Benammar Samir , Tee Kong Fah 
Published: June 2021

PurposeThe drill string vibrations can create harmful effects on drilling performance because they generate the stick-slip phenomenon which reduces the quality of drilling and decreases the penetration rate and may affect the robustness of the designed controller. For this reason, it is necessary to carefully test the different rock-bit contact models and analyze their influences on system stability in order to mitigate the vibrations. The purpose of this paper is to investigate the effects of rock-bit interaction on high-frequency stick-slip vibration severity in rotary drilling systems.Design/methodology/approachThe main objective of this study is an overview of the influence of the rock-bit interaction models on the bit dynamics. A total of three models have been considered, and the drilling parameters have been varied in order to study the reliability of the models. Moreover, a comparison between these models has allowed the determination of the most reliable function for stick-slip phenomenon.FindingsThe torsional model with three degrees of freedom has been considered in order to highlight the effectiveness of the comparative study. Based on the obtained results, it has been concluded that the rock-bit interaction model has big influences on the response of the rotary drilling system. Therefore, it is recommended to consider the results of this study in order to design and implement a robust control system to mitigate harmful vibrations; the practical implementation of this model can be advantageous in designing a smart rotary drilling system.Originality/valueMany rock-bit functions have been proposed in the literature, but no study has been dedicated to compare them; this is the main contribution of this study. Moreover, a case study of harmonic torsional vibrations analysis has been carried out in well-A, which is located in an Algerian hydrocarbons field, the indices of vibrations detection are given with their preventions.
The short-term impact of analyst recommendations: evidence from the Indian stock market
Authors: Sharda Shreya 
Published: June 2021

Purpose
This study aims to evaluate the short-term impact of brokerage analysts’ recommendations on abnormal returns using a sample selected from the S&P BSE 100 in the Indian context. The efficient market hypothesis, specifically, its semi-strong form, is tested for “Buy” stock recommendations published in the electronic version of Business Standard. The crucial issue is, are there any abnormal returns that can be earned following a recommendation? If so, how quickly do prices incorporate the information value of these recommendations? It tests the impact of analyst recommendations on average abnormal returns (AARs) and standardized abnormal returns (SRs) to determine their statistical significance.

Design/methodology/approach
Using a sample of stock recommendations published in the e-version of Business Standard, the event study methodology is used to determine whether AARs and SRs are significantly different from zero for the duration of the event window by using several significance tests.

Findings
The findings indicate a marginal opportunity for profit in the short term, restricted to the event day. However, the effect does not persist, i.e. the market is efficient in its semi-strong form implying that investors cannot consistently earn abnormal returns by following analysts’ recommendations. Post the event date, the market reaction to analyst recommendations becomes positive, however, insignificant until the ninth day after the recommendation providing support to the underreaction hypothesis given by Shliefer (2000) and post-recommendation price drift documented by Womack (1996). The study contributes by using different statistical tests to determine the significance of returns.

Practical implications
There are important implications for traders, investors and portfolio managers. The speed with which market prices incorporate publicly available information is useful in formulating trading strategies. However, stock characteristics such as market capitalization, volatility and level of analyst coverage need to be incorporated while making investment decisions.

Originality/value
The study contributes by using different statistical tests to determine the significance of returns.
Preferring the devil you know: Potential applicant reactions to artificial intelligence evaluation of interviews
Authors: Mirowska Agata , Mesnet Laura 
Published: June 2021

AbstractIn search of greater resource savings and efficiencies, companies are turning to new technologies in the interview process, such as artificial intelligence evaluation (AIE). However, little is known about candidate reactions to this new tool. We identified outstanding questions regarding reactions to AIE arising from justice and signaling theories and conducted interviews with 33 professionals to understand their perceptions of AIE use in selection. Participants raised issues related to all four types of justice and indicated that there is a signaling effect of AIE use. Despite acknowledging the superior objectivity of AIE, participants expressed a desire for the maintenance of human elements in the evaluation process, seemingly preferring ‘the devil they know’ (human biases and intuition) rather than the one they do not (AIE algorithm). This result is explored through the lens of uncertainty reduction, discussing theoretical implications for justice and signaling theories, and providing implications for the implementation of AIE in the selection process.
Discriminative ability of trabecular bone score over bone mineral density for vertebral and fragility fracture in patients treated with long‐term and low‐dose glucocorticoid
Authors: Lee Kyung‐Ann , Kim JongSun , Kim Hyun‐joo , Kim Hyun‐Sook 
Published: June 2021

AbstractAimTo evaluate the ability of the trabecular bone score (TBS) to discriminate vertebral fracture (VF) and fragility fracture (FF) in patients with chronic inflammatory rheumatic diseases on long‐term and low‐dose glucocorticoid (GC) treatment and those without exposure to GC.MethodsThis study assessed TBS and bone mineral density (BMD) in chronic GC users, defined as ≥2.5 mg/d of prednisone for >3 months (n = 89, mean age: 62.5 ± 11 years), and in controls (n = 59, mean age: 60.3 ± 9.6 years). Osteoporosis risk factors, radiographs of the thoracolumbar spine, non‐VF history, osteoporosis drugs, and current/cumulative GC doses were collected. Patients were classified as high (TBS <1.23), intermediate (1.23‐1.31), or low risk (>1.31), according to the fracture risk based on a recent meta‐analysis.ResultsThe mean current dose and duration of GC treatment were 3.9 ± 1.9 mg/d and 3.9 ± 4.2 years, respectively. The prevalence of VF was significantly higher in chronic GC users than in controls (20.2% vs 5.1%, P = .010), although the prevalence of non‐VF was similar (11.2% vs 5.1%). The GC group had significantly lower L1‐L4 TBS and femur total BMD than did the controls (all with P < .01) without significantly different lumbar BMD. TBS (<1.31) showed a higher sensitivity for patients with VF and FF (83.3% and 81.8%, respectively) than with densitometric osteoporosis in the GC group (61.1% and 59.1%, respectively). Using the receiver operating characteristic curve, TBS <1.31 showed better diagnostic accuracy than TBS <1.23 and BMD in chronic GC users.ConclusionTBS is more sensitive than BMD in detecting VF and FF in chronic GC users, even at a lower dose.
Different pathologic types of early stage lung adenocarcinoma have different post‐operative recurrence patterns
Authors: Liu Xianping , Sun Kunkun , Yang Fan , Sui Xizhao , Jiang Guanchao , Wang Jun , Li Xiao 
Published: June 2021

AbstractObjectivesTo accurately describe the pattern, timing and predictors of disease recurrence after curative resection for different types of early‐stage lung adenocarcinoma (LUAD).MethodsA total of 1962 patients with early‐stage LUAD were included. The presence of micropapillary, solid components or poorly differentiated cancer as a clinical variable was named “high‐grade” adenocarcinoma (HGADC), while others were classified as “low‐grade” adenocarcinoma (LGADC). Predictive factors for specific recurrence patterns were assessed by univariate and multivariate analyses using Cox‐proportional hazard regression models. Event dynamics, based on the hazard rate, were evaluated.ResultsAt a median follow‐up of 36.0 months, 137 (6.98%) of 1962 patients suffered from recurrence. Multivariable Cox analysis revealed that HGADC was an independent predictor for overall recurrence (hazard ratio [HR] 3.08, 95% confidence interval [CI] 2.09–4.52, p < 0.001), local recurrence (HR 2.77, 95% CI 1.38–5.55, p < 0.001), distant metastasis (HR 3.22, 95% CI 2.03–5.11, p < 0.001), chest recurrence (HR 2.80, 95% CI 1.65–4.75, p < 0.001) and brain recurrence (HR 4.11, 95% CI 1.83–9.22, p < 0.001). However, HGADC (HR 1.56, 95% CI 0.63–3.86, p = 0.335 in univariate analysis) was not a risk factor for bone recurrence. The hazard curve of the whole group presented a double‐peaked pattern. Different types of LUAD had different hazard curves. HGADC patients exhibited higher hazard rates than LGADC patients during the whole follow‐up. In addition, the recurrence hazard curve in HGADC patients showed a typical “double‐peaked” pattern, while the curve in LGADC patients displayed a smooth curve after surgery.ConclusionsDifferent postoperative recurrence patterns were seen in HGADC and LGADC. Site‐specific recurrence patterns were also different in HGADC and LGADC types.
MR1‐dependent immune surveillance of the skin contributes to pathogenesis and is a photobiological target of UV light therapy in a mouse model of atopic dermatitis
Authors: Naidoo Karmella , Woods Katherine , Pellefigues Christophe , Cait Alissa , O'Sullivan David , Gell Katie , Marshall Andrew J. , Anderson Regan J. , Li Yanyan , Schmidt Alfonso , Prasit Kef , Mayer Johannes U. , Gestin Aurelie , Hermans Ian F. , Painter Gavin , Jacobsen Elizabeth A. , Gasser Olivier 
Published: June 2021

AbstractBackgroundMucosal‐associated invariant T (MAIT) cells are unconventional T cells which recognize microbial metabolites presented by the major histocompatibility complex class I‐related molecule MR1. Although MAIT cells have been shown to reside in human and murine skin, their contribution to atopic dermatitis (AD), an inflammatory skin disease associated with barrier dysfunction and microbial translocation, has not yet been determined.MethodsGenetic deletion of MR1 and topical treatment with inhibitory MR1 ligands, which result in the absence and functional inhibition of MAIT cells, respectively, were used to investigate the role of MR1‐dependent immune surveillance in a MC903‐driven murine model of AD.ResultsThe absence or inhibition of MR1 arrested AD disease progression through the blockade of both eosinophil activation and recruitment of IL‐4‐ and IL‐13‐producing cells. In addition, the therapeutic efficacy of phototherapy against MC903‐driven AD could be increased with prior application of folate, which photodegrades into the inhibitory MR1 ligand 6‐formylpterin.ConclusionWe identified MAIT cells as sentinels and mediators of cutaneous type 2 immunity. Their pathogenic activity can be inhibited by topical application or endogenous generation, via phototherapy, of inhibitory MR1 ligands.
Effect of high‐flow vs. low‐flow nasal plus mouthguard oxygen therapy on hypoxaemia during sedation: a multicentre randomised controlled trial
Authors: Thiruvenkatarajan V. , Dharmalingam A. , Arenas G. , Wahba M. , Liu W.-M. , Zaw Y. , Steiner R. , Tran A. , Currie J. ,   collaborators
Published: June 2021

SummaryWhether high‐flow vs. low‐flow nasal oxygen reduces hypoxaemia for sedation during endoscopic retrograde cholangiopancreatography is currently unknown. In this multicentre trial, 132 patients ASA physical status 3 or higher, BMI > 30 kg.m‐2 or with known or suspected obstructive sleep apnoea were randomly allocated to high‐flow nasal oxygen up to 60 l.min‐1 at 100% FIO2 or low‐flow nasal oxygen at 4 l.min‐1. The low‐flow nasal oxygen group also received oxygen at 4 l.min‐1 through an oxygenating mouthguard, totalling 8 l.min‐1. Primary outcome was hypoxaemia, defined as SpO2 < 90% regardless of duration. Hypoxaemia occurred in 7.7% (5/65) of patients with high‐flow and 9.1% (6/66) with low‐flow nasal oxygen (percentage point difference −1.4%, 95%CI −10.9 to 8.0; p = 0.77). Between the groups, there were no significant differences in frequency of hypoxaemic episodes; lowest SpO2; peak transcutaneous carbon dioxide; hypercarbia (transcutaneous carbon dioxide > 2.66 kPa from baseline); requirement of chin lift/jaw thrust; nasopharyngeal airway insertion; bag‐mask ventilation; or tracheal intubation. Following adjustment for duration of the procedure, the primary outcome remained non‐significant. In high‐risk patients undergoing endoscopic retrograde cholangiopancreatography, oxygen therapy with high‐flow nasal oxygen did not reduce the rate of hypoxaemia, hypercarbia or the need for airway interventions, compared with combined oral and nasal low‐flow oxygen.