bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical analysis of hub cavity leakage
Authors: Xia Ye , Xie Yadong , Li Danwang , Wang Wenjie 
Published: June 2019

Purpose
This paper aims to predict the effect of the hub cavity leakage on the overall performance with numerical simulations in the fan/booster of a high bypass ratio turbofan engine.

Design/methodology/approach
Simulations are conducted for leakage at the fan, the outlet of guide vane and the three-stage booster, as well as hub leakage (contain cavities and sealing). The results obtained are compared to the corresponding simulations without hub leakage.

Findings
The rotor/stator interaction locations are evaluated to discover a better location. The results show that the seal tooth structure produces secondary flow and turbulence in the root of blade suction surface, which increases the aerodynamic loss. The sealing clearance should be controlled to shrink the turbulent region and decrease the leakage.

Practical implications
This work can provide a theoretical guidance and technical support for the compressor design, which avoid many repeated manufactures and reduce waste of resources.

Originality/value
This work improves the understanding of the impact mechanism of hub cavity leakage on the performance when the clearance size of seal is variable.
Effect of synchronous web-based teaching combined with visually creative teaching under the background of information science
Authors: Li Ruan 
Published: June 2019

Purpose
The paper aims to study the effects of the combination of synchronous Web-based teaching with visually creative teaching on art students’ creativity. The twenty-first century is the society of information technology and knowledge-based economy. To cope with the information society, teaching methods would be changed. Traditional chalk and talk can no longer adapt to the changing society. In addition to passing down the tradition, new ideas should also be introduced. In the informational age, the internet becomes an essential living element and synchronous Web-based teaching breaks through the obstacle of space, provides instant and multiple communication channels and creates alternative creativity learning environment.

Design/methodology/approach
With experimental design, totally, 208 students in Fujian University of Technology, as the research objects, were led to a 15-week (3 hours per week for total 45 hours) experimental teaching. The study uses analysis of variance for discussing the effect of synchronous Web-based teaching on art students’ creativity and further understanding the effect of the combination of synchronous Web-based teaching with visually creative teaching on art students’ creativity.

Findings
The research results show significant effects of synchronous Web-based teaching on creativity, visually creative teaching on creativity and the combination of synchronous Web-based teaching with visually creative teaching on the promotion of creativity.

Research limitations/implications
First, the sample size taken in this study was not large enough to fully reflect the results of the study. The survey sample didn’t cover all the major cities in China, which had a small coverage and couldn’t reflect the research situation of the whole country. Second, the evaluation criteria for artistic students’ creativity were too broad. More specific evaluation rules should be set and the creativity standards should be graded to better guide the implementation of art courses and the cultivation of students’ creativity.

Practical implications
The synchronous Web-based learning environment provides favorable individual thinking space to effectively reduce disturbance among classmates. Synchronous Web-based teaching shares sound, pictures and even films with each other to enrich the learning media. What is more, teachers would be more convenient and fast to deal with materials or handouts or rapidly updating materials and avoiding the loss of handouts.

Originality/value
This paper studied the effects of the combination of synchronous Web-based teaching with visually creative teaching on art students’ creativity, which was a meaningful and innovative topic. And this study can provide more enlightenment and reference for future education.
Organizational and Talent attributes of the Indian IT industry
Authors: Cherian Kelitha , Kamalanabhan T.J. 
Published: June 2019

PurposeThis study is a comparative organizational analysis of the four subsectors of the Indian information technology (IT) industry, namely, IT service (ITS), business process outsourcing (BPO), software products services (SPS) and engineering and R&D (ER&D). The purpose of this paper is to empirically identify the cross-sectorial attributes, organizational characteristics and the talent best suited to it.Design/methodology/approachData were collected using a qualitative research design with semi-structured interviews of 17 industry experts.FindingsFindings suggest there are differences in the internal organization of each subsector and this influences the talent attracted toward it. ITS and BPO are perceived as customer driven sectors where technology is an enabler to facilitate smooth functioning of customer operations. Conversely, technology is the core factor that drives SPS and ER&D. Similar observations and differences in the design, environment, individual motives and competencies are identified. The study also identified the inter-relationships between organizational characteristics, task and social structures in the IT industry using Perrow’s organizational theory.Research limitations/implicationsThe findings identify contextual dimensions and shared patterns that exist between the subsectors. At the same time, it distinguishes each subsector in terms of observable and objective characteristics. Significantly, the study highlights the inter-relationships between technology, task, raw material, goal and social interactions. However, the authors stop short of framing hypotheses to test the relationships identified here.Originality/valueThis cross-sectorial study delineates between the four subsectors and provides a foundation for pursuing future investigations in the right direction. This attempt to systematically analyze and compare all the subsectors of the IT industry simultaneously is a distinctive approach. The sectorial diversity suggests a need for talent management practices that will fit the unique characteristics of each subsector.
Enablers of entrepreneurial self-efficacy in a developing country
Authors: Memon Maqsood , Soomro Bahadur Ali , Shah Naimatullah 
Published: June 2019

PurposeThe purpose of this paper is to investigate the factors affecting entrepreneurial self-efficacy (ESE) in a developing country (Pakistan). The literature reports that entrepreneurship education does not enhance the level of ESE of the students. In the same vein, it is strongly emphasized that self-efficacy is the basic element in the entrepreneur’s undertakings. However, limited research has been conducted on the subject and the factors that impact ESE in the context of developing economies.Design/methodology/approachA quantitative approach was adopted, and data were collected from the 564 target respondents of different private and public universities of Pakistan. Structural equation modeling was used to investigate the association between the variables of the conceptual model.FindingsThis study found a positive and significant impact of the predictors, entrepreneurial knowledge, entrepreneurial experiences, instrumental readiness and risk propensity on ESE among the students.Practical implicationsThe findings of the study will help in developing self-efficacy for entrepreneurship in young potential entrepreneurs. They will also assist higher education management in developing and designing entrepreneurship academic curriculum and programs for the achievement of program learning outcomes. In addition, the findings will contribute to the literature of entrepreneurship and self-efficacy factors in the context of the developing country.Originality/valueThe results of the study confirm empirically tested factors that have a positive impact on ESE in a developing country setting.
Analytical considerations of thermal storage and interface evolution of a PCM with/without porous media
Authors: Xu Huijin , Wang Yan , Han Xingchao 
Published: June 2019

Purpose
Phase change energy storage is an important solution for overcoming human energy crisis. This study aims to present an evaluation for the thermal performances of a phase change material (PCM) and a PCM–metal foam composite. Effects of pore size, pore density, thermal conductivity of solid structure and mushy region on the thermal storage process are examined.

Design/methodology/approach
In this paper, temperature, flow field and solid–liquid interface of a PCM with or without porous media were theoretically assessed. The influences of basic parameters on the melting process were analyzed. A PCM thermal storage device with a metal foam composite is designed and a thermodynamic analysis for it is conducted. The optimal PCM temperature and the optimal HTF temperature in the metal foam-enhanced thermal storage device are derived.

Findings
The results show that the solid–liquid interface of pure PCM is a line area and that of the mixture PCM is a mushy area. The natural convection in the melting liquid is intensive for a PCM without porous medium. The porous medium weakens the natural convection and makes the temperature field, flow field and solid–liquid interface distribution more homogeneous. The metal foam can greatly improve the heat storage rate of a PCM.

Originality/value
Thermal storage rate of a PCM is compared with that of a PCM–metal foam composite. A thermal analysis is performed on the multi-layered parallel-plate thermal storage device with a PCM embedded in a highly conductive porous medium, and an optimal melting temperature is obtained with the exergy optimization. The heat transfer enhancement with metal foams proved to be necessary for the thermal storage application.
Employment targeting in a frictional labor market
Authors: Ghate Chetan , Mazumder Debojyoti 
Published: June 2019

Purpose
Governments in both developing and developed economies play an active role in labor markets in the form of providing both formal public sector jobs and employment through public workfare programs. The authors refer to this as employment targeting. The purpose of the paper is to consider different labor market effects of employment targeting in a stylized model of a developing economy. In the context of a simple search and matching friction model, the authors show that the propensity for the public sector to target more employment can increase the unemployment rate in the economy and lead to an increase in the size of the informal sector.

Design/methodology/approach
The model is an application of a search and matching model of labor market frictions, where agents have heterogeneous abilities. The authors introduce a public sector alongside the private sector in the economy. Wage in the private sector is determined through Nash bargaining, whereas the public sector wage is exogenously fixed. In this setup, the public sector hiring rate influences private sector job creation and hence the overall employment rate of the economy. As an extension, the authors model the informal sector coupled with the other two sectors. This resembles developing economies. Then, the authors check the overall labor market effects of employment targeting through public sector intervention.

Findings
In the context of a simple search and matching friction model with heterogeneous agents, the authors show that the propensity for the public sector to target more employment can increase the unemployment rate in the economy and lead to an increase in the size of the informal sector. Employment targeting can, therefore, have perverse effects on labor market outcomes. The authors also find that it is possible that the private sector wage falls as a result of an increase in the public sector hiring rate, which leads to more job creation in the private sector.

Originality/value
What is less understood in the literature is the impact of employment targeting on the size of the informal sector in developing economies. The authors fill this gap and show that public sector intervention can have perverse effects on overall job creation and the size of the informal sector. Moreover, a decrease in the private sector wage due to a rise in public sector hiring reverses the consensus findings in the search and matching literature which show that an increase in public sector employment disincentivizes private sector vacancy postings.
Experimental investigation of zeolite and limestone powder on self-compacting concrete strength after early loading
Authors: Nejati Faeze , Ahmadi Samira , Edalatpanah S.A. 
Published: June 2019

Purpose
Modern construction methods have been developed with the goal of reducing construction time as much as possible, which results in some situations during construction and within the first few days after it, when concrete is subjected to exceptionally high loads. The precast concrete, which is the concrete in very early ages, may result in severe cracks or damages. In conventional construction projects, sometimes working with concrete, which had not reached its ultimate strength, is an unavoidable matter of fact. This paper aims to discuss these issues.

Design/methodology/approach
Researchers in the field of construction materials have done their best to make some changes in the different parts of the concrete in order to bring about reforms, based on the existing needs, and achieve new quality and primacy from concrete. One kind of concrete, the emergence of which dates back to many years ago, is self-compacting concrete. Thanks to its high efficiency for the parts with complex forms of high-density steel, this kind of concrete suggests new prospects.

Findings
This study aims at evaluating the effect of early loads on the 28-day compressive strength of concretes with zeolite and limestone powder under different curing conditions (wet or dry). In this regard, two self-compacting concrete mix designs with the same ratio of water to cementations materials and 0.4 percent and 10 percent zeolite have been considered; therefore, concrete cube samples with zeolite and limestone powder in different curing conditions at ages of three, one and seven days under preloading with 80–90 percent of compressive strength are damaged, and after curing in different conditions, their 28-day compressive strength is measured. According to the results, the recovery of the 28-day compressive strength of damaged samples, compared to that of intact samples, is possible in all curing conditions. The experiments that have been performed on concrete samples under dry and wet curing conditions show that the full recovery of compressive strength of damaged samples compared to that of intact ones happened only in preloaded samples at the age of one days, and in other ages (three and seven days) the 28-day strength reduction has occurred in damaged samples compared to the that in intact samples. The results of concrete samples with zeolite and without limestone powder at the age of one day indicate the greatest impact on other samples on the 28-day compressive strength of damaged samples compared to that of intact ones, occurring under dry condition.

Originality/value
This research analyzed and studied the influence under wet and dry curing conditions and the presence of limestone powder and zeolite fillers in recovering of the 28-day compressive strength of preloaded concrete samples at early stages (one, three and seven days) after the construction of the concrete.
Contact status between seal ring and its support: crucial factor in hydrostatic mechanical face seal
Authors: He Qiang , Huang Weifeng , Liu Ying , Liu Xiangfeng , Li Yongjian , Wang Yuming 
Published: June 2019

Purpose
This paper aims to investigate the influence of the contact status between the seal ring and its support on the seal performance in hydrostatic mechanical face seal.

Design/methodology/approach
A thermal fluid-solid interaction (TFSI) model of hydrostatic mechanical face seal is further developed, in which the multi-body contacts between components are particularly given more attention. The numerical models of the flow field and complete seal assemblies are developed. A specific energy equation is obtained to simplify the calculation of film temperature. Based on the mechanism for the continuity condition of the physical quantities at the fluid–solid interface, the TFSI model uses an on-line iterative coupling method.

Findings
The contact status between seal ring and its support affects the seal performance significantly. The rotating ring and the stationary ring contribute differently because of the contact status difference.

Originality/value
The contact status between the seal ring and the ring seat is key to gain an insight into the performance of the hydrostatic mechanical face seal thus provides guidance for mechanical seal design.
Awareness and challenges of building information modelling (BIM) implementation in the Yemen construction industry
Authors: Gamil Yaser , Rahman Ismail Abd Rahman 
Published: June 2019

Purpose
This paper aims to investigate the awareness of construction practitioners of the adoption of building information modeling (BIM) and identification of the dominant challenges of implementing BIM in the life cycle of a construction project.

Design/methodology/approach
This study was sequentially conducted in the following in three main phases: a preliminary study of archival literature, where a rigorous study of the literature was conducted to identify the challenges of adopting BIM in the construction industry which was to be applied later to the challenges in the case of the Yemen construction industry; data collection, where data were collected using a questionnaire survey targeting 123 Yemeni construction practitioners working in managerial and technical levels; and data analysis, where data were analyzed using descriptive analysis by calculating the average index and standard deviations. The data were analyzed using the SPSS software.

Findings
The results show that the most critical challenges to adopt BIM are financial restrictions, lack of BIM knowledge, improper introduction of BIM concepts, lack of awareness of BIM benefits and no governmental enforcement. The study recommends policymakers and construction players to consider the challenges for a better introduction of BIM in the Yemen construction industry.

Research limitations/implications
This research focuses on the awareness and challenges of implementing BIM in the Yemen construction industry.

Practical implications
The findings of this study will help policymakers develop more constructive strategies to reduce the challenges and introduce governmental agendas towards the widespread use of the BIM concept and technology in the Yemen construction industry. The study suggested an in-depth investigation into the current curriculum in the Yemen universities and recommended the introduction of BIM concept in engineering courses.

Social implications
This study focused on the challenges of implementing BIM and the role of the social aspect in the issue.

Originality/value
From the extensive review of previous findings, this paper concentrates on the challenged to the implementation of BIM in the Yemen construction industry. There are lack of investigative studies that focus on the introduction of new technologies to advance the Yemen construction sector. Therefore, the findings help the authority to diagnose and address the sources of these challenges and introduce new solutions to the industry.
Earliness of SME internationalizationand performance
Authors: Santhosh Channappa 
Published: June 2019

PurposeThe purpose of this paper is to understand the mediating effects of Chief Executive officer (CEO) attributes on the earliness of internationalization and performance in context of Indian small and medium enterprises (SMEs).Design/methodology/approachThe proposed framework is tested through analysis of a sample of 102 internationalized SMEs of the engineering industry in the Bangalore city region of India.FindingsResults highlight that CEOs age and educational background moderates between early internationalization and performance in the Indian SME context.Practical implicationsOverall results facilitate in leveraging the decision-maker’s capabilities to successfully formulate and strategize their international marketing efforts to achieve higher performance.Originality/valueThe study enriches the importance of CEO attributes in influencing the early internationalization and degree of internationalization in the context of an emerging economy where studies are limited.
Financial stability: does social activism matter?
Authors: Ozili Peterson K. 
Published: June 2019

Purpose
This study investigate the impact of social activism on financial system stability.

Design/methodology/approach
Financial stability was analysed from two complementary perspectives: bank-led financial stability and financial system stability driven by sector-wide credit supply. Social activism was analysed from three perspectives: gender equality advocacy, environmental sustainability advocacy and social protection advocacy.

Findings
The findings reveal that gender equality and environmental sustainability advocacy have significant positive effects for financial stability, whereas social protection advocacy has a significant negative effect for financial stability. In addition, social activism has negative effects for financial stability in the post-2008 financial crisis era. Finally, there are differential effects for country-groups, for instance, social activism strongly improves bank-led financial stability in African countries and for BLEND countries (countries that are eligible for International Development Association (IDA) borrowing based on per capita income levels and are also creditworthy for some borrowing from the International Bank of Restructuring and Development). The findings are relevant for the on-going debate about whether social inclusivity and activism has any economic value for the stability of businesses and the financial system. The findings have implications.

Research limitations/implications
The implication for policy-making is that the pressure on, or commitment of, financial institutions to be socially inclusive in all social matters such as gender equality, environmental sustainability and social protection does not guarantee stability in the financial system – whether bank-led financial stability or sector-wide financial stability. Therefore, regulators should ensure that financial institutions exercise careful discretion when adjusting their risk models to include all “social risk” factors amidst the recent pressure on corporations to be socially inclusive.

Practical implications
Another implication for business practice is that business leaders in financial institutions should identify the optimal level of social inclusivity that improves the stability of their corporations, because it would seem counterproductive if business leaders adopt full-scale social inclusion (or considerations) that subsequently make their corporations financially unstable which could lead to loss of shareholders wealth.

Originality/value
This study is the first attempt to investigate the impact of social activism on financial stability to determine whether greater social activism promotes stability or instability in the financial system.