bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical studies of active flow control on wing tip extension
Authors: Vrchota Petr , Prachar Ales , Peng Shia-Hui , Tormalm Magnus , Eliasson Peter 
Published: January 2019

Purpose
In the European project AFLoNext, active flow control (AFC) measures were adopted in the wing tip extension leading edge to suppress flow separation. It is expected that the designed wing tip extension may improve aerodynamic efficiency by about 2 per cent in terms of fuel consumption and emissions. As the leading edge of the wing tip is not protected with high-lift device, flow separation occurs earlier than over the inboard wing in the take-off/landing configuration. The aim of this study is the adoption of AFC to delay wing tip stall and to improve lift-to-drag ratio.

Design/methodology/approach
Several actuator locations and AFC strategies were tested with computational fluid dynamics. The first approach was “standard” one with physical modeling of the actuators, and the second one was focused on the volume forcing method. The actuators location and the forcing plane close to separation line of the reference configuration were chose to enhance the flow with steady and pulsed jet blowing. Dependence of the lift-to-drag benefit with respect to injected mass flow is investigated.

Findings
The mechanism of flow separation onset is identified as the interaction of slat-end and wing tip vortices. These vortices moving toward each other with increasing angle of attack (AoA) interact and cause the flow separation. AFC is applied to control the slat-end vortex and the inboard movement of the wing tip vortex to suppress their interaction. The separation onset has been postponed by about 2° of AoA; the value of ift-to-drag (L/D) was improved up to 22 per cent for the most beneficial cases.

Practical implications
The AFC using the steady or pulsed blowing (PB) was proved to be an effective tool for delaying the flow separation. Although better values of L/D have been reached using steady blowing, it is also shown that PB case with a duty cycle of 0.5 needs only one half of the mass flow.

Originality/value
Two approaches of different levels of complexity are studied and compared. The first is based on physical modeling of actuator cavities, while the second relies on volume forcing method which does not require detailed actuator modeling. Both approaches give consistent results.
Ranking of choice cues for smartphones using the Best–Worst scaling method
Authors: Pinto Luis , Kaynak Erdener , Chow Clement S.F. , Zhang Lida L. 
Published: January 2019

Purpose
The number of studies on the use of choice cues in the purchase decision of a smartphone does not appear to be extensive, given the size and rate of growth of the market. Surprisingly, it appears that no study of this type in the Chinese context has been undertaken. Therefore, the purpose of this paper is to fill the existing gap in the marketing literature in this area.

Design/methodology/approach
Best–Worst (BW) scaling method was used in the study. It is suggested that the method overcomes some of the biases commonly found in surveys where Likert-type scales are used, and it has superior discriminating power, because respondents are asked to rank the most and the least important factor from a group, and are thereby forced to make tradeoffs between factors.

Findings
Among the 13 choice cues, connectivity, price and memory capacity are found to be the most important, whereas recommendation from others, ease of handling and availability of apps are found to be the least important. Findings due to gender, income and age difference were also analyzed and discussed for orderly decision-making purposes.

Practical implications
The ranking of factors showing what choice cues consumers consider most or least important in a particular market helps practitioners to develop appropriate adaptation strategies for the market. The comparison of findings for gender, income and age difference can further help practitioners to devise various alternative marketing strategies for different market segments and identify underserved segments, if any.

Originality/value
The BW scaling method, however, appropriate in ranking order of importance, had never been used in ranking choice cues of smartphone purchase. Moreover, there seems to be a dearth of studies about ranking of choice cues on smartphone purchases in the Chinese context.
Time domain parameter identification of transient electromechanical oscillations
Authors: Sotelo-Castañón Julián , Gutiérrez-Robles José Alberto , Johnson Brian , Moreno Pablo , Guzman Armando 
Published: January 2019

Purpose
The power systems behavior is nonlinear, and this is reflected in that the measurement signals are composed by multi-components. Thus, this paper aims to present a method for analyzing multi-component signals that allow calculating signal parameters such as frequency, damping constant, amplitude and phase for each component, as well as determining the direct current component.

Design/methodology/approach
The method proposed is based in the Z-transform of a damped sinusoidal signal with direct current. Only the Z-transform poles are used to form equation systems which are used to obtain frequency and damping. Then, the amplitude, the phase and the direct current component are determined by the above results.

Findings
The method is able to determine frequencies, damping constants, phases and amplitudes of the different modal components of a signal using only a few measurements. Moreover, the method does not require filter banks tuned with some previous knowledge of signal’s characteristics. The presented test cases of field measured signals show the good performance of the proposed method, which is able to obtain the parameters of interest with a very short observation window.

Originality/value
One quality of this method is that it has a very short delay to reach the first solution and from there you get one result each sample; the delay time is equivalent to 2 + 4C samples where C is the number of components in the signal. Finally, it is concluded that because of the small number of samples that are needed and the low algorithmic complexity of the methodology, the method is apt to make applications in real time.
Recent trend in mixed-model assembly line balancing optimization using soft computing approaches
Authors: Razali Muhamad Magffierah , Kamarudin Nur Hairunnisa , Ab. Rashid Mohd Fadzil Faisae , Mohd Rose Ahmad Nasser 
Published: January 2019

Purpose
This paper aims to review and discuss four aspects of mixed-model assembly line balancing (MMALB) problem mainly on the optimization angle. MMALB is a non-deterministic polynomial-time hard problem which requires an effective algorithm for solution. This problem has attracted a number of research fields: manufacturing, mathematics and computer science.

Design/methodology/approach
This paper review 59 published research works on MMALB from indexed journal. The review includes MMALB problem varieties, optimization algorithm, objective function and constraints in the problem.

Findings
Based on research trend, this topic is still growing with the highest publication number observed in 2016 and 2017. The review indicated that the future research direction should focus on human factors and sustainable issues in the problem modeling. As the assembly cost becomes crucial, resource utilization in the assembly line should also be considered. Apart from that, the growth of new optimization algorithms is predicted to influence the MMALB optimization, which currently relies on well-established algorithms.

Originality/value
The originality of this paper is on the research trend in MMALB. It provides the future direction for the researchers in this field.
Construction education in Ethiopia
Authors: Mengistu Desalegn Girma , Mahesh Gangadhar 
Published: January 2019

PurposeThe purpose of this paper is to evaluate knowledge and skills level of final-year students of undergraduate construction programs in Ethiopia and assess the effectiveness of internship and its coordination under these programs.Design/methodology/approachA mixed-methods approach is used in this study. Data were collected through two separate questionnaires, completed by students and company supervisors (professionals having experience in supervising internship students). Interviews were held with university instructors to supplement findings of the questionnaire.FindingsThe findings show the students have performance shortfalls in most of the required knowledge areas. A significant correlation was found between students’ self-evaluation and supervisors’ evaluation rankings. It was also found that both students and industry perceive the internship to have benefited them. However, the coordination of internship program was found unsatisfactory. These findings indicate there is a room for improvement in the curricula and coordination of internship program.Originality/valueAs performance of the construction industry (CI) is associated with the competence of professionals, it is important to assess the knowledge and skills level of students, and internship coordination for the effective development of CI. Hence, the findings of this paper will help academic institutes to review their curricula and improve their internship coordination mechanism. It has implication for industry organizations in indicating knowledge and skills gap of entry-level professionals which could be filled through training. It may also invite other researchers in the country to focus on construction education for betterment of the CI.
Robust stability of mixed Cohen–Grossberg neural networks with discontinuous activation functions
Authors: Zheng Cheng-De , Liu Ye , Xiao Yan 
Published: January 2019

PurposeThe purpose of this paper is to develop a method for the existence, uniqueness and globally robust stability of the equilibrium point for Cohen–Grossberg neural networks with time-varying delays, continuous distributed delays and a kind of discontinuous activation functions.Design/methodology/approachBased on the Leray–Schauder alternative theorem and chain rule, by using a novel integral inequality dealing with monotone non-decreasing function, the authors obtain a delay-dependent sufficient condition with less conservativeness for robust stability of considered neural networks.FindingsIt turns out that the authors’ delay-dependent sufficient condition can be formed in terms of linear matrix inequalities conditions. Two examples show the effectiveness of the obtained results.Originality/valueThe novelty of the proposed approach lies in dealing with a new kind of discontinuous activation functions by using the Leray–Schauder alternative theorem, chain rule and a novel integral inequality on monotone non-decreasing function.
Should banks be averse to elections? A GMM analysis of recent elections in Ghana
Authors: Broni Mohammed Yaw , Hosen Mosharrof , Mohammed Hardi Nyagsi , Tiamiyu Ganiyatu 
Published: January 2019

Purpose
Actions of incumbent politicians and firms’ managers during election years have been cited as sources of many problems that afflict economies and business entities. Given the controversies surrounding the impact of elections on firms’ soundness, this paper poses a question of whether banks should be averse to elections. Specifically, this study aims to investigate the impact of elections on the profitability and efficiency of banks.

Design/methodology/approach
Based on the authors’ knowledge, this is maiden analysis in this context for Ghana where relatively advanced appropriate GMM technique has been used on annual data from 2012 to 2016.

Findings
This study reveals that banks make higher returns in election years. Additionally, the authors report that government’s economic policies in election years are detrimental to management efficiency, though insignificant.

Practical implications
From an emerging economy perspective, this study would guide policymakers in designing policies that respond to, or minimize, the impact of elections on bank performance. The result of this analysis would also substantiate the market reaction to the changes in the economic, political and financial conditions.

Originality/value
This analysis suggests that firms’ performances in an election year depend on policies and political institutions in place. The authors argue that Ghana, with its exemplary democratic credentials and strong institutions, living alongside a high perception of corruption, is different. The contribution to literature is, first, by limiting this work to the banking sector of Ghana and, second, by incorporating the behaviors of incumbent governments and individuals in the regression specification model.
Monetary policy and macroeconomic responses: non-recursive SVAR study of Egypt
Authors: Shokr Mohamed Aseel , Abdul Karim Zulkefly , Zaidi Mohd Azlan Shah 
Published: January 2019

Purpose
This paper aims to examine the effects of monetary policy and foreign shocks on output, inflation and exchange rate in Egypt.

Design/methodology/approach
This paper studies the effects of monetary policy and foreign shocks on output, inflation and exchange rate by using non-recursive SVAR model and quarterly data.

Findings
First, the empirical results reveal that monetary policy shocks, through changes in interest rate or money supply, have a significant effect on output, inflation and exchange rate in Egypt. Second, the world oil prices and foreign output have significant impacts on output, inflation and exchange rate in Egypt, while foreign interest rate has a significant effect on domestic output and inflation.

Research limitations/implications
The limitation of the study is examining one country only.

Practical implications
The Central Bank of Egypt (CBE) should adjust interest rate to stabilize inflation, output and exchange rate. By stabilizing inflation, output and exchange rate, the CBE would be able to achieve the ultimate targets of monetary policy, namely, price stability and economic growth.

Social implications
It is important for the CBE because it shows the significant effect of monetary policy on macroeconomic variables in Egypt. Also, it is important for people because it shows the important role for the CBE.

Originality/value
It is important for the CBE because it examines the effect of monetary policy and foreign shocks on macroeconomic variables.
CEO transformational leadership and top management team performance: study from GCC
Authors: Suliman Abubakr , Rao A. Srinivasa , Elewa Tamer 
Published: January 2019

Purpose
Various research studies have been carried out to study Chief Executive Officers’ (CEOs’) transformational leadership in driving organizational performance and success. Evidence shows that few studies were carried out on CEO transformational leadership and top management team (TMT) performance in Gulf Cooperation Council (GCC) region. Thus, this study aims to provide a unique contribution and the first of its kind to examine the CEO leadership–TMT performance link across GCC countries.

Design/methodology/approach
In this study, the researchers approached 500 employees and 30 CEOs working in 30 different organizations operating in the GCC countries. The firms were selected conveniently from different industries located in the UAE, Saudi Arabia, Kuwait, Oman and Bahrain. The researchers used the PASW (SPSS) program to analyze the data.

Findings
The findings show that psychological empowerment has no significant role in moderating the transformational leadership – TMT performance relationship. Internal support for innovation plays a significant role in mediating the relationship between transformational leadership and TMT performance.

Research limitations/implications
The present study has not examined the behavioral aspects of CEO followers. Future research may study behavioral characteristics of the entire TMT.

Originality/value
This study contributes to body of research that identifies CEO transactional leadership as perceived by the followers was found to be more important in predicting TMT performance than transformational leadership in the context of organizations located in GCC countries. Managerial implications and future research areas are further discussed.
Citizen-centric model of governmental entrepreneurship
Authors: Kumar Avanish 
Published: January 2019

PurposeThe paper aims to examine a citizen-centric model of governmental entrepreneurship that transforms public service management for the empowerment of marginalized women.Design/methodology/approachThe study adopts a qualitative methodology to analyze the distinctive model of a rural livelihoods program in India. A fieldwork was conducted in four villages, a total of 250 women were interviewed using a semi-structured questionnaire and eight focus-group discussions were conducted. The data were analyzed using constant comparative analysis and discourse analysis. Finally, the findings were shared with women in the study area.FindingsThe analysis suggests that the adoption of distinct management for social welfare program results in social legitimacy and social value creation. JEEViKA illustrates that citizen-centric social entrepreneurship model is an outcome of internal and external governance mechanisms, strategy that thrusts on skills and capacity as investment, tools local women (community resource persons) as instruments and targets spatial saturation as an intervention creates political and economic participation, and that marketability promotes power over economic resources that enable freedom from servitude.Research limitations/implicationsThe model provides a direction to overcome multiple barriers to addressing poverty and marginalization.Practical implicationsPoor and government can leverage through the collaborative capacity to meet ever-evolving social needs by developing a state-society partnership in citizen-centric governmental entrepreneurship.Social implicationsThe policies to overcome large-scale marginalization can adopt citizen-centric model to create social legitimacy that furthers social value among the poor and marginalized rural women.Originality/valueThis study provides a model that illustrates government ability to transform marginalized poor as co-producers of development benefits.
Validation of stage groupings in the eighth edition of the tumor node metastasis classification for lung adenocarcinoma
Authors: Yu Wenguan , Zhao Qingchun , Xia Chunqiu , Dong Ming , Liu Jinghao , Li Xin , Zhao Honglin , Chen Gang , Liu Hongyu , Chen Jun 
Published: January 2019

BackgroundThe purpose of this study was to validate stage groupings in the 8th edition of the tumor node metastasis (TNM) classification for lung adenocarcinoma and explore the non‐anatomic factors that influence the prognosis of lung adenocarcinoma patients in China.MethodsWe retrospectively analyzed the data of 291 lung adenocarcinoma patients at our department between 2008 and 2013. Logrank tests and Cox regression models were used to analyze survival among adjacent stage groupings. Kaplan–Meier curves were used to estimate overall survival (OS).ResultsThere were significant differences in OS in adjacent stage groupings in early stages in the 8th edition. There were also significant differences between patients treated with radical surgery and limited resection (P = 0.027). Lepidic predominant adenocarcinoma (LPA) had better survival rates than acinar predominant (APA), papillary predominant, and solid predominant with mucin production adenocarcinoma (SPA) (P = 0.008). Survival rates of micropapillary predominant adenocarcinoma were lower than the others (P = 0.003). EGFR mutations were closely associated with lepidic predominant (65%, P = 0.56) but less commonly associated with solid predominant with mucin production adenocarcinoma (24%, P = 0.02). There was no significant difference in survival between EGFR gene mutation‐positive and negative groups (P = 0.402).ConclusionThe 8th edition TNM may be more accurate and applicable than the 7th edition for Chinese lung adenocarcinoma patients who have undergone surgical treatment. Stage IV patients may gain survival improvement from radical surgery.
Assets and Liabilities: When Do They Exist?
Authors: Cade Nicole L. , Koonce Lisa , Mendoza Kim I. , Rees Lynn , Tokar Mary B. 
Published: January 2019

ABSTRACTIn this paper, we investigate whether the current references to probability in standard setters' conceptual definitions of assets and liabilities cause individuals to believe that the probability of a future transfer of economic benefits must be above some meaningful threshold for an asset or a liability to exist—a belief that is contrary to standard setters' intent. Results of multiple experiments indicate that the majority of individuals do use a high probability threshold to determine asset existence, whereas for liabilities the majority use a very low threshold. Thus, even under ceteris paribus conditions, liabilities are more frequently judged to exist than assets—a phenomenon analogous to accounting conservatism, as has been discussed in terms of the performance statement. These findings are robust to variation in formal training and in type of liability, and cannot be explained by alternative approaches to judging existence. Consistent with standard setters' intentions, results also suggest that their proposed changes to the definitions of assets and liabilities—changes that attempt to clarify the intended role of probability—do cause a greater proportion of participants to indicate that the relevant financial statement element (asset or liability) exists, relative to participants with no definition. Our study provides important insights for standard setters as they continue work on their missions to update their Conceptual Frameworks and for researchers regarding the role of conservatism on the balance sheet.
Thinking Outside the Block: Projected Phases of Blockchain Integration in the Accounting Industry
Authors: Karajovic Maria , Kim Henry M. , Laskowski Marek 
Published: January 2019

AbstractThis paper aims to propound a thorough and circumspect analysis of the implications of blockchain technology in the accounting profession and its broader industry. The analysis begins with a summary of early developments by first movers and how they are harnessing blockchain technology to improve business practices. Concomitantly, the paper will go on to discuss how this technology will streamline accounting processes, specifically as the technology approaches critical mass. Finally, a discussion of its long‐term implications will follow through a more philosophical and conceptual dialogue. Throughout the paper, criticisms will be raised to address concerns regarding blockchain's widespread use.