The effect of aerofoil camber on cycloidal propellers

2018 ◽  
Vol 90 (8) ◽  
pp. 1156-1167
Author(s):  
Hailang Zhang ◽  
Yu Hu ◽  
Gengqi Wang
Keyword(s):  
High Performance ◽  
Dynamic Stall ◽  
Content Type ◽  
Blade Vortex Interaction ◽  
Air Vehicle ◽  
Rotor Cage ◽  
Turbulent Models ◽  
The One ◽  
The Impact ◽  
Practical Implications

Purpose This paper aims to investigate the impact of aerofoil camber on the performance of micro-air-vehicle-scale cycloidal propellers. Design/methodology/approach First, experiments were conducted to validate the numerical methodology. After that, three turbulent models were compared to select the most accurate one. Then, 2D numerical simulation was carried out on 11 aerofoils with different cambers, including five cambered aerofoils, one symmetrical aerofoil and five inverse cambered aerofoils. The inverse cambered aerofoils are symmetrical about the chord line to the corresponding cambered ones. Findings The cycloidal propeller with large cambered aerofoil gives the lowest hovering efficiency, but with symmetrical aerofoil or small inverse cambered aerofoil shows the highest. Also, blades with large cambered aerofoil display high performance at the upper part of its trajectory, while with symmetrical aerofoil or the inverse cambered aerofoil have their best at the lower part. In addition, intensified downwash can be observed in the rotor cage for all cases. When a blade runs through the top-left part of its circle path, all cases display the feature of deep dynamic stall. When the blade travels through the nadir of its path, the actual angle of attack is close to zero due to the strong downwash. Furthermore, there exits intensified blade-vortex interaction induced by the preceding blade for large cambered aerofoils at the lower-right part of its trajectory. Practical implications This paper develops a new cycloidal propeller which is more efficient than the one already present. Originality/value This paper discovers that the aerofoil camber is a vital design parameter in the performance of cycloidal propeller, and the authors expect that the rotor with deformable aerofoil on camber would achieve much higher efficiency.

The art of unifying high-performance work practices, employee attitudes, and service quality

2019 ◽  
Vol 27 (1) ◽  
pp. 36-38
Keyword(s):  
Service Quality ◽  
High Performance ◽  
Employee Attitudes ◽  
Quality Level ◽  
Learning And Development ◽  
Content Type ◽  
High Performance Work Practices ◽  
Pertinent Information ◽  
The Impact ◽  
Practical Implications

Purpose This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies. Design/methodology/approach This briefing is prepared by an independent writer who adds his/her own impartial comments and places the articles in context. Findings This research paper concentrates on the impact that trust levels between employees and their managers have on their performance and the service-quality level they become focused on delivering. Implementing trust-signaling HR policies, such as a consistently applied and transparent learning and development offering, supports managers in the active work of building trust with their people. Trusted employees reciprocate the feeling and ultimately become higher performers by being more satisfied at work. Originality/value The briefing saves busy executives and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

High involvement management and human resource line sustainability

2006 ◽  
Vol 7 (1) ◽  
pp. 279-286 ◽  
Author(s):  
Paul J. Gollan
Keyword(s):  
Organizational Performance ◽  
Human Resource ◽  
High Performance ◽  
Current Evidence ◽  
High Involvement ◽  
Content Type ◽  
Major Factors ◽  
The Impact ◽  
Practical Implications ◽  
High Involvement Management

PurposeThis article will outline a number of issues for organizations to consider when pursuing sustainable high performance workplace outcomes through high involvement management (HIM) initiatives and identifies those outcomes, which reinforce corporate profitability and corporate survival, and those that satisfy employee aspirations and needs in the workplace.Design/methodology/approachA model is presented that highlights the major factors, influences and outcomes of human resource sustainability in organizations. The paper then advocates an integrated model of the HIM process, emphasising the influence of organizational culture and the impact of the external environment based on human resources capabilities and sustainable organizational outcomes.FindingsOverall, what can be drawn from the research is that high quality communication and consultation between management and employees at the workplace is essential in achieving HIM and improved organizational performance and sustainable outcomes for organizations and employees.Research limitations/implicationsImportantly, the current evidence suggests that there are a number of necessary conditions when implementing HIM processes and approach: the research suggests management should inform, train and equip shopfloor employees to make decisions at their workplace and share ownership in the process.Practical implicationsThe practical implications are that managers need to reassess the role and level of the HR function, specifically its role in persuading organizations to adopt practices that support a sustainable approach.Originality/valueOnly by acknowledging the importance of employee satisfaction and commitment through the development of integrated employee consultation, organizational change, work and life policies, workplace institutions and comprehensive career development programs, will the organization achieve greater efficiency, and productivity.

How can NGOs prevent volunteers from quitting? The moderating role of the NGO type

2019 ◽  
Vol 58 (2) ◽  
pp. 201-220 ◽  
Author(s):  
Jose Miguel Lorente-Ayala ◽  
Natalia Vila-Lopez ◽  
Ines Kuster-Boluda
Keyword(s):  
Self Determination Theory ◽  
Content Type ◽  
Different Types ◽  
Modelling Methodology ◽  
The One ◽  
The Impact ◽  
The Relationship ◽  
Moderating Role ◽  
Practical Implications

Purpose The rise of non-governmental organisations (NGOs) during the last decades has made the volunteer a key element. Motivation and satisfaction have been indicated as predictive indices of their retention. The purpose of this paper is twofold. On the one hand, it seeks to better understand the motivations of the volunteers, addressing the effects of such motivations. On the other hand, it analyses whether the intensity of such antecedents and effects differs depending on the type of NGO with which they work: generalist vs specialist. Design/methodology/approach A study with 847 volunteers from different types of NGOs was done using structural modelling methodology and multi-sample analysis. Findings The type of NGO moderates the relationship between the satisfaction of the volunteer and the intention to recommend. Practical implications Given that in specialist NGOs the impact of satisfaction on the intention to recommend is significantly stronger than in generalist NGOs, making sure that volunteers are satisfied becomes a priority in this type of NGO. In this regard, satisfaction studies among volunteers could be conducted periodically to detect crisis situations and implement improvement actions to recover satisfaction in the occupied position. Originality/value First, to date, the motivations of the volunteer have been investigated from different disciplines, the self-determination theory (SDT) being an important motivational theory widely used in areas such as social, education and sports psychology. However, there is little research from a marketing approach to understand the background of the motivations of volunteers under this conceptual framework provided by the SDT. Second, there is also a scarcity of literature linking the motivations of a volunteer with the emotions they may feel, ultimately achieving consolidated lasting links with the NGO in which they are integrated. Third, most research on volunteering to date has focused on differentiating volunteers from non-volunteers and understanding the reasons for volunteering. However, the presence of studies on the differences in the motivation of the same according to the type of NGO with which they collaborate has been scarce.

scholarly journals The impact of government support programs for the development of businesses in Chile

2015 ◽  
Vol 53 (8) ◽  
pp. 1736-1754 ◽  
Author(s):  
Christian A. Cancino ◽  
Claudio A. Bonilla ◽  
Marcos Vergara
Keyword(s):  
Treatment Group ◽  
Small Businesses ◽  
Statistical Significance ◽  
Government Support ◽  
Control Group ◽  
Public Programs ◽  
Content Type ◽  
The One ◽  
The Impact ◽  
Practical Implications

Purpose – The purpose of this paper is to analyze the impact on businesses in Chile of the Seed Capital Program (SCP) implemented by Chile’s Technical Cooperation Services. Design/methodology/approach – In order to analyze the impact of this SCP, a counter-factual scenario was used that entailed a combination of the propensity score matching with difference in difference methods. A total of 682 businesses were surveyed (378 in the treatment group and the rest in the control group), 164 of which gave complete responses to the surveys, 89 belonging to the treatment group and 75 to the control group. Findings – The results are mixed. On the one hand, the impact of sales is positive but its statistical significance depends on the model used. With regard to the number of employees, however, the results are positive and statistically significant regardless of the model used. The results also show that participating in the program has no incidence on the probability of later obtaining financing. Research limitations/implications – This study highlights the importance of differentiating between opportunity-driven entrepreneurship programs and necessity-driven entrepreneurship programs. Practical implications – It also suggests improvements in public policy to develop entrepreneurship in small businesses in Chile. These suggestions may also be interesting for other countries facing similar challenges in terms of developing private entrepreneurship as a vehicle to generate economic development. Originality/value – This exploratory work may be interesting to those in charge of designing, implementing and evaluating public programs in support of small- and mid-sized enterprise development.

The impact of the reputation of underwriter and sponsoring representative on IPO underwriting fees

2016 ◽  
Vol 6 (4) ◽  
pp. 342-366 ◽  
Author(s):  
Chao Chen ◽  
Xinrong Wang
Keyword(s):  
Initial Public Offering ◽  
Political Connection ◽  
Content Type ◽  
Underwriting Fees ◽  
The One ◽  
Public Offering ◽  
The Impact ◽  
New Evidence ◽  
Practical Implications

Purpose The purpose of this paper is to analyze the effect of the reputation of underwriters and sponsoring representatives on initial public offering (IPO) underwriting fees, and further investigates the role of ownership and political connection. Design/methodology/approach The methodology includes three models. Model 1 empirically investigates the effect of underwriter’s reputation on underwriting fee. Model 2 studies the effect of sponsoring representative’s reputation on underwriting fee. Model 3 further examines the effect of underwriter’s reputation and sponsoring representative reputation on the underwriting fee controlling for the impact of ultimate controlling ownership and political connection. Findings The study documents that underwriters’ and sponsoring representatives’ reputation can result in reputational premiums. In the IPO of state-owned enterprises (SOEs), the reputation of underwriters and sponsoring representatives does not significantly affect the underwriting fees. In the IPO of non-state-owned enterprises (NSOEs), there is a significantly positive correlation between underwriters’ and sponsoring representatives’ reputation and underwriting fees. Further research results show that, on the one hand, the effect of underwriters’ and sponsoring representatives’ reputation on underwriting fees is not significant in the IPO of NSOEs with political connection. On the other hand, underwriting fees are positively associated with underwriters’ and sponsoring representatives’ reputation in the IPO of NSOEs without political connection. Research limitations/implications The sponsoring representative’s fee is not disclosed separately, which makes it difficult to distinguish the incremental effect from underwriter’s services and reputation. Practical implications NSOEs relative to SOEs are more likely to pay higher underwriting fees for hiring underwriter and sponsoring representative with better reputation during the process of IPO. Social implications The reputation of underwriter and sponsoring representative does not matter to SOEs but does matter to NSOEs. However, NSOEs’ political connection affects underwriter fees. Originality/value This paper provides new evidence of sponsoring representatives’ reputation and political connection on the underwriting fees in the IPO in Chinese SOEs and NSOEs.

Differences in underpricing of A-REIT IPOs and Australian property company IPOs

2016 ◽  
Vol 34 (2) ◽  
pp. 107-115 ◽  
Author(s):  
Bill Dimovski
Keyword(s):  
Stock Market ◽  
Design Methodology ◽  
Content Type ◽  
Factors Influencing ◽  
Time Period ◽  
Property Companies ◽  
The One ◽  
The Impact ◽  
Two Sectors ◽  
Practical Implications

Purpose – A variety of papers have analyzed the underpricing of REIT IPOs or property company IPOs. The purpose of this paper is to compare the two sectors and examines differences in the underpricing of the two types of IPOs. Design/methodology/approach – An OLS regression is used to identify factors influencing the underpricing of A-REIT and property company IPOs from 1994 until 2014. Findings – This study finds that A-REIT IPOs have a significantly lower underpricing on average than Australian property company IPOs. The time taken to list appears to influence the underpricing of both A-REIT IPOs and property company IPOs, in that issues that are filled more quickly have higher underpricing but with the magnitude of the impact being less for A-REITs. The sentiment toward the stock market also appears to impact on the underpricing of A-REIT and property company IPOs again with the magnitude of the impact being less for A-REITs. Practical implications – The paper provides information to new A-REIT and property company issuers, underwriters and investors. Originality/value – The study is the first to compare and examine the differences in the underpricing of both REITs and property companies in the one country over the same time period.

Perceived workplace gender-bias and psychological impact

2019 ◽  
Vol 43 (3/4) ◽  
pp. 339-353 ◽  
Author(s):  
Siham Lekchiri ◽  
Cindy Crowder ◽  
Anna Schnerre ◽  
Barbara A.W. Eversole
Keyword(s):  
Gender Bias ◽  
Critical Incident ◽  
Psychological Impact ◽  
Working Women ◽  
Content Type ◽  
Treatment Bias ◽  
Male Dominated ◽  
The Impact ◽  
Organizational Mechanisms ◽  
Practical Implications

Purpose The purpose of this paper is to explore the experiences of working women in a male-dominated country (Morocco) and unveil the unique challenges and everyday gender-bias they face, the psychological impact of the perceived gender-bias and, finally, identify a variety of coping strategies or combatting mechanisms affecting their motivation and retention in the workplace. Design/methodology/approach Empirical evidence was obtained using a qualitative research method. The Critical Incident Technique (CIT) was used to collect incidents recalled by women in the select institution reflecting their perceptions of their managers’ ineffective behaviors towards them and the impact of these behaviors. The critical incidents were inductively coded, and behavioral statements were derived from the coded data. Findings The qualitative data analysis led them to structure the data according to two theme clusters: The perceived gender-bias behaviors (Covert and evident personal and organizational behaviors) and Psychological impacts resulting from the perceived bias. These behavioral practices included abusive behaviors, unfair treatment, bias and lack of recognition. The psychological impact elements involved decreased productivity, depression, anxiety and low self-esteem. Practical implications Understanding these experiences can facilitate the identification of strategies geared towards the retention of women in the workforce, and Moroccan organizations can develop and implement strategies and policies that are geared towards eliminating gender-bias in the workplace and to retaining and motivating women who remain ambitious to work in male-dominated environments and cultures. Originality/value This paper provides evidence that sufficient organizational mechanisms to support women in male-dominated environments are still unavailable, leaving them to find the proper coping mechanisms to persevere and resist.

How Phillips saw the light

2020 ◽  
Vol 36 (8) ◽  
pp. 29-31
Keyword(s):  
Design Methodology ◽  
Reading Time ◽  
Daily Basis ◽  
Business World ◽  
Content Type ◽  
Freak Show ◽  
The World ◽  
Pertinent Information ◽  
The One ◽  
Practical Implications

Purpose Reviews the latest management developments across the globe and pinpoints practical implications from cutting-edge research and case studies. Design/methodology/approach This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context. Findings The problem with developing a reputation of being something of an oracle in the business world is that all of a sudden, everyone expects you to pull off the trick of interpreting the future on a daily basis. Like a freak show circus act or one-hit wonder pop singer, people expect you to perform when they see you, and they expect you to perform the thing that made you famous, even if it is the one thing in the world you don’t want to do. And when you fail to deliver on these heightened expectations, you are dismissed as a one trick pony, however good that trick is in the first place. Originality/value The briefing saves busy executives and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

Embedding employability within higher education for the profession of policing

2019 ◽  
Vol 9 (3) ◽  
pp. 319-328
Author(s):  
Ian Pepper ◽  
Ruth McGrath
Keyword(s):  
Higher Education ◽  
Design Methodology ◽  
Research Study ◽  
Longitudinal Research ◽  
Evidence Base ◽  
Content Type ◽  
Educational Provision ◽  
Professional Body ◽  
The Impact ◽  
Practical Implications

Purpose The purpose of this paper is to evaluate the impact of an employability module, the College of Policing Certificate in Knowledge of Policing (CKP), on students’ career aspirations, their confidence and wish to join the police along with the appropriateness of the module. This will inform the implementation of employability as part of the College of Policing-managed Police Education Qualifications Framework (PEQF). Design/methodology/approach A three-year longitudinal research study used mixed methods across four points in time to evaluate the impact on students studying the employability module. Findings The research suggests that the employability-focussed CKP was useful as an introduction to policing, it developed interest in the police and enhanced the confidence of learners applying to join. Lessons learnt from the CKP should be considered during the implementation of the PEQF. Research limitations/implications The ability to generalise findings across different groups is limited as other influences may impact on a learner’s confidence and employability. However, the implications for the PEQF curriculum are worthy of consideration. Practical implications As the police service moves towards standardised higher educational provision and evolution of policing as a profession, lessons can be learnt from the CKP with regards to the future employability of graduates. Originality/value Enhancing the employability evidence base, focussing on policing, the research identified aspects which may impact on graduates completing a degree mapped to the PEQF. The research is therefore of value to higher education and the professional body for policing.

Employee emotional displays in the extended service encounter

2019 ◽  
Vol 31 (1) ◽  
pp. 115-136 ◽  
Author(s):  
Magnus Soderlund ◽  
Hanna Berg
Keyword(s):  
Marketing Communications ◽  
Emotional Expressions ◽  
Service Firms ◽  
Still Images ◽  
Content Type ◽  
Emotional Displays ◽  
Service Setting ◽  
Low Levels ◽  
The Impact ◽  
Practical Implications

Purpose The purpose of this paper is to examine the impact of happiness expressed by service firm employees when they are depicted in marketing communications materials, such as printed ads and videos. Design/methodology/approach Two experiments were conducted in a fitness service setting, in which employee display of happiness was manipulated (low vs high). Findings Both experiments showed that expressions of high levels of happiness produced a more positive attitude toward the service employee than expressions of low levels of happiness. Moreover, the impact of the expression of happiness on the evaluation of the employee was mediated by several variables, which suggests that the influence of depicted employees’ emotional expressions can take several routes. Practical implications The results imply that service firms should not only be mindful about which specific employee they select for appearing in marketing communications materials, they should also pay attention to the emotional displays of selected employees. Originality/value The present study contributes to previous research by assessing a set of potential mediators to explain why displays of happiness influence consumers, and by examining these effects in a marketing communications setting in which the customer is exposed to still images or video-based representations of the employee. The present study also focuses explicitly on happiness rather than on smiles.

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