An Evaluation of the Impact of Role Congruity and Power Sharing Techniques on Perceived Leadership Effectiveness

2011 ◽  
Vol 5 (3) ◽  
pp. 215-232
Author(s):  
Thomas Aicher ◽  
Heather Samariniotis
Keyword(s):  
Leadership Effectiveness ◽  
Power Sharing ◽  
Role Congruity ◽  
Perceived Leadership ◽  
The Impact

scholarly journals The Impact of Transformational Leadership and Perceived Leadership Effectiveness on Organizational Commitment of Public Sector Workers in Kwara State, Nigeria

2021 ◽  
Vol 10 (1) ◽  
pp. 115-130
Author(s):  
Abdulmumin Yinka Ajia
Keyword(s):  
Transformational Leadership ◽  
Leadership Effectiveness ◽  
Public Institutions ◽  
Research Support ◽  
Leadership Theories ◽  
Organizational Outcome ◽  
Perceived Leadership ◽  
Universal Applicability ◽  
The Impact ◽  
Better Than

The importance of leadership in organizational outcome cannot be overstated. This study showed that perceived leadership effectiveness predicts positive organizational outcome in Nigeria better than transformational leadership when paired together. However, because of its inherent positive attributes, transformational leadership when augmented by leadership effectiveness and practices can make public institutions more effective and efficient in its service delivery and in its response to the citizenry. Findings from this survey research support the general theory that leadership is a major determinant of organizational outcome and supports the universal applicability of transformational leadership theories.

scholarly journals Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power Loads

Mathematics ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 922
Author(s):  
Mohamed Hassan ◽  
Muhammed Worku ◽  
Abdelfattah Eladl ◽  
Mohammed Abido
Keyword(s):  
Dynamic Stability ◽  
Power Sharing ◽  
Constant Power ◽  
Similar Frequency ◽  
Stability Performance ◽  
High Penetration ◽  
Constant Power Loads ◽  
The Time Domain ◽  
And Control ◽  
The Impact

Nowadays, behaving as constant power loads (CPLs), rectifiers and voltage regulators are extensively used in microgrids (MGs). The MG dynamic behavior challenges both stability and control effectiveness in the presence of CPLs. CPLs characteristics such as negative incremental resistance, synchronization, and control loop dynamic with similar frequency range of the inverter disturb severely the MG stability. Additionally, the MG stability problem will be more sophisticated with a high penetration level of CPLs in MGs. The stability analysis becomes more essential especially with high-penetrated CPLs. In this paper, the dynamic stability performance of an MG involving a high penetration level of CPLs is analyzed and investigated. An autonomous MG engaging a number of CPLs and inverter distributed generations (DGs) is modeled and designed using MATLAB. Voltage, current, and power controllers are optimally designed, controlling the inverter DGs output. A power droop controller is implemented to share the output DGs powers. Meanwhile, the current and voltage controllers are employed to control the output voltage and current of all DGs. A phase-locked loop (PLL) is essentially utilized to synchronize the CPLs with the MG. The controller gains of the inverters, CPLs, power sharing control, and PLL are optimally devised using particle swarm optimization (PSO). As a weighted objective function, the error in the DC voltage of the CPL and active power of the DG is minimized in the optimal problem based on the time-domain simulation. Under the presence of high penetrated CPLs, all controllers are coordinately tuned to ensure an enhanced dynamic stability of the MG. The impact of the highly penetrated CPLs on the MG dynamic stability is investigated. To confirm the effectiveness of the proposed technique, different disturbances are applied. The analysis shows that the MG system experiences the instability challenges due to the high penetrated CPLs. The simulation results confirm the effectiveness of the proposed method to improve the MG dynamic stability performance.

The Importance of Similarity: How Gender Congruence Matters for the Impact of Leadership Training

2021 ◽  
pp. 009539972110642
Author(s):  
Trine H. Fjendbo ◽  
Christian B. Jacobsen ◽  
Seung-Ho An
Keyword(s):  
Leadership Training ◽  
Large Scale ◽  
Leadership Behaviors ◽  
Leadership Behavior ◽  
Female Gender ◽  
Perceived Leadership ◽  
Scale Field ◽  
Before And After ◽  
Large Scale Field ◽  
The Impact

Leadership training is key to promoting more active leadership, but the effects of leadership training can depend on the gender context. Gender congruence between manager and employee can affect how the manager employs leadership behaviors adapted from training and how employees perceive leadership behavior. Quantitative data on 474 managers’ 4,833 employees before and after a large-scale field experiment with leadership training enable us to examine changes in employee-perceived leadership following training. The results show that gender congruence between manager and employee is associated with stronger leadership training effects on employee-perceived leadership behaviors. Female gender congruence shows the most pronounced effects.

Hydrogen Fuel Cell and Battery Hybrid Architecture for Range Extension of Electric VTOL (eVTOL) Aircraft

2021 ◽  
Vol 66 (1) ◽  
pp. 1-13
Author(s):  
Wanyi Ng ◽  
Mrinalgouda Patil ◽  
Anubhav Datta
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Power Plant ◽  
Lithium Ion ◽  
Power Sharing ◽  
Hybrid Architecture ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Lift Off ◽  
The Impact

The objective of this paper is to study the impact of combining hydrogen fuel cells with lithium-ion batteries through an ideal power-sharing architecture to mitigate the poor range and endurance of battery powered electric vertical takeoff and landing (eVTOL) aircraft. The benefits of combining the two sources is first illustrated by a conceptual sizing of an electric tiltrotor for an urban air taxi mission of 75 mi cruise and 5 min hover. It is shown that an aircraft of 5000–6000 lb gross weight can carry a practical payload of 500 lb (two to three seats) with present levels of battery specific energy (150 Wh/kg) if only a battery–fuel cell hybrid power plant is used, combined in an ideal power-sharing manner, as long as high burst C-rate batteries are available (4–10 C). A power plant using batteries alone can carry less than half the payload; use of fuel cells alone cannot lift off the ground. Next, the operation of such a system is demonstrated using systematic hardware testing. The concepts of unregulated and regulated power-sharing architectures are described. A regulated architecture that can implement ideal power sharing is built up in a step-by-step manner. It is found only two switches and three DC-to-DC converters are necessary, and if placed appropriately, are sufficient to achieve the desired power flow. Finally, a simple power system model is developed, validated with test data and used to gain fundamental understanding of power sharing.

scholarly journals A Model for Evaluating the Effectiveness of Educational Leadership: The Case of Greece

2020 ◽  
Vol 8 (1) ◽  
pp. 70
Author(s):  
Andreas Dimopoulos
Keyword(s):  
Educational Leadership ◽  
Literature Review ◽  
Leadership Effectiveness ◽  
Academic Staff ◽  
Evaluation Model ◽  
Educational Leaders ◽  
Evaluation Process ◽  
Evaluation Tool ◽  
Local Society ◽  
The Impact

Educational leadership has been studied in depth so far worldwide. However, to our knowledge, there is a broad scope for further research in terms of measuring educational leadership effectiveness. Many attempts throw the years were undergone in Greece in order to establish an evaluation process for educational leadership, many reactions raised, continuous changes have occurred and the issue remains timeless. This study aims to introduce a model of assessing the outcomes of educational leadership considering the most important stake holders that affect. These stake holders according to literature review in broader categories are the academic staff, school community, students, local society, and administrative personnel. Educational leader’s effectiveness can be also assessed against their academic and operational duty results such as the implementation of national educational policy, administrative tasks and relative operational outcomes in budgeting, handling and overcoming managerial obstacles, meeting the legislation standards. The purpose of this research is to design a comprehensive, applicable and holistic evaluation model for assessing educational leadership based on the results on the above criteria. For this purpose an extensive relative literature review in educational leadership studies has been conducted in order to explore in depth the most significant recipients that educational leadership influence and affect direct or indirect respectively. The core idea is that the most influenced recipients by educational leadership could be the most appropriate evaluators for the results of it. Thus has been designed a model based on the most significant stake holders who affected by educational leaders, complimented with a questionnaire as evaluation tool, which is structured with particular questions for each broad category of stake holders. In this study a relative literature review, and a draft of a pilot evaluation model in assessing educational leadership presenting, while the ultimate target is in a following study the evaluation model to be implemented in real sample of participants in order to present the impact of educational leadership effectiveness with respect to subordinates of academic, managerial staff and students of an educational organization.It is of a great importance to have an evaluation model for assessing the educational leadership effectiveness for all levels of education such as primary, secondary and higher education. Educational leaders affect many recipients such as students, faculty members, academics and community. Hence, a broader evaluation model should involve assessment criteria from all these stake holders due to the fact that educational leadership has a great direct or indirect influence in several micro and macroeconomic critical results, such as students achievements, learning outcomes, school climate, local society bonds, teachers behaviours, ethics, culture, civilization, and eventually national economy competiveness. A transparent evaluation model of school leaders could provide better understanding of the job left to be done for every educational leader, to recognise competences, to disclose weaknesses in order to work on them, to facilitate criteria for improvement, overcome obstacles and eventually to promote and improve educational efficiency.

scholarly journals The impact of transformational leadership on organizational and leadership effectiveness

2008 ◽  
Vol 27 (7) ◽  
pp. 708-726 ◽  
Author(s):  
Hakan Erkutlu
Keyword(s):  
Transformational Leadership ◽  
Organizational Commitment ◽  
Hospitality Industry ◽  
Leadership Effectiveness ◽  
Leadership Behaviors ◽  
Future Research ◽  
Line Managers ◽  
Content Type ◽  
Boutique Hotels ◽  
The Impact

PurposeThe purpose of this paper is to examine the influence of leadership behaviors on both organizational and leader effectiveness at boutique hotels.Design/methodology/approachA total of 722 subjects (60 managers and 662 non‐managerial employees) participated in this study from 60 boutique hotels. Participants were told that the study was designed to collect information on the leadership styles used by managers and on the satisfaction and commitment of employees in the hospitality workforce. Multifactor Leadership Questionnaire, Organizational Commitment Questionnaire and Job Descriptive Index were used to assess leadership behaviors of the boutique hotels' first‐line managers and commitment and satisfaction levels of employees, respectively.FindingsThere are significant relations between leadership behaviors and both organizational and leadership effectiveness. The findings support the suggestion in the literature that transformational leadership behaviors stimulate organizational commitment and job satisfaction in the hospitality industry.Research limitations/implicationsThere are several limitations that could be future research topics, such as hotels' source of funding, demographic characteristics of the participants. There is a question about the generalizability of these findings to other hospitality organizations such as four or five‐star hotels.Originality/valueThis paper explores an aspect of leadership in the hospitality industry that is often neglected. It provides compelling evidence for the importance of continuing the efforts to understand the nature of the leadership behaviors‐effectiveness connection.

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