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Article
Publication date: 3 October 2016

Ilker Murat Koc, Semuel Franko and Can Ozsoy

The purpose of this paper is to investigate the stability of a small scale six-degree-of-freedom nonlinear helicopter model at translator velocities and angular…

Abstract

Purpose

The purpose of this paper is to investigate the stability of a small scale six-degree-of-freedom nonlinear helicopter model at translator velocities and angular displacements while it is transiting to hover with different initial conditions.

Design/methodology/approach

In this study, model predictive controller and linear quadratic regulator are designed and compared within each other for the stabilization of the open loop unstable nonlinear helicopter model.

Findings

This study shows that the helicopter is able to reach to the desired target with good robustness, low control effort and small steady-state error under disturbances such as parameter uncertainties, mistuned controller.

Originality/value

The purpose of using model predictive control for three axes of the autopilot is to decrease the control effort and to make the close-loop system insensitive against modeling uncertainties.

Details

Aircraft Engineering and Aerospace Technology, vol. 88 no. 6
Type: Research Article
ISSN: 1748-8842

Keywords

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Book part
Publication date: 30 July 2018

Abstract

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Marketing Management in Turkey
Type: Book
ISBN: 978-1-78714-558-0

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Book part
Publication date: 7 January 2019

Frederick J. Brigham, John William McKenna, Carlos E. Lavin, Murat Koc, Lindsay Watkins and Michele M. Brigham

This chapter reviews recent research regarding behavior interventions for young children. We first consider the implications of allowing maladaptive behavior to remain…

Abstract

This chapter reviews recent research regarding behavior interventions for young children. We first consider the implications of allowing maladaptive behavior to remain untreated in young children. The reasons that people may select for inaction are illustrated through a case example of an individual who manifested behavior problems that were allowed to continue through accommodations rather than being addressed through interventions. We then consider several examples of promising behavior interventions for very young children that can be carried out in home and preschool environments. Next, we review promising interventions that are appropriate for school-based settings. We conclude with the observation that while it is absolutely necessary to deal with urgent situations evoked by maladaptive behavior, it is critical to keep sight of the goal that we should always work to promote more mature, self-regulated, and acceptable behaviors across settings.

Details

Special Education for Young Learners with Disabilities
Type: Book
ISBN: 978-1-78756-041-3

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Book part
Publication date: 7 January 2019

Abstract

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Special Education for Young Learners with Disabilities
Type: Book
ISBN: 978-1-78756-041-3

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Article
Publication date: 7 January 2021

Femi Thomas and Mija Salomi Johnson

This paper aims to propose output feedback-based control algorithms for the flight control system of a scaled, un-crewed helicopter in its hover flight mode.

Abstract

Purpose

This paper aims to propose output feedback-based control algorithms for the flight control system of a scaled, un-crewed helicopter in its hover flight mode.

Design/methodology/approach

The proposed control schemes are based on H control and composite nonlinear control. The gains of the output feedback controllers are obtained as the solution of a set of linear matrix inequalities (LMIs).

Findings

In the proposed schemes, the finite-time convergence of system states to trim condition is achieved with minimum deviation from the steady-state. As the proposed composite nonlinear output feedback design improves the transient response, it is well suited for a scaled helicopter flight. The use of measured output vector instead of the state vector or its estimate for feedback provides a simple control structure and eliminates the need for an observer in real-time application. The proposed control strategies are relevant to situations in which a simple controller is essential due to economic factors, reliability and hardware implementation constraints.

Practical implications

The proposed control strategies are relevant to situations in which a simple controller is essential due to economic factors, reliability and hardware implementation constraints. They also have significance in applications where the number of measurement quantities needs to be minimized such as in a fully functional rotor-craft unmanned aerial vehicle.

Social implications

The developed output feedback control algorithms can be used in small-scale helicopters for numerous civilian and military applications.

Originality/value

This work addresses the LMI-based formulation and solution of an output feedback controller for a hovering un-crewed helicopter. The stability and robustness of the closed-loop system are proved mathematically and the performance of the proposed schemes is compared with an existing strategy via simulation studies.

Details

Aircraft Engineering and Aerospace Technology, vol. 93 no. 1
Type: Research Article
ISSN: 1748-8842

Keywords

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Book part
Publication date: 30 July 2018

Eda Aylin Genc and Metehan Igneci

The introduction of consumer products can be traced back to the invention of the wheel, and after the first invention, humankind discovered that what can be consumable is…

Abstract

The introduction of consumer products can be traced back to the invention of the wheel, and after the first invention, humankind discovered that what can be consumable is marketable. Therefore, it is safe to suggest that the development of marketing, in thought and practice, has always been hand-in-hand with the evolution of humankind. Modern Turkey or Anatolia, one of the cradles of civilisation located in the Fertile Crescent or, in other words, Old Mesopotamia, has always been the centre of trade and marketing. As an emerging economy, Turkey has a lot to combine the ways of western practices with market dynamics unique to her, whereas authors find the development of marketing practices in Turkey exceptionally interesting. Therefore, this chapter aims to provide an insight and a brief history regarding the development of the Turkish marketing context throughout the years. We believe that this contribution will be helpful to those who are interested in the development of marketing in an emerging economy in an academic fashion, as well as for those who are attracted to follow the footprints of the modern era’s business environment.

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Article
Publication date: 20 March 2017

Murat Akpinar, Özge Can and Melike Mermercioglu

This study aims to test the emerald model on the regional basis for the identification of the most important sources of competitiveness in the states of the US.

Abstract

Purpose

This study aims to test the emerald model on the regional basis for the identification of the most important sources of competitiveness in the states of the US.

Design/methodology/approach

Using the emerald model and its assertions, data are collected over the period 1998-2013 from 47 states in the US. Multiple regression analysis is performed with a lag structure of four, six and eight years as alternative time intervals to explain the dependent variable.

Findings

The empirical results support the emerald model except for its R&D attractiveness dimension in its ability to explain competitiveness in the states of the US. In the longer term (eight-year lag), cluster attractiveness has the highest impact, followed by environmental attractiveness, ownership attractiveness, educational attractiveness and talent attractiveness. Comparison of regression models with different time lags indicates that once the very early phase is over, the impacts of most attractiveness dimensions become rather consistent across time and do not disappear.

Originality/value

The study contributes to the literature on the measurement of regional competitiveness by performing an overall assessment of the emerald model and by analyzing the impacts of the model’s dimensions on competitiveness over time. On the other hand, the identification of the sources of regional competitiveness paves the way for a more efficient allocation of resources regarding policies and improvement programs.

Details

Competitiveness Review: An International Business Journal, vol. 27 no. 2
Type: Research Article
ISSN: 1059-5422

Keywords

Content available
Article
Publication date: 25 April 2018

Alper Ozun, Hasan Murat Ertugrul and Yener Coskun

The purpose of this paper is to introduce an empirical model for house price spillovers between real estate markets. The model is presented by using data from the US-UK…

Abstract

Purpose

The purpose of this paper is to introduce an empirical model for house price spillovers between real estate markets. The model is presented by using data from the US-UK and London-New York housing markets over a period of 1975Q1-2016Q1 by employing both static and dynamic methodologies.

Design/methodology/approach

The research analyzes long-run static and dynamic spillover elasticity coefficients by employing three methods, namely, autoregressive distributed lag, the fully modified ordinary least square and dynamic ordinary least squares estimator under a Kalman filter approach. The empirical method also investigates dynamic correlation between the house prices by employing the dynamic control correlation method.

Findings

The paper shows how a dynamic spillover pricing analysis can be applied between real estate markets. On the empirical side, the results show that country-level causality in housing prices is running from the USA to UK, whereas city-level causality is running from London to New York. The model outcomes suggest that real estate portfolios involving US and UK assets require a dynamic risk management approach.

Research limitations/implications

One of the findings is that the dynamic conditional correlation between the US and the UK housing prices is broken during the crisis period. The paper does not discuss the reasons for that break, which requires further empirical tests by applying Markov switching regime shifts. The timing of the causality between the house prices is not empirically tested. It can be examined empirically by applying methods such as wavelets.

Practical implications

The authors observed a unidirectional causality from London to New York house prices, which is opposite to the aggregate country-level causality direction. This supports London’s specific power in the real estate markets. London has a leading role in the global urban economies residential housing markets and the behavior of its housing prices has a statistically significant causality impact on the house prices of New York City.

Social implications

The house price co-integration observed in this research at both country and city levels should be interpreted as a continuity of real estate and financial integration in practice.

Originality/value

The paper is the first research which applies a dynamic spillover analysis to examine the causality between housing prices in real estate markets. It also provides a long-term empirical evidence for a dynamic causal relationship for the global housing markets.

Details

Journal of Capital Markets Studies, vol. 2 no. 1
Type: Research Article
ISSN: 2514-4774

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Book part
Publication date: 21 May 2021

Murat Güreşci

Introduction: Nowadays, corporate social responsibility (CSR) activities carried out by companies to create a positive corporate image and a good reputation on target…

Abstract

Introduction: Nowadays, corporate social responsibility (CSR) activities carried out by companies to create a positive corporate image and a good reputation on target audiences have lost their credibility. Target audiences perceive these companies as “doing as if they are doing” CSR activities. It is effective for companies to carry out works that put them in a good light, cover the back of the showcase, make their ways appealing, cover some facts, polish their image, and carry out works that do not aim to create value or benefit.

Purpose: The purpose of this study is to reveal that the intellectual company model is an alternative model to CSR studies.

Methodology: This study consists of two parts. The first part will focus on CSR understanding and will be handled with a critical perspective; the second part will discuss, through a theoretical framework, the concept of the intellectual company for sustainable economic, environmental and social development and the intellectual company will be examined.

Findings: The results of the study are as follows. (i) It was determined that the intellectual company made sustainable contributions on economic, social, and environmental issues. (ii) Sustainability is central to the intellectual company’s work on social and environmental issues. The intellectual company model is an alternative model to CSR studies. The intellectual company will make more positive contributions to social and environmental issues as it focuses on sustainability. This will affect consumer trust positively and increase brand loyalty.

Details

New Challenges for Future Sustainability and Wellbeing
Type: Book
ISBN: 978-1-80043-969-6

Keywords

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Article
Publication date: 1 November 2003

Murat Kasimoglu and Bahattin Hamarat

Competition and attempts to increase market share between organizations play an important role in business ecology. It has been determined that intensity in the…

Abstract

Competition and attempts to increase market share between organizations play an important role in business ecology. It has been determined that intensity in the institutions and death among organizations especially are of great importance. Intensity and homogeny among the organizational population are very important in the evolutionary process for them to create modern forms of institution. We have used parametric variables to collect a set of data in order to understand competition and niche among organization population. The study investigates how competition and niche affect the cluster of hotel population and their survivability. The founding of each hotel organization is differently constructed internally and different segments of the hotel population respond heterogeneously to the general process of competition. The findings show how niche and different segments of hotel population affect new organizational establishment and the evolutionary dynamics of modern organization structure, using the city center hotels of Canakkale in Turkey.

Details

Management Research News, vol. 26 no. 8
Type: Research Article
ISSN: 0140-9174

Keywords

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