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Article
Publication date: 24 November 2023

Sezer Çoban

The purpose of this research paper is to recover the autonomous flight performance of a mini unmanned aerial vehicle (UAV) via stochastically optimizing the wing over certain…

Abstract

Purpose

The purpose of this research paper is to recover the autonomous flight performance of a mini unmanned aerial vehicle (UAV) via stochastically optimizing the wing over certain parameters (i.e. wing taper ratio and wing aspect ratio) while there are lower and upper constraints on these redesign parameters.

Design/methodology/approach

A mini UAV is produced in the Iskenderun Technical University (ISTE) Unmanned Aerial Vehicle Laboratory. Its complete wing can vary passively before the flight with respect to the result of the stochastic redesign of the wing while maximizing autonomous flight performance. Flight control system (FCS) parameters (i.e. gains of longitudinal and lateral proportional-integral-derivative controllers) and wing redesign parameters mentioned before are simultaneously designed to maximize autonomous flight performance index using a certain stochastic optimization strategy named as simultaneous perturbation stochastic approximation (SPSA). Found results are used while composing UAV flight simulations.

Findings

Using stochastic redesign of mini UAV and simultaneously designing mini ISTE UAV over previously mentioned wing parameters and FCS, it obtained a maximum UAV autonomous flight performance.

Research limitations/implications

Permission of the directorate general of civil aviation in the Republic of Türkiye is essential for real-time UAV autonomous flights.

Practical implications

Stochastic redesign of mini UAV and simultaneously designing mini ISTE UAV wing parameters and FCS approach is very useful for improving any mini UAV autonomous flight performance cost index.

Social implications

Stochastic redesign of mini UAV and simultaneously designing mini ISTE UAV wing parameters and FCS approach succeeds confidence, highly improved autonomous flight performance cost index and easy service demands of mini UAV operators.

Originality/value

Creating a new approach to recover autonomous flight performance cost index (e.g. satisfying less settling time and less rise time, less overshoot during flight trajectory tracking) of a mini UAV and composing a novel procedure performing simultaneous mini UAV having passively morphing wing over certain parameters while there are upper and lower constraints and FCS design idea.

Article
Publication date: 14 November 2018

Evangelia Baou, Vasilis P. Koutras, Vasileios Zeimpekis and Ioannis Minis

The purpose of this paper is to formulate and solve a new emergency evacuation planning problem. This problem addresses the needs of both able and disabled persons who are…

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Abstract

Purpose

The purpose of this paper is to formulate and solve a new emergency evacuation planning problem. This problem addresses the needs of both able and disabled persons who are evacuated from multiple pick-up locations and transported using a heterogeneous fleet of vehicles.

Design/methodology/approach

The problem is formulated using a mixed integer linear programming model and solved using a heuristic algorithm. The authors analyze the selected heuristic with respect to key parameters and use it to address theoretical and practical case studies.

Findings

Evacuating people with disabilities has a significant impact on total evacuation time, due to increased loading/unloading times. Additionally, increasing the number of large capacity vehicles adapted to transport individuals with disabilities benefits total evacuation time.

Research limitations/implications

The mathematical model is of high complexity and it is not possible to obtain exact solutions in reasonable computational times. The efficiency of the heuristic has not been analyzed with respect to optimality.

Practical implications

Solving the problem by a heuristic provides a fast solution, a requirement in emergency evacuation cases, especially when the state of the theater of the emergency changes dynamically. The parametric analysis of the heuristic provides valuable insights in improving an emergency evacuation system.

Social implications

Efficient population evacuation studied in this work may save lives. This is especially critical for disabled evacuees, the evacuation of whom requires longer operational times.

Originality/value

The authors consider a population that comprises able and disabled individuals, the latter with varying degrees of disability. The authors also consider a heterogeneous fleet of vehicles, which perform multiple trips during the evacuation process.

Details

Journal of Humanitarian Logistics and Supply Chain Management, vol. 8 no. 4
Type: Research Article
ISSN: 2042-6747

Keywords

Open Access
Article
Publication date: 20 July 2020

E.N. Osegi

In this paper, an emerging state-of-the-art machine intelligence technique called the Hierarchical Temporal Memory (HTM) is applied to the task of short-term load forecasting…

Abstract

In this paper, an emerging state-of-the-art machine intelligence technique called the Hierarchical Temporal Memory (HTM) is applied to the task of short-term load forecasting (STLF). A HTM Spatial Pooler (HTM-SP) stage is used to continually form sparse distributed representations (SDRs) from a univariate load time series data, a temporal aggregator is used to transform the SDRs into a sequential bivariate representation space and an overlap classifier makes temporal classifications from the bivariate SDRs through time. The comparative performance of HTM on several daily electrical load time series data including the Eunite competition dataset and the Polish power system dataset from 2002 to 2004 are presented. The robustness performance of HTM is also further validated using hourly load data from three more recent electricity markets. The results obtained from experimenting with the Eunite and Polish dataset indicated that HTM will perform better than the existing techniques reported in the literature. In general, the robustness test also shows that the error distribution performance of the proposed HTM technique is positively skewed for most of the years considered and with kurtosis values mostly lower than a base value of 3 indicating a reasonable level of outlier rejections.

Details

Applied Computing and Informatics, vol. 17 no. 2
Type: Research Article
ISSN: 2634-1964

Keywords

Article
Publication date: 1 February 2008

Pete Hammett

The purpose of this paper is to highlight the paradox of gifted leadership – namely that executives who are gifted in leading their organizations may not be able to develop

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Abstract

Purpose

The purpose of this paper is to highlight the paradox of gifted leadership – namely that executives who are gifted in leading their organizations may not be able to develop leaders under them – creating a challenge in developing the next generation of leaders.

Design/methodology/approach

To help confront this paradox the paper highlights insights for how executives approach developing others by drawing on assessment data from over 100 executive leaders and 900 observers. Additionally, the paper reflects on current research and observations on talent management best practices and offers a call‐to‐action for establishing a leadership development framework.

Findings

Senior leaders do not get too close or too personal with their co‐workers and this isolation can inhibit their ability to identify first hand individuals who might be in the up‐and‐coming next generation of leaders. Likewise, there is a perception that executives are more concerned with advancing their own careers than helping others move up the ladder. Finally, in environments with informal talent management processes, executives can be drawn towards finding and grooming mirror images of themselves or worse may succumb to organizational politics and favoritism when it comes to promotions and advancements.

Originality/value

There are multiple “influencers” that come into play to shape an executive's behavior and perceptions in their struggle to be an effective leader. Hopefully, with a better awareness of these influencers we can bring balance to how we define (and perhaps influence) effective executive leadership.

Details

Industrial and Commercial Training, vol. 40 no. 1
Type: Research Article
ISSN: 0019-7858

Keywords

Article
Publication date: 1 April 1988

David K. Goldstein and Michael H. Zack

This paper examines the impact of information supply and distribution on managerial information processing using a model derived from the organizational information processing…

Abstract

This paper examines the impact of information supply and distribution on managerial information processing using a model derived from the organizational information processing (OIP) framework developed by Daft and Weick. The model suggests that more supply and distribution of information will lead to greater information use and the acquisition of more knowledge, given that the organization's information processing capabilities match its requirements. The model was extended to include the influence of social factors (i.e., culture and power) and the level of knowledge in the organization. Product managers in two consumer goods organizations providing different levels of information technology support were studied to compare the effect of different approaches to supplying and distributing information. The focused comparison case research method was used, in which sites are selected differing only on the dimensions of interest, namely information supply and distribution. The cases provided evidence to support the model. The company which had more data and analytic tools available for its product managers used more information and knew more about the factors that influenced the marketing of its products. In addition, organizational culture and the level of knowledge at the companies affected their approach to information supply, information use, and knowledge acquisition. The results suggest that the effective use of information technology requires a combination of managing the organization culture and fitting the characteristics of information supply and distribution mechanisms to information requirements.

Details

Office Technology and People, vol. 4 no. 4
Type: Research Article
ISSN: 0167-5710

Article
Publication date: 20 November 2009

Jill Manthorpe, Steve Iliffe, Michelle Cornes, Jo Moriarty, Les Bright and Roger Clough

At a time of increasing interest in mental health in later life, the role of public health approaches is potentially heightened. This paper draws on interview data with older…

Abstract

At a time of increasing interest in mental health in later life, the role of public health approaches is potentially heightened. This paper draws on interview data with older people living in London to consider the interplay between personal and public approaches to health and well‐being. The interviews were under taken as part of the midpoint review of the UK government's 10‐year strategy for older people (Healthcare Commission et al, 2006) and the social characteristics of London are considered.

Details

Journal of Public Mental Health, vol. 8 no. 3
Type: Research Article
ISSN: 1746-5729

Keywords

Article
Publication date: 9 April 2024

Yannis Lianopoulos, Nikoleta Kotsi, Thomas Karagiorgos and Nicholas D. Theodorakis

The purpose of the present study was to investigate the interrelationships among the dimensions of sport event experience, event satisfaction and event behavioral intentions.

Abstract

Purpose

The purpose of the present study was to investigate the interrelationships among the dimensions of sport event experience, event satisfaction and event behavioral intentions.

Design/methodology/approach

The sample was comprised of 186 individuals who actively participated in a mass participation sport event. Partial least squares-structural equation modeling (PLS-SEM) was employed to test the relationships among the latent constructs.

Findings

The results indicated that the dimensions of sport event experience predicted 55% of the variance of event satisfaction and 63% of the variance of event behavioral intentions was predicted by sport event experience dimensions and event satisfaction. Specifically, the sensory, affective and relational dimensions of experience sought to have a statistically significant and positive association with event satisfaction, while event satisfaction and the relational dimension of experience were found to have a statistically significant and positive correlation with event behavioral intentions. In addition, event satisfaction was found to mediate the relationships between sensory, affective and relational experiences and event behavioral intentions.

Originality/value

The present study is one of the first that explores the relationships among sport event experience’s dimensions, event satisfaction and positive behavioral intentions in the context of sport event participation.

Details

International Journal of Event and Festival Management, vol. 15 no. 2
Type: Research Article
ISSN: 1758-2954

Keywords

Article
Publication date: 7 June 2019

Eileen Fischer

The aim of this paper is to provide an advanced understanding of the dynamics of a scholarly career.

Abstract

Purpose

The aim of this paper is to provide an advanced understanding of the dynamics of a scholarly career.

Design/methodology/approach

An assemblage of a theoretic lens was adopted to help make sense of how the focal scholar came to have certain capacities and characteristics and how these evolved over time.

Findings

The critical determinants of the capacities of this scholar have arisen from intersections with the institutions she has been a part of and individuals with whom she has been privileged to interact.

Originality/value

This paper is the first to adapt an assemblage theoretic lens to make sense of a professional’s career accomplishments and trajectory and to draw inferences for career management from this perspective.

Details

Journal of Historical Research in Marketing, vol. 11 no. 1
Type: Research Article
ISSN: 1755-750X

Keywords

Article
Publication date: 20 January 2012

Pamela A. Kennett‐Hensel, Julie Z. Sneath and Russell Lacey

This study seeks to examine how event‐induced outcomes impact consumption attitudes and buying behavior by surveying victims at distinct intervals following Hurricane Katrina, the…

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Abstract

Purpose

This study seeks to examine how event‐induced outcomes impact consumption attitudes and buying behavior by surveying victims at distinct intervals following Hurricane Katrina, the largest natural disaster in US history.

Design/methodology/approach

Using van Gennep's liminal transitions framework and Belk's conceptualization of possessions and sense of self, the authors present findings from three studies: depth interviews of 21 victims conducted eight weeks after the storm; an online study of 427 victims that was conducted eight months following the storm; and a follow‐up online study of 176 victims that took place three years after the first online survey.

Findings

The results suggest that when significant life transitions occur, consumption behavior helps to facilitate the process and serves as a marker for each stage.

Research limitations/implications

Because many of the US Gulf Coast region's residents still struggle to cope with the devastation wrought by the storm, the situation offers a unique opportunity to investigate short‐ and long‐term effects of a single catastrophic event on consumers' view of possessions and subsequent consumption behavior.

Practical implications

The studies conducted by the researchers provide insight about the impact of stress and loss on natural disaster victim's purchasing behavior, both in the weeks and months following the storm as well as more than three years later.

Originality/value

The study explores the role of consumption in coping and recovery after a natural catastrophic event. It uses a historic US natural disaster to examine how emotional distress and associated loss of possessions have impacted victims' lives, attitudes, and buying behaviors.

Details

Journal of Consumer Marketing, vol. 29 no. 1
Type: Research Article
ISSN: 0736-3761

Keywords

Article
Publication date: 1 March 1944

EVERYTHING in the library world at the present moment is influenced by the uncertainty of the war situation. This note has run through our editorial comments for many months past…

Abstract

EVERYTHING in the library world at the present moment is influenced by the uncertainty of the war situation. This note has run through our editorial comments for many months past, and as the spring of 1944 approaches it becomes even more insistent. The resumption of the bombing of London by the Luftwaffe, although some papers minimize it on the grounds that it will achieve no military decision, is nevertheless sufficiently disturbing to interfere with the immediate prospects of libraries there. It is difficult to arrange any of those extra activities— lectures, reading circles and the like—which gave a certain liveliness to London libraries, while there is prospect of an evening siren. Most libraries, however, are continuing their ordinary work at a higher pressure than they have known even in peace‐time, or at any rate their issues are maintained week after week at the best peace level.

Details

New Library World, vol. 46 no. 8
Type: Research Article
ISSN: 0307-4803

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