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Article
Publication date: 1 October 2019

Bertha Maya Sopha, Risqika Edni Doni Achsan and Anna Maria Sri Asih

Uneven distribution and mistarget beneficiaries are among problems encountered during post-disaster relief operations in 2010 Mount Merapi eruption. The purpose of this…

Abstract

Purpose

Uneven distribution and mistarget beneficiaries are among problems encountered during post-disaster relief operations in 2010 Mount Merapi eruption. The purpose of this paper is to develop an empirically founded agent-based simulation model addressing the evacuation dynamics and to explore coordination mechanism and other promising strategies during last-mile relief delivery.

Design/methodology/approach

An agent-based model which was specified and parameterized by empirical research (interviews and survey) was developed to understand the mechanism of individual decision making underlying the evacuation dynamics. A set of model testing was conducted to evaluate confidence level of the model in representing the evacuation dynamics during post-disaster of 2010 Mount Merapi eruption. Three scenarios of last-mile relief delivery at both strategic and operational levels were examined to evaluate quantitatively the effectiveness of the coordination mechanism and to explore other promising strategies.

Findings

Results indicate that the empirically founded agent-based modeling was able to reproduce the general pattern of observable Internal Displaced Persons based on government records, both at micro and macro levels, with a statistically non-significant difference. Low hazard perception and leader-following behavior which refuses to evacuate are the two factors responsible for late evacuation. Unsurprisingly, coordination through information sharing results in better performance than without coordination. To deal with both uneven distribution and long-term demand fulfillment, coordination among volunteers during aid distribution (at downstream operation) is not sufficient. The downstream coordination should also be accompanied with coordination between aid centers at the upstream operation. Furthermore, the coordination which is combined with other operational strategies, such as clustering strategy, using small-sized trucks and pre-positioning strategy, seems to be promising. It appears that the combined strategy of coordination and clustering strategy performs best among other combined strategies.

Practical implications

The significant role of early evacuation and self-evacuation behavior toward efficient evacuation indicates that human factor (i.e. hazard perception and cultural factor) should be considered in designing evacuation plan. Early warning system through both technology and community empowerment is necessary to support early evacuation. The early warning system should also be accompanied with at least 69 percent of the population performing self-evacuation behavior for the effective evacuation. As information sharing through coordination is necessary to avoid redundant efforts, uneven distribution and eventually to reduce unmet demand, the government can act as a coordinating actor to authorize the operation and mobilize the resources. The combination of coordination and another strategy reducing lead time such as clustering analysis, thus increasing responsiveness, is seemly strategy for efficient and effective last-mile relief distribution.

Originality/value

Literature on coordination is dominated by qualitative approach, which is difficult to evaluate its effectiveness quantitatively. Providing realistic setting of the evacuation dynamics in the course of the 2010 Mount Merapi eruption, the empirically founded agent-based model can be used to understand the factors influencing the evacuation dynamics and subsequently to quantitatively examine coordination mechanisms and other potential strategies toward efficient and effective last-mile relief distribution.

Details

Journal of Humanitarian Logistics and Supply Chain Management, vol. 9 no. 2
Type: Research Article
ISSN: 2042-6747

Keywords

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Article
Publication date: 10 May 2018

Guo Yi, Jianxu Mao, Yaonan Wang, Hui Zhang and Zhiqiang Miao

The purpose of this paper is to consider the leader-following formation control problem for nonholonomic vehicles based on a novel biologically inspired neurodynamics approach.

Abstract

Purpose

The purpose of this paper is to consider the leader-following formation control problem for nonholonomic vehicles based on a novel biologically inspired neurodynamics approach.

Design/methodology/approach

The interactions among the networked multi-vehicle system is modeled by an undirected graph. First, a distributed estimation law is proposed for each follower vehicle to estimate the state including the position, orientation and linear velocity of the leader. Then, a distributed formation tracking control law is designed based on the estimated state of the leader, where a bio-inspired neural dynamic is introduced to solve the impractical velocity jumps problem. Explicit stability and convergence analyses are presented using Lyapunov tools.

Findings

The effectiveness and efficiency of the proposed control law are demonstrated by numerical simulations and physical vehicle experiments. Consequently, the proposed protocol can successfully achieve the desired formation under connected topologies while tracking the trajectory generated by the leader.

Originality/value

This paper proposes a neurodynamics-based leader–follower formation tracking algorithm for multiple nonholonomic vehicles.

Details

Assembly Automation, vol. 38 no. 5
Type: Research Article
ISSN: 0144-5154

Keywords

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Article
Publication date: 5 March 2018

Suhaib Masroor and Chen Peng

This paper aims to provide a new approach to address the problem of reaching the synchronous speed in the network connected multiple motors.

Abstract

Purpose

This paper aims to provide a new approach to address the problem of reaching the synchronous speed in the network connected multiple motors.

Design/methodology/approach

Practically, all the control approaches require continuous monitoring of the system thereby consuming extra energy. The method proposed in this paper uses an event-based approach with the multi-agent system (MAS) consensus control alongside with linear quadratic regulator control, thus saving a larger amount of energy. The proposed system is developed by using non-inverting buck boost chopper to provide necessary electrical power for the direct current motor, hence creating a single agent of bigger MAS with identical dynamics. The system stability is formulated by using Lyapunov stability theory. The proposed system is simulated via MATLAB.

Findings

The acquired simulated results validate that the proposed methodology and the multi-motor system worked successfully, thereby achieving common speed, i.e. consensus. The proposed system also validates the energy-saving concept.

Practical implications

Presently, the multiple motor synchronous speed system found application in paper-making machines, textile printing machines, offset printing, etc. The proposed study will contribute greatly to the existing methodologies and overcome their deficiencies by making the system more flexible and error-free due to the presence of network connectivity.

Originality/value

The system is simulated to verify theoretical concepts.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 2
Type: Research Article
ISSN: 0332-1649

Keywords

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Expert briefing
Publication date: 1 October 2015

Mexico's main political parties have announced new leaders but none is likely to rejuvenate their party's fortunes.

Details

DOI: 10.1108/OXAN-DB205673

ISSN: 2633-304X

Keywords

Geographic
Topical
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Expert briefing
Publication date: 14 March 2017

On March 3 the main opposition bloc in the DRC, Le Rassemblement (or the Rally), announced that Tshisekedi, whose UDPS is one of the central groups comprising the Rally…

Details

DOI: 10.1108/OXAN-DB218595

ISSN: 2633-304X

Keywords

Geographic
Topical
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Article
Publication date: 1 August 1975

Under the matrimonial system found in Minangkabau, West Sumatra, when a baby boy is born he is given a name eg Kasim. When he grows up and marries, he is given an…

Abstract

Under the matrimonial system found in Minangkabau, West Sumatra, when a baby boy is born he is given a name eg Kasim. When he grows up and marries, he is given an after‐marriage name termed a Sutan Mudo. (Sutan = Sultan and Mudo = Young). This new name indicates that he is now an adult. His in‐laws use only his after‐marriage name, whilst the older relatives on his mother's side can still use his first name. After‐marriage names also indicate the position in the clan eg the name of an expert in religion usually begins with Tuangku. A leader is known as Datuak. If say a Sutan is appointed as a leader, following the death of such a person, he will henceforth be called Datuak. The Minangkabaus sum it up by saying Keteck Hanamo, Gadang Bagala — children have names, adults have titles.

Details

Education + Training, vol. 17 no. 8
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 April 2006

Paul Lyons

This study seeks to: involve team members in part of the actual design of training for their own team leaders; improve team leader knowledge and skills; and demonstrate…

Abstract

Purpose

This study seeks to: involve team members in part of the actual design of training for their own team leaders; improve team leader knowledge and skills; and demonstrate the use of skill charting (SC) for learning and performance improvement.

Design/methodology/approach

Using focus groups of team members and q‐sort methodology we were able to have team members identify practical performance elements regarding the behavior of their team leaders. Integrating these performance elements into the training design for team leaders and using SC as a training tool, we were able to compare two groups of team leaders: one group (the study group) whose training focused, specifically, on the team‐generated performance elements and another group (the traditional group) whose training was focused on general, team leader performance elements.

Findings

In the perceptions of the team members, the S group team leaders, following training, performed more effectively regarding: response time, positive reinforcement, and focus on desired behavior of team members, than did the T group team leaders. Mean scores of ratings of performance were higher for S group team leaders than T group team leaders on all variables save one.

Research limitations/implications

Owing to the nature of SC training, sample sizes could not be large; that is, sample sizes could not exceed 35 participants per each condition. Statistical tests are thus influenced. Other limitations involve the obvious time gap between actual training and the subsequent changes in behavior and performance. The study does offer considerable support to other research that makes use of SC training tools.

Practical implications

The activities undertaken in the study serve to involve team members, recognize their knowledge and skill, and empower them via decision making and personal recognition.

Originality/value

This study points to ways to involve team members directly in performance improvement and learning.

Details

Team Performance Management: An International Journal, vol. 12 no. 3/4
Type: Research Article
ISSN: 1352-7592

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Article
Publication date: 26 January 2021

David William Stoten

The purpose of this paper is to explore how leadership can better respond to a crisis. It aims to integrate ideas from existentialism into a discussion of how leadership…

Abstract

Purpose

The purpose of this paper is to explore how leadership can better respond to a crisis. It aims to integrate ideas from existentialism into a discussion of how leadership could develop and provoke debate.

Design/methodology/approach

A review of the literature on leadership, crisis management and existentialism was adopted for the preferred research methodology.

Findings

This paper identified a gap in the literature on leadership in an exigency and offered an alternative to the technical-rationalist conceptions of leadership behaviour.

Practical implications

Reference is made to the benefits of counselling for leaders following a crisis.

Originality/value

This paper is an original contribution to the work on leadership. Through the concept of exige-stential leadership, this paper integrates ideas taken from existentialist philosophy, to provide a new way of conceptualising leadership in an exigency.

Details

Leadership & Organization Development Journal, vol. 42 no. 3
Type: Research Article
ISSN: 0143-7739

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Article
Publication date: 1 February 2016

Bryan Finch

– The purpose of this paper is to examine the role played by sport organizations in the community recovery efforts in Boston following the 2013 marathon bombings.

Abstract

Purpose

The purpose of this paper is to examine the role played by sport organizations in the community recovery efforts in Boston following the 2013 marathon bombings.

Design/methodology/approach

Interview questions were created following initial site visits and content analysis of 40 media reports specifically dealing with social recovery efforts following the attacks. Six semi-structured interviews with professional team and organizational leaders were completed and analyzed to gain insight into the leader’s perspectives of the relief process. Finally, the media reports and interviews were reviewed and specific recovery efforts were classified into tangible, emotional, or informational support categories.

Findings

The findings of this case study are specific to the disaster relief efforts in Boston, Massachusetts following the 2013 marathon bombings and therefore cannot be generalized beyond this scope. This paper provided focussed analysis of the reactions of several Boston area sport organizations during the immediate disaster recovery period. The long-term impacts of these efforts require further investigation.

Practical implications

The examination of the viewpoints of the sport organization leaders following the disaster may provide insight for other sport organization leaders and civic officials as they prepare for future challenges.

Originality/value

This paper provides a detailed examination of several sport organizations responses following the community disaster in Boston. It also provides unique perspectives from the sport organization leaders.

Details

Disaster Prevention and Management, vol. 25 no. 1
Type: Research Article
ISSN: 0965-3562

Keywords

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Article
Publication date: 3 May 2011

Mohammad Hadi Amoozgar, Khalil Alipour and Seyed Hossein Sadati

This paper seeks to present a novel approach for formation control of non‐holonomic wheeled mobile robots (WMRs). The use of a general geometrical structure has led the…

Abstract

Purpose

This paper seeks to present a novel approach for formation control of non‐holonomic wheeled mobile robots (WMRs). The use of a general geometrical structure has led the considered robotic team form any desired configuration. Although various methodologies have been suggested for solving such formation control problem in the literature, the proposed kinematical method of the present investigation has several advantages in terms of its robustness, tracking performance, and superior energy consumption due to the fuzzy logic scheme developed.

Design/methodology/approach

In an attempt to make the follower robot to assume the proper orientation, a new concept is presented which defines an appropriate heading angle. This concept is based on the natural human behavior as corresponds to situations of tracking a certain trajectory. The proposed heading angle planner is based on a two‐stage fuzzy logic system, providing appropriate heading angles for the mobile robot at each instant. In order to adjust the linear/angular velocity of the robots then, two further fuzzy controllers are devised.

Findings

The results obtained from the computer simulation studies reveal the merits as well as effectiveness of the proposed method for formation control of a group of WMRs in the presence of usual control input constraints, noisy sensor data, and external disturbances.

Originality/value

A novel method based on a fuzzy leader‐follower method is presented for the formation control of a group of robots.

Details

Industrial Robot: An International Journal, vol. 38 no. 3
Type: Research Article
ISSN: 0143-991X

Keywords

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