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Article
Publication date: 13 September 2022

Mariusz Szóstak, Tomasz Nowobilski, Abdul-Majeed Mahamadu and David Caparrós Pérez

Unmanned aerial vehicles (UAV), colloquially called drones, are widely applied in many sectors of the economy, including the construction industry. They are used for…

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Abstract

Purpose

Unmanned aerial vehicles (UAV), colloquially called drones, are widely applied in many sectors of the economy, including the construction industry. They are used for building inspections, damage assessment, land measurements, safety inspections, monitoring the progress of works, and others.

Design/methodology/approach

The study notes that UAV pose new, and not yet present, risks in the construction industry. New threats arise, among others, from the development of new technologies, as well as from the continuous automation and robotization of the construction industry. Education regarding the safe use of UAV and the proper use of drones has a chance to improve the safety of work when using these devices.

Findings

The procedure (protocol) was developed for the correct and safe preparation and planning of an unmanned aerial vehicle flight during construction operations.

Originality/value

Based on the analysis of available sources, no such complete procedure has yet been developed for the correct, i.e. compliant with applicable legal regulations and occupational health and safety issues, preparation for flying UAV. The verification and validation of the developed flight protocol was performed on a sample of over 100 different flight operations.

Details

International Journal of Intelligent Unmanned Systems, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2049-6427

Keywords

Article
Publication date: 24 August 2022

Amir Khiabani, Alireza Rashidi Komijan, Vahidreza Ghezavati and Hadi Mohammadi Bidhandi

Airline scheduling is an extremely complex process. Moreover, disruption in a single flight may damage the entire schedule tremendously. Using an efficient recovery…

Abstract

Purpose

Airline scheduling is an extremely complex process. Moreover, disruption in a single flight may damage the entire schedule tremendously. Using an efficient recovery scheduling strategy is vital for a commercial airline. The purpose of this paper is to present an integrated aircraft and crew recovery plans to reduce delay and prevent delay propagation on airline schedule with the minimum cost.

Design/methodology/approach

A mixed-integer linear programming model is proposed to formulate an integrated aircraft and crew recovery problem. The main contribution of the model is that recovery model is formulated based on individual flight legs instead of strings. This leads to a more accurate schedule and better solution. Also, some important issues such as crew swapping, reassignment of aircraft to other flights as well as ground and sit time requirements are considered in the model. Benders’ decomposition approach is used to solve the proposed model.

Findings

The model performance is also tested by a case including 227 flights, 64 crew, 56 aircraft and 40 different airports from American Airlines data for a 24-h horizon. The solution achieved the minimum cost value in 35 min. The results show that the model has a great performance to recover the entire schedule when disruption happens for random flights and propagation delay is successfully limited.

Originality/value

The authors confirm that this is an original paper and has not been published or under consideration in any other journal.

Details

Journal of Modelling in Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1746-5664

Keywords

Article
Publication date: 25 September 2009

H. Murat Afsar, Marie‐Laure Espinouse and Bernard Penz

The purpose of this paper is to provide some heuristic and meta heuristic tools to aid airline companies in flight planning while taking into account maintenance planning…

Abstract

Purpose

The purpose of this paper is to provide some heuristic and meta heuristic tools to aid airline companies in flight planning while taking into account maintenance planning. The objective is to maximize aircraft utilization before the maintenance interventions and to smooth the long‐term flight load of the aircraft so that maintenance checks are regular for all the fleet.

Design/methodology/approach

The proposed methods, based on operational research solution technics, build a flight planning for an airline company. The simulation of the proposed methods is observed over 40 weeks and evaluated with different problem instances and maintenance policies.

Findings

The longest path based method with increasing priority and the simulated annealing are shown to have the best aircraft utilization results.

Research limitations/implications

Further research could propose some methods which build simultaneous maintenance and flight planning.

Practical implications

The economic value and legal considerations of maintenance activities in the airline industry show the importance of maximizing aircraft utilization. The proposed methods are compared to decide the best maintenance policy. These methods are simple and efficient.

Originality/value

This paper provides a connection between an industrial problem of aircraft maximization under maintenance constraints and operational research. Simple but efficient methods are evaluated in terms of two criteria: aircraft maximization and flight load smoothing.

Details

Journal of Quality in Maintenance Engineering, vol. 15 no. 4
Type: Research Article
ISSN: 1355-2511

Keywords

Article
Publication date: 31 August 2022

Malik Fahim Bashir, Taimur Khan, Yasir Bin Tariq and Muhammad Akram

This study aims to estimate the magnitude of capital flight from Pakistan. Furthermore, it analyzes the impact of capital flight on the economic growth of Pakistan in the…

Abstract

Purpose

This study aims to estimate the magnitude of capital flight from Pakistan. Furthermore, it analyzes the impact of capital flight on the economic growth of Pakistan in the short and long run.

Design/methodology/approach

This study uses the World Bank’s residual method to estimate the magnitude of capital flight from Pakistan during 1976–2018. This study used the autoregressive distributed lag (ARDL) approach to estimate the effect of capital flight on the economic growth of Pakistan.

Findings

ARDL results revealed a negative and statistically significant relationship between different measures of capital flight and economic growth in the long run. However, this relationship is not statistically significant in the short run. After correction for external borrowing and trade misinvoicing, this study finds that the total capital flight from Pakistan during the study period amounted to US$333bn (in 2010 dollars). With accrued interest earnings, the stock of capital amounted to US$124,768bn, significantly higher than the accumulated stock of long-term debt, which amounted to US$1,231bn during the study period indicating that Pakistan faces a severe challenge of capital flight.

Originality/value

This study calculates the magnitude of capital flight from Pakistan for the first time. Furthermore, this study also calculates the magnitude of capital flight for military and democratic regimes. This study suggests many policy proposals to deal with the challenge of capital flight.

Details

Journal of Money Laundering Control, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1368-5201

Keywords

Article
Publication date: 1 December 2002

Kazimierz Szumański, Jerzy Bereżański and Andrzej Szumański

The results of preliminary tests concerning estimation and widening of helicopter limiting manoeuvre abilities are presented. Research space applies to super‐ and…

1335

Abstract

The results of preliminary tests concerning estimation and widening of helicopter limiting manoeuvre abilities are presented. Research space applies to super‐ and hipermanoeuvrability problems that are especially important for helicopters, because of better manoeuvrability influence on higher safety level and effectiveness in special applications. In airplane engineering, these types of tests are advanced and aerodynamic system improvements are introduced as well as thrust vector control. There are also new manoeuvres recognized for advanced manoevrability airplanes: Cobra, Kulbit, Hook, Bell, Herbst manoeuvre. Although helicopter is “originally” thrust controlled, systematic researches on this field are still not conducted. The paper deals with the problem of helicopter flight mechanics at low flight speeds. The purpose of performed analysis is to achieve possibility of helicopter angular position control within wide range of angular displacements. This is performed by linear and centrifugal acceleration control. Rotor thrust vector control makes those accelerations appear.

Details

Aircraft Engineering and Aerospace Technology, vol. 74 no. 6
Type: Research Article
ISSN: 0002-2667

Keywords

Article
Publication date: 26 July 2022

Hiwa Esmaeilzadeh, Alireza Rashidi Komijan, Hamed Kazemipoor, Mohammad Fallah and Reza Tavakkoli-Moghaddam

The proposed model aims to consider the flying hours as a criterion to initiate maintenance operation. Based on this condition, aircraft must be checked before flying…

Abstract

Purpose

The proposed model aims to consider the flying hours as a criterion to initiate maintenance operation. Based on this condition, aircraft must be checked before flying hours threshold is met. After receiving maintenance service, the model ignores previous flying hours and the aircraft can keep on flying until the threshold value is reached again. Moreover, the model considers aircraft age and efficiency to assign them to flights.

Design/methodology/approach

The aircraft maintenance routing problem (AMRP), as one of the most important problems in the aviation industry, determines the optimal route for each aircraft along with meeting maintenance requirements. This paper presents a bi-objective mixed-integer programming model for AMRP in which several criteria such as aircraft efficiency and ferrying flights are considered.

Findings

As the solution approaches, epsilon-constraint method and a non-dominated sorting genetic algorithm (NSGA-II), including a new initializing algorithm, are used. To verify the efficiency of NSGA-II, 31 test problems in different scales are solved using NSGA-II and GAMS. The results show that the optimality gap in NSGA-II is less than 0.06%. Finally, the model was solved based on real data of American Eagle Airlines extracted from Kaggle datasets.

Originality/value

The authors confirm that it is an original paper, has not been published elsewhere and is not currently under consideration of any other journal.

Details

Journal of Facilities Management , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1472-5967

Keywords

Article
Publication date: 14 June 2022

Jincen Xiao, Jih-Yu Mao and Jing Quan

The airline industry has been one of the hardest-hit industries during the Corona Virus Disease 2019 (COVID-19) pandemic. This study aims to examine which flight

Abstract

Purpose

The airline industry has been one of the hardest-hit industries during the Corona Virus Disease 2019 (COVID-19) pandemic. This study aims to examine which flight attendants are likely to positively reappraise job insecurity and subsequently elevate their performance during the COVID-19 pandemic.

Design/methodology/approach

A two-wave (i.e. Time 1 and Time 2), multi-source (i.e. flight attendants and chief flight attendants) survey was conducted. The final sample consists of 408 flight attendants matched with 57 chief flight attendants. Hierarchical linear modeling was used to test the hypotheses.

Findings

Flight attendants with an organization-centered career orientation are likely to positively reappraise job insecurity and, in turn, have better job performance than those with a self-centered career orientation.

Originality/value

Flight attendants are likely to experience job insecurity during the COVID-19 crisis. This study highlights a potential positive coping mechanism that is contingent upon flight attendants’ career orientations, facilitating the interaction of the stress-coping and vocational literature in a hospitality context.

Details

International Journal of Contemporary Hospitality Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0959-6119

Keywords

Article
Publication date: 22 June 2022

Xiaopeng Liu

To reduce the time of flight rescheduling, reduce the total delay cost of all flights to a minimum and put forward more references for passengers to take flights, this…

Abstract

Purpose

To reduce the time of flight rescheduling, reduce the total delay cost of all flights to a minimum and put forward more references for passengers to take flights, this paper aims to mainly study the recovery of flights affected by snow disaster within the minimum delay time.

Design/methodology/approach

The temporal and spatial network flight recovery model is used to optimize all flights of various types of aircraft, and the adjusted flight schedule based on minute delay time is obtained. In addition, for passenger travel flights, the impact of passenger delay cost on the total delay time is minimized as an objective function to calculate the passenger delay cost.

Findings

In this paper, the actual departure time of aircraft is sorted in ascending order. Up to five planes can take off from the runway every 5 min, and the 10-min decision interval is successively delayed. The actual arrival time is sorted by the same method and the sequential delay is calculated to obtain the adjusted flight schedule. As a result, it takes less time to reschedule flights.

Originality/value

In this paper, heuristic algorithm is used to adjust the schedule of delayed flights flexibly, which is convenient for manual modification. This decision method has good robustness and can partially adjust the interrupted flights without affecting other scheduled flights while maintaining the stable operation of the whole plan, greatly improving the efficiency of civil aviation operations and reducing the impact of flight delays.

Details

Aircraft Engineering and Aerospace Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 17 May 2022

Ozlem Sahin

This paper aims to investigate the effects of descent time spent with flaps extended on fuel burn (FB) and specific range for five different flight path angles (FPAs…

Abstract

Purpose

This paper aims to investigate the effects of descent time spent with flaps extended on fuel burn (FB) and specific range for five different flight path angles (FPAs) ranging between 2.0° and 4.0° for a commercial aircraft.

Design/methodology/approach

A large data set of actual flight data (n = 475) of the same type of a frequently used commercial aircraft were investigated by using statistical methods.

Findings

The result of the comparison of the highest and the lowest FBs of flight profiles for each FPAs present that the fuel saving was achieved by keeping at as a high airspeed as possible and deploying flaps as late as possible, which is in line with the objective of delayed deceleration approaches. From analyzing the flight profiles, it was proven that delaying deceleration and also descending without flaps or with flap over a shorter time resulted in less FB of 101.1, 70.9 and 94.9 kg for FPA 2.5°, FPA 3.0° and FPA 3.5°, respectively.

Originality/value

This study differs from prior studies because it focused on the effects of the different vertical profiles on FB. Also, the use of real flight data recorder data in the analysis presents the originality of this study.

Details

Aircraft Engineering and Aerospace Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1748-8842

Keywords

Abstract

Details

Harnessing the Power of Failure: Using Storytelling and Systems Engineering to Enhance Organizational Learning
Type: Book
ISBN: 978-1-78754-199-3

1 – 10 of over 22000