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1 – 10 of over 482000

Abstract

Details

The Electronic Library, vol. 21 no. 3
Type: Research Article
ISSN: 0264-0473

Keywords

Article
Publication date: 1 May 2002

Stuart James

79

Abstract

Details

Reference Reviews, vol. 16 no. 5
Type: Research Article
ISSN: 0950-4125

Keywords

Article
Publication date: 2 January 2018

Kamil Krasuski, Damian Wierzbicki and Henryk Jafernik

The purpose of this paper is to study the implementation of GNSS technique in aviation for recovery of aircraft’s position using Precise Point Positioning (PPP) method.

Abstract

Purpose

The purpose of this paper is to study the implementation of GNSS technique in aviation for recovery of aircraft’s position using Precise Point Positioning (PPP) method.

Design/methodology/approach

The aircraft’s coordinates in ellipsoidal frame were obtained based on GPS code and phase observations for PPP method. The numerical computations were executed in post-processing mode in the CSRS-PPP and magicPPP online services. The mathematical scheme of PPP method was development using indifference equations of Ionosphere-Free linear combination. In the experiment, airborne test using Cessna 172 aircraft on June 01, 2010 in the military airport in Deblin was realized. The aircraft’s position was determined using data from GNSS receiver (Topcon HiperPro with interval of 1 s).

Findings

In this paper, the accuracy of aircraft’s position is better than 0.07 m for CSRS-PPP service and better than 0.27 m for magicPPP service. In case of the Mean Radial Spherical Error parameter, the average value for CSRS-PPP service equals to 0.01 m, whereas for magicPPP, it is about 0.38 m. The values of vertical coordinate of Cessna 172 aircraft were also checked with results of Real Time Kinematic–On The Fly technique.

Research limitations/implications

In this paper, the analysis of aircraft positioning is focused on the application of the PPP method in post-processing mode. In near real time, the PPP method still has limitations, especially in the area of ambiguity resolution and also instrumental biases (e.g. Narrow Lane Hardware Delays).

Practical implications

The PPP method can be applied in aviation in post-processing mode for verification of true aircraft coordinates and elimination of blunder errors from adjustment processing of GNSS observations. The Zenith Wet Delay term as a product of troposphere delay and receiver clock bias as a product of precise time transfer can be obtained in the PPP method.

Originality/value

The paper presents that the PPP method is an alternative solution for the recovery of aircraft’s position in aviation, and this method can be also applied in the positioning of aircraft based on GLONASS or GPS/GLONASS data.

Details

Aircraft Engineering and Aerospace Technology, vol. 90 no. 1
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 1 March 2001

Marianne Tremaine

758

Abstract

Details

Women in Management Review, vol. 16 no. 2
Type: Research Article
ISSN: 0964-9425

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Article
Publication date: 20 April 2010

Janice M. Bogstad

543

Abstract

Details

Collection Building, vol. 29 no. 2
Type: Research Article
ISSN: 0160-4953

Keywords

Abstract

Details

International Marketing Review, vol. 20 no. 2
Type: Research Article
ISSN: 0265-1335

Keywords

Article
Publication date: 9 May 2022

Yanhong Yan, Xiaocui Yan, Chengwen Yang, Yanfei Zhou, Zhining Jia and Caizhe Hao

The purpose of this study is to improve the dispersion of nanoserpentine modified with OA, KH550 and KH550/oleic acid in lubricating oil. The main aims are to analyze the…

Abstract

Purpose

The purpose of this study is to improve the dispersion of nanoserpentine modified with OA, KH550 and KH550/oleic acid in lubricating oil. The main aims are to analyze the influence of the dispersion and stability of nanoserpentine modified by different modifiers on the friction properties of lubricating oil.

Design/methodology/approach

The nanoserpentine particles obtained by ball-milling were modified by silane coupling agent KH550, OA and KH550/OA, respectively. The dispersity and stability of nanoserpentine in base lubricating oil were characterized by the absorbance value method, centrifuge precipitation rate method and static observation method. The MMU-5G screen display friction and wear tester was used to evaluate the tribological properties of C45E4/C45E4 friction pairs in corresponding lubricating oils. The surface morphology of the friction pairs was observed by scanning electron microscopy and energy dispersive spectroscopy.

Findings

The results showed that the dispersity and stability of nanoserpentine particles in lubricating oil were best modified by OA, followed by the KH550/OA and finally, the KH550. Nanoserpentine particles modified with oleic acid showed optimum tribological properties as lubricant additives.

Originality/value

This study can improve the dispersion stability of nanoserpentine particles in lubricating oil, increasing the antiwear and antifriction performance of lubricating oil, which has great significance in economic and military aspects.

Details

Industrial Lubrication and Tribology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 4 May 2022

Paul Makin and Lisa Ogilvie

The purpose of this paper is to contribute to a series of recovery stories that examine candid accounts of addiction and recovery. Shared components in the recovery…

Abstract

Purpose

The purpose of this paper is to contribute to a series of recovery stories that examine candid accounts of addiction and recovery. Shared components in the recovery process are considered, along with the change and growth needed to support the transition from addiction to recovery.

Design/methodology/approach

The connectedness, hope, identity, meaning in life and empowerment (CHIME) framework comprises five elements important to recovery. CHIME provides a standard to qualitatively study recovery. As a model, it has been extended to include growth-CHIME (G-CHIME), an element that is important for sustained addiction recovery. In this paper, a first-hand account of addiction recovery is presented, followed by a semi-structured e-interview with the author of the account that is based on the G-CHIME model.

Findings

This paper shows that addiction recovery is a remarkable process that can be effectually explained using the G-CHIME model. The significance of each element in the model is apparent from the biography and e-interview presented.

Originality/value

To the best of the authors’ knowledge, each account of recovery in this series is unique and, as yet, untold.

Details

Advances in Dual Diagnosis, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1757-0972

Keywords

Article
Publication date: 9 May 2022

Robert Bogue

This paper aims to provide an insight into recent developments in the robotic exoskeleton business by considering research, corporate activities, products and emerging…

Abstract

Purpose

This paper aims to provide an insight into recent developments in the robotic exoskeleton business by considering research, corporate activities, products and emerging applications.

Design/methodology/approach

Following a short introduction, this first provides examples of exoskeleton research involving artificial intelligence (AI). It then identifies recent market entrants and their products and discusses emerging industrial applications. Finally, conclusions are drawn.

Findings

The exoskeleton business is in a highly dynamic state. A research effort involving AI techniques seeks to impart exoskeletons with greatly enhanced capabilities, particularly in clinical applications. Many new companies have been established during the past decade, and several are exploiting academic research. The majority are targeting applications in the clinical market. The industrial sector is viewed as a key growth area, but applications remain limited, although some exist for robotic gloves, upper-body, waist and lower-body devices in the logistics, construction, automotive and other industries. Industrial applications for full-body exoskeleton are yet to progress beyond the trial stage.

Originality/value

This provides details of recent academic and corporate developments and emerging industrial applications in the robotic exoskeleton business.

Details

Industrial Robot: the international journal of robotics research and application, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 18 May 2022

Hiroki Shigematsu, Shinji Wakao, Hiroaki Makino, Katsutoku Takeuchi and Makoto Matsushita

This paper aims to further improve the efficiency of multi-objective optimization design of synchronous reluctance motors (SynRMs) using the level set (LS) method, which…

Abstract

Purpose

This paper aims to further improve the efficiency of multi-objective optimization design of synchronous reluctance motors (SynRMs) using the level set (LS) method, which has the advantage of obtaining a practical shape. The solutions obtained by gradient methods tend to be local ones due to the multi-modality of the objective function, especially when multiple objective functions. A huge number of trial calculations are required to obtain a high-quality and broadly distributed Pareto front. Therefore, it is indispensable to effectively get out of the local solutions in the optimization process with the LS method.

Design/methodology/approach

The authors propose a novel method appropriately switching multiple objective functions with high independence of sensitivity information. The authors adopt highly independent mathematical expressions for the objective functions of the average torque and torque ripple. In addition, the authors repeatedly perform the optimization while appropriately selecting the sensitivity information of one objective function from multiple ones, which enables the authors to effectively break out of local solutions in the optimization process.

Findings

The proposed method was applied to the shape optimization of SynRM flux barriers and successfully searched a more extensive and advanced Pareto front in comparison with the conventional method.

Originality/value

The proposed method adopts search spaces with mathematical high independence for average torque and torque ripple. In the optimization process, when the solution search is judged to get stuck by several criteria, the search space is alternately switched to effectively get out of local solutions.

Details

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

Keywords

1 – 10 of over 482000