Browsing by Author "Roy, Rajkumar"

Browsing by Author "Roy, Rajkumar"

Sort by: Order: Results:

  • A study of pulsed thermography for life assessment of thin EB-PVD TBCs undergoing oxidation ageing 
    Tinsley, Lawrence; Chalk, Christine; Nicholls, John R.; Mehnen, Jorn; Roy, Rajkumar (Elsevier, 2017-08-03)
    This paper presents an assessment of ageing for thin Thermal Barrier Coatings (TBC) using active thermography. As TBCs undergo ageing during their service life, sintering changes the porosity, elements migrate from the ...
  • Study of the dependencies between in-service degradation and key design parameters with uncertainty for mechanical components. 
    Kakandar, Ebiakpo (2017-08)
    The design features of machine components can impact significantly in its life while in-service, and only relatively few studies which are case specific have been undertaken with respect to this. Hence, the need for more ...
  • A study on obsolescence resolution profiles 
    Romero Rojo, Francisco Javier; Roy, Rajkumar; Shehab, Essam; Cheruvu, Kalyan (Professional Engineering Publishing, 2012-01-31)
    This paper presents a study assessing the probability of selecting a resolution approach to tackle an obsolescence issue. First, the Delphi method was applied across an industry expert panel to derive a set of 15 obsolescence ...
  • A systematic review of augmented reality applications in maintenance 
    Palmarini, Riccardo; Erkoyuncu, John Ahmet; Roy, Rajkumar; Torabmostaedi, Hosein (Elsevier, 2017-07-11)
    Augmented Reality (AR) technologies for supporting maintenance operations have been an academic research topic for around 50 years now. In the last decade, major progresses have been made and the AR technology is getting ...
  • A systematic review of Augmented Reality content-related techniques for knowledge transfer in maintenance applications 
    Fernández del Amo, Iñigo; Erkoyuncu, John Ahmet; Roy, Rajkumar; Palmarini, Riccardo; Onoufriou, Demetrius (Elsevier, 2018-09-27)
    Augmented Reality (AR) has experienced an increasing trend in applied research in the last few years. This emerging trend is focused in content-related challenges: mainly creation (Authoring), adaptation (Context-Awareness) ...
  • A systematic review of multivariate uncertainty quantification for engineering systems 
    Grenyer, Alex; Erkoyuncu, John Ahmet; Zhao, Yifan; Roy, Rajkumar (Elsevier, 2021-03-31)
    Engineering systems must function effectively whilst maintaining reliability in service. Predicting maintenance costs and asset availability raises varying degrees of uncertainty from multiple sources. Previous reviews in ...
  • Technology selection for human behaviour modelling in contact centres 
    Shah, Satya Ramesh; Roy, Rajkumar; Tiwari, Ashutosh (2006-01-01)
    Customer service advisors can play different roles and have different level of autonomy, but at the end they are humans with heart and voice. While product purchases, lifestyle information and billing data provide important ...
  • Text classification method review 
    Mahinovs, Aigars; Tiwari, Ashutosh; Roy, Rajkumar; Baxter, David (2007-04-01)
    With the explosion of information fuelled by the growth of the World Wide Web it is no longer feasible for a human observer to understand all the data coming in or even classify it into categories. With this growth of ...
  • Through-life Engineering Services 
    Roy, Rajkumar; Shaw, Andy; Erkoyuncu, John Ahmet; Redding, Louis E. (Institute of Measurement & Control, 2013-07-31)
  • Through-life integration using PLM 
    Gomez, M.; Baxter, David; Roy, Rajkumar; Kalta, M. (Cranfield University, 2009-03-31)
    It is widely agreed that organisations would benefit from a PLM implementation founded on a standard structure that integrates through-life information and knowledge. Thus, this paper describes a PLM data structure that ...
  • TOMCAT: An Obsolescence Management Capability Assessment Framework 
    Romero Rojo, Francisco Javier; Baguley, Paul; Shaikh, N.; Roy, Rajkumar; Kelly, S. (Institute of Physics (IoP), 2013-01-22)
    As the UK Ministry of Defence (MoD) moves away from the traditional support contracts to contracting for availability/capability, it is essential that the MoD has confidence in Industry’s capability to manage the risk of ...
  • Ultrasound image filtering and reconstruction using DCT/IDCT filter structure 
    Honarvar Shakibaei Asli, Barmak; Flusser, Jan; Zhao, Yifan; Erkoyuncu, John Ahmet; Krishnan, Kajoli Banerjee; Farrokhi, Yasin; Roy, Rajkumar (IEEE, 2020-07-27)
    In this paper, a new recursive structure based on the convolution model of discrete cosine transform (DCT) for designing of a finite impulse response (FIR) digital filter is proposed. In our derivation, we start with the ...
  • Uncertainty challenges in service cost estimation for product- service systems in the aerospace and defence industries 
    Erkoyuncu, John Ahmet; Roy, Rajkumar; Shehab, Essam; Wardle, P. (Cranfield University Press, 2009-04-01)
    Contracting for availability is expected to become more prevalent for product -service systems (PSS) in the aerospace and defence industries. These contracts tend to transfer responsibilities for the operational phase from ...
  • Work Roll Cooling System Design Optimisation in Presence of Uncertainty 
    Azene, Y. T.; Roy, Rajkumar; Farrugia, Didier; Onisa, C.; Mehnen, Jorn; Trautmann, H. (Cranfield University Press, 2009-03-31)
    The paper presents a framework to optimise the design of work roll based on the cooling performance. The framework develops Meta models from a set of Finite Element Analysis (FEA) of the roll cooling. A design of experiment ...
  • Work roll system optimisation using thermal analysis and genetic algroithm 
    Tafesse Azene, Yoseph (Cranfield University, 2011-05)
    In today‟s highly competitive business environment it is vital to have smart and robust decision making framework for companies to be competitive or even to stay in the business. Profit margin increases is no longer a ...