Browsing by Author "Lilley, Mariana"

Now showing items 1-20 of 25

    • Adapting Heuristics for the Mobile Panorama 

      Joyce, Ger; Lilley, Mariana; Barker, Trevor; Jefferies, Amanda (2014)
      Expert-based usability inspection methods are well established; the heuristic method in particular is widely known for being fast, relatively inexpensive and easy to learn. However, traditional heuristics are not easily ...

    • The application of the flexilevel approach for the assessment of computer science undergraduates 

      Lilley, Mariana; Pyper, A. (2009)
      This paper reports on the use of the flexilevel approach for the formative assessment of Computer Science undergraduates. A computerized version of the flexilevel was designed and developed, and its scores were compared ...

    • Computer adaptive assessment and its use in the development of a student model for blended learning 

      Barker, T.; Lilley, Mariana; Britton, C. (2006)
      This paper presents an overview of our work on the--development and testing of an automated feedback tool based on Computer-Adaptive Testing. Computer-adaptive tests (CATs) are software applications that adapt the presentation ...

    • A computer adaptive test that facilitates the modification of previously entered responses : An empirical study 

      Lilley, Mariana; Barker, T. (2004)
      In a computer-adaptive test (CAT), learners are not usually allowed to revise previously entered responses. In this paper, we present findings from our most recent empirical study, which involved two groups of learners and ...

    • Design, Privacy and Authentication of Challenge Questions in Online Examinations 

      Ullah, Abrar; Xiao, Hannan; Lilley, Mariana; Barker, Trevor (IEEE COMPUTER SOC, 2013-12)
      Online examination is an essential part of the online learning and secure authentication is considered vital for the success of online learning. This study is part of an ongoing research on student authentication approaches ...

    • The development and evaluation of a software prototype for computer adaptive testing 

      Lilley, Mariana; Barker, T.; Britton, C. (2004)
      This paper presents ongoing research at the University of Hertfordshire on the use of computer-adaptive tests (CATs) in Higher Education. A software prototype based on Item Response Theory has been developed and is described ...

    • Evaluating Security and Usability of Profile Based Challenge Questions Authentication in Online Examinations 

      Ullah, Abrar; Xiao, Hannan; Barker, Trevor; Lilley, Mariana (2014-03-04)
      Student authentication in online learning environments is an increasingly challenging issue due to the inherent absence of physical interaction with online users and potential security threats to online examinations. This ...

    • Evaluating the impact of changing contexts on mobile application usability within agile environments 

      Joyce, Ger; Lilley, Mariana; Barker, Trevor; Jefferies, Amanda (2016-12-06)
      Mobile applications tend to be used in contexts that change over time. These varying contexts may impact the usability, and potentially the overall user experience, of mobile applications. However, the impact of context ...

    • An evaluation of distance learning programmes through the lens of students’ expectations 

      Clark, Karen; Cubric, Marija; Lilley, Mariana (ACPI (Academic Conference Publishing International), 2012-11)
      As the University of Hertfordshire (UH) moves towards its goal of 15% distance learning by 2015, it has become increasingly important to gain a deeper understanding of the needs and expectations of our growing population ...

    • An exploratory comparative study of distance-learning programmes 

      Cubric, Marija; Clark, Karen; Lilley, Mariana (ACPI (Academic Conference Publishing International), 2011)
      In this paper we describe an exploratory study of distance learning practice. We review five different distance learning programme models from five different schools at the University of Hertfordshire, each varying in ...

    • Improving the MXFT Scheduling Algorithm for a Cloud Computing Context 

      Moggridge, Paul; Helian, Na; Sun, Yi; Lilley, Mariana; Veneziano, Vito; Eaves, Martin (2019-08-09)
      In this paper, the Max-Min Fast Track (MXFT) scheduling algorithm is improved and compared against a selection of popular algorithms. The improved versions of MXFT are called Min-Min Max-Min Fast Track (MMMXFT) and Clustering ...

    • Instance Weighted Clustering: Local Outlier Factor and K-Means 

      Moggridge, Paul; Helian, Na; Sun, Yi; Lilley, Mariana; Veneziano, Vito (Springer Nature, 2020-05-28)
      Clustering is an established unsupervised learning method. Substantial research has been carried out in the area of feature weighting, as well instance selection for clustering. Some work has paid attention to instance ...

    • Measuring staff attitude to an automated feedback system based on a computer adaptive test 

      Barker, T.; Lilley, Mariana (2006)
      In Higher Education today, increasing reliance is being placed upon the use of online learning and assessment systems. Often these are used to manage learning, present information and test learners in an entirely ...

    • Mobile Application Tutorials: Perception of Usefulness from an HCI Expert Perspective 

      Joyce, Ger; Lilley, Mariana; Barker, Trevor; Jefferies, Amanda (Springer Nature, 2016-06-19)
      Mobile application tutorials are an opportunity to educate users about a mobile application. Should a mobile application tutorial not be used, the number of frustrated users and uninstalled applications could increase, ...

    • Mobile application usability heuristics: Decoupling context-of-use 

      Joyce, Ger; Lilley, Mariana; Barker, Trevor; Jefferies, Amanda (Springer Nature, 2017-05-14)
      Context-of-use is a vital consideration when evaluating the usability of mobile applications. Thus, when defining sets of heuristics for the usability evaluation of mobile applications, a common practice has been to include ...

    • Mobile Application Usability: Heuristic Evaluation and Evaluation of Heuristics 

      Joyce, Ger; Lilley, Mariana; Barker, Trevor; Jefferies, Amanda (Springer Nature, 2016-06-30)
      Many traditional usability evaluation methods do not consider mobile-specific issues. This can result in mobile applications that abound in usability issues. We empirically evaluate three sets of usability heuristics for ...

    • On Instance Weighted Clustering Ensembles 

      Moggridge, Paul; Helian, Na; Sun, Yi; Lilley, Mariana (2023-10-04)
      Ensemble clustering is a technique which combines multipleclustering results, and instance weighting is a technique which highlightsimportant instances in a dataset. Both techniques are known to enhanceclustering performance ...

    • Privacy and Usability of Image and Text Based Challenge Questions Authentication in Online Examination 

      Ullah, Abrar; Xiao, Hannan; Lilley, Mariana; Barker, Trevor (IEEE COMPUTER SOC, 2014-09)
      In many online examinations, physical invigilation is often replaced with traditional authentication approaches for student identification. Secure and usable authentication approaches are important for high stake online ...

    • Proceedings of Abstracts Engineering and Computer Science Research Conference 2019 

      Nwawe, Richard; Grasso, Marzio; CHEN, Yong Kang; Klusak, Jan; Rosiello, Vincenzo; Counsell, Nathan; Herfatmanesh, Mohammad Reza; Partou, Helen; Menon, Catherine; Barker, Trevor; Veneziano, Vito; Kirner, Raimund; Tveretina, Olga; Verma, Alok; Lane, Peter; Lilley, Mariana; Canoville, Paul; Robinson, Matthew; Crook, Brian; Hall, Samantha; Kaye, Richard; Johnston, Ian; McCluskey, Daniel; Tracey, Mark; Munro, Ian; Wang, Yuan; Suckow, Bjorn; Klaholz, Ingo; Drix, Damien; Hafner, Verena Vanessa; Schmuker, Michael; Sinha, Ankur; Metzner, Christoph; Davey, Neil; Adams, Roderick; Steuber, Volker; Miko, Rebecca; Toffe, Gilles; Ren, Guogang; Montalvão, Diogo; Ismail, Sikiru O.; Newman, James; Dhakal, Hom; Sunmola, Funlade; Panday, Deepak; Helian, Na; Amafabia, Daerefa-a; David-West, Opukuro; Haritos, George; Schirmer, Pascal; Mporas, Iosif; Skaltsas, Grigorios; Siadati, Rana; Wernick, Paul; Sutton, Samuel; Lekkala, Himayasri Rao; Sayers, Paul; Khan, Imran; Cañamero, Lola; Hassan, Eheda; Denai, Mouloud; Pissanidis, Georgios; Goncharenko, Julia; Schilstra, Maria; Beka, Nathan; te Boekhorst, Rene; Bonivart, Agnes; Nehaniv, Chrystopher; Kadir, Shabnam; Bhavsar, Ronakben; Sun, Yi; Mayor, David; Steffert, Tony; CHEN, Yong Kang; Chrysanthou, Andreas; Johnston, Ian; Kirner, Raimund; Kourtessis, Pandelis; McCluskey, Daniel; Polani, Daniel; Steuber, Volker; Sun, Yichuang (University of Hertfordshire, 2019-09-01)
      This book is the record of abstracts submitted and accepted for presentation at the Inaugural Engineering and Computer Science Research Conference held 17th April 2019 at the University of Hertfordshire, Hatfield, UK. This ...

    • Profile Based Student Authentication in Online Examination 

      Ullah, Abrar; Xiao, Hannan; Lilley, Mariana (Institute of Electrical and Electronics Engineers (IEEE), 2012-06)
      Online examination is an increasingly important component of online courses, and student authentication is widely seen as one of the major concerns for online examinations. In the online examination scenario, face-to-face ...