116 research outputs found
A model driven approach to web-based traffic simulation.
As the world population increases the number of vehicles in the traffic increases as well, and so the traffic becomes more complex. Problems in the urban traffic such as traffic congestion, car accidents, parking difficulties, etc. have a large impact on people's lives as well as the environment. Therefore, researchers, policy makers, decision takers and planners use expert tools to find the best solutions for traffic and transportation problems.
Traffic modeling and simulation has been used for analyzing, designing, planning and managing urban traffic for many years. Various techniques have been proposed and many tools have been developed by researchers to assist the modeling and simulation activities in the traffic domain for more than half a century. However, improving the existing methods and developing new tools for traffic simulation are gaining importance due to the emerging technologies. Web-based modeling and simulation has been popular in the last decade, and has a great promise in terms of collaborative and distributed simulations. Model driven approaches are employed in the simulation field for a long time and have provided rapid development solutions. In this paper, a model driven Web-based traffic simulation framework is proposed and a prototype implementation is presented
Transforming Diagrams' Semantics to Text for Visually Impaired
Using models and diagrams is a very useful and effective tool
for representing information and systems in a graphical form to communicate and understand them better. On the other hand, graphical representations bring extra cognitive load and the process for understanding
the diagrams is long and tedious in most cases for the visually impaired.
To solve this problem, semantics of the diagrams should be converted
to a different format that is both human and machine readable as well
as communicable for the visually impaired. Most existing diagramming
tools are not easily usable for the visually impaired as a tool for creating and using diagrams. In this paper, we propose an online system for
defining specific diagrams and converting their semantics to text which
can have a speech output for the visually impaired. We present analysis
and design of this online system as well as a proof of concept prototype
implementation. The prototype system provides create, save, load and
transform features and tested with participants to recreate the diagrams
using the automatically generated text output. Our case study showed
that the results are very promising and the proposed solution can provide
a way to correctly and accurately represent the information in diagrams
textually
Using Technology to Enhance Assessment and Feedback: A Framework for Evaluating Tools and Applications
Although assessment and feedback are very important aspects of
teaching and learning it has been regularly reported that there are
issues with their practice. While research has shown ways to
enhance assessment and feedback, and best practices have been
established, various challenges, such as limitations on time and
resources, make implementing such improvements difficult.
Consequently, this paper considers the use of technology for
supporting teaching, assessment and feedback to improve working
practices and the student experience in a time and resource
efficient manner. Using a feature analysis evaluation technique,
this paper proposes a comparison framework for reviewing
technological tools/applications that can be used to assist
teaching, assessment and feedback. By providing solid rationale,
this framework has the potential to enhance decision making
when choosing suitable technological solutions to improve
teaching and assessment, and to enhance the learning experience
Model Continuity in Discrete Event Simulation: A Framework for Model-Driven Development of Simulation Models.
Most of the well known modeling and simulation methodologies state the importance of conceptual modeling in simulation studies and they suggest the use of conceptual models during the simulation model development process. However, only a limited number of methodologies refers to howto move from a conceptual model to an executable simulation model. Besides, existing modeling and simulation methodologies do not typically provide a formal method for model transformations between the models in different stages of the development process. Hence, in the current M&S practice, model continuity is usually not fulfilled. In this article, a model driven development framework for modeling and simulation is in order to bridge the gap between different stages of a simulation study and to obtain model continuity. The applicability of the framework is illustrated with a prototype modeling environment and a case study in the discrete event simulation domain
Monitoring and Controlling Phone Usage to Raise Awareness and Combat Digital Addiction.
One of the defining factors in human progress is
the fact how humans have adopted technology into their
everyday lives. One of these technologies that has seen a
tremendous increase in usage is the mobile phone. The potential
overuse of a smartphone device is very easily done, with many
possible bad psychological side effects. Digital addiction is a
form of addiction that has become more prevalent with people
due to the ever-growing technological advances that our devices
have achieved. This work focuses on what could be done to assist
people via a software application who either have the addiction
or help prevent people from becoming addicted. This paper
presents design and implementation of a mobile application to
monitor and control the phone usage so that it can help combat
digital addiction. The prototype implementation lets user see
how much time they use on their phone as well as set some
preferences. The study has been evaluated by user testing and
having user feedback
Problem-Oriented Conceptual Model and Ontology for Enterprise e-Recruitment
Internet-led labour market has become so competitive forcing many organisations from different sectors to embrace e-recruitment. However, realising the value of the e-recruitment from a Requirements Engineering (RE) analysis perspective is challenging. The research is motivated by the results of a failed e-recruitment project as a case study by focusing on the difficulty of scoping and representing recruitment problem knowledge to systematically inform the RE process towards an e-recruitment solution specification. In this paper, a Problem-Oriented Conceptual Model (POCM) supported by an Ontology for Recruitment Problem Definition (Onto-RPD) for contextualisation of the enterprise e-recruitment problem space is presented. Inspired by Soft Systems Methodology (SSM), the POCM and Onto-RPD are produced based on the detailed analysis of three case studies: (1) Secureland Army Enlistment, (2) British Army Regular Enlistment, and (3) UK Undergraduate Universities and Colleges Admissions Service (UCAS). The POCM and the ontology are demonstrated and evaluated by a focus group against a set of criteria. The evaluation showed a valuable contribution of the POCM in representing and understanding the recruitment problem and its complexity
A Conceptual Framework for Cloud-based Collaborative Online Course Provision
A cloud-based collaborative environment for online course provision between universities can facilitate a cost-effective, efficient and enriched education enabling good student experience. However, there are a number of challenges and issues that should be taken into consideration prior to adopting the collaborative environment. They relate to management and administration, cost, collaborative Virtual Learning Environment, ownership, development of courses and teaching resources, as well as culture. To address these challenges a conceptual framework is proposed for this environment which highlights key issues and associated relationships between them. The framework contains five main elements, including Quality, Legal, Security, Operation and Education. The framework illustrates the relationship between the elements. A prototype is also discussed which was designed to test part of the framework
TranspLanMeta: A metamodel for TranspLan modeling language
Transparency and transparent decision making are essential requirements in information systems. To this end,
a modeling language called TranspLan has been proposed. TranspLan is a domain-specific modeling language which is designed for the purpose of analysing and modeling transparency requirements in information
systems. This paper presents a metamodel for transparency requirements modeling. We are introducing a
model-driven approach to TranspLan language specifications to facilitate the use of the language more efficiently in real life cases. Metamodeling is an effective method for formally defining domain specific languages
and moving from specifications to computer-aided modeling. In this paper, we propose a metamodel for TranspLan modeling language which is called as TranspLanMeta. The metamodeling process helps us to transfer
TranspLan language specifications into a machine-readable format. The metamodel has been developed with
GME (Generic Modelling Environment), which is a configurable toolkit for creating domain-specific modeling
and program synthesis environments. By developing TranspLanMeta with GME, an automatically-generated
modeling tool for TranspLan language is provided as well. In this way, an effective approach for accelerating
software development is followed and the auto-generated modeling editor is used to define various models.
This work provides a formal and practical solution for transparency modeling and a well-defined basis for
using transparency requirements models in the further steps of the business process
Towards a Systematic Literature Review of Non-Functional Requirement Prioritization Approaches
The success of any software system depends on implementation of functional
requirements followed by non-functional ones. There are various studies about
prioritizing functional requirements and improving the prioritization techniques, but
the work related to non-functional requirements prioritization is limited and there are
no guidelines about which technique to be executed under particular circumstances.
This paper does an empirical systematic review of the literature to identify and
critically review the disseminated work based on empirical studies of software
industries or presenting the non-functional requirement (NFR) prioritization
approaches. The literature review yielded various insights; prominent amongst them
includes, ad-hoc manner of NFR prioritization, neglection of NFRs, and the need for
validation of existing NFR prioritization approaches on live data set with large
number of NFRs which are always changing
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