| 1. |
- Abd-Alrahman, Ahmed Mustafa, et al.
(author)
-
Modelling Health Information during Catastrophic Events - A Disaster Management System for Sudan
- 2017
-
In: IST-Africa 2017. - : International Information Management Corporation Limited. - 9781905824571 ; , s. 1-9
-
Conference paper (peer-reviewed)abstract
- There is an increasing trend of disastrous events during past decade with significant damage in terms of lives, infrastructure, economics and environment. Disastrous events are affecting communities worldwide and, apart for the actual and personal suffering involved, can fundamentally disrupt societal functions for many years. This is particularly the case in already vulnerable regions, which often require external assistance of various kinds. In order to reduce catastrophic effects of disasters, disaster mitigation measures and crisis reduction must be systematically planned and managed. This includes correct damage assessment, fast, efficient and prepared responses, adequate resource allocation and organisation of the relief processes. Obviously, the conditions and abilities to implement such measures are very different in various locations, where regions have particularly severe conditions. In this paper, we discuss crisis management in Sudan and highlight the need for national and regional disaster management processes and activities as well as general framework for the design of an efficient disaster management program in Sudan.
|
|
| 2. |
|
|
| 3. |
- Abdel-Fattah, Dina, et al.
(author)
-
Application of a structured decision-making process in cryospheric hazard planning : Case study of Bering Glacier surges on local state planning in Alaska
- 2024
-
In: Journal of Multi-Criteria Decision Analysis. - 1057-9214 .- 1099-1360. ; 31:1-2
-
Journal article (peer-reviewed)abstract
- Surging glaciers are glaciers that experience rapidly accelerated glacier flow over a comparatively short period of time. Though relatively rare worldwide, Alaska is home to the largest number of surge-type glaciers globally. However, their impact on the broader socioecological system in the state is both poorly understood and under-researched, which poses a challenge in developing appropriate sustainability decisions in Alaska. We investigated how the surge patterns of the Bering Glacier in Alaska have potentially devastating effects on the local ecological biodiversity of its watershed via a structured decision-making analysis of the different possible consequences. Specifically, this analysis was conducted to explore the various outcomes of a Bering Glacier surge particularly if humans have an increased presence near the glacier due to the area potentially becoming a state park. This work explored the benefits of applying a risk and decision analytical framework in a cryosphere context, to better understand the socioeconomic impact of glacier surges. This is a novel approach in which a decision analysis tool was used to better understand an environmental sustainability challenge, offering an innovative method to support the achievement of the United Nations Sustainability Development Goals in Alaska. We therefore emphasise the need for integrated biophysical and socioeconomic analyses when it comes to understanding glacier hazards. Our research highlights the importance of understanding and researching biophysical changes as well as using a structured decision-making process for complicated hazard planning scenarios, exemplified via glaciated regions in Alaska, in order to create adaptation strategies that are sustainable and encompass the range of possible outcomes.
|
|
| 4. |
- Amon, B., et al.
(author)
-
From first-order logic to automated word generation for Lyee
- 2003
-
In: Knowledge-Based Systems. - : Elsevier BV. - 0950-7051 .- 1872-7409. ; 16:07-8, s. 413-429
-
Journal article (peer-reviewed)abstract
- A conceptual schema can be viewed as a language to describe the phenomena in a system to be modelled, i.e. a set of derivation rules and integrity constraints as well as a set of event-rules describing the behaviour of an object system. In this paper, we investigate the relationship between the Lyee software requirements concepts with various constructs in conceptual modelling. Within our work we choose the Unified Modelling Language (UML) as a modelling notation for explaining conceptual models. The result obtained models a fully expressive set of UML and First Order Logic constructs mapped into Lyee concepts.
|
|
| 5. |
|
|
| 6. |
- Araújo, Marco, 1982-, et al.
(author)
-
A Multi-Criteria Approach to Decision Making in Broadband Technology Selection
- 2022
-
In: Group Decision and Negotiation. - : Springer Science and Business Media LLC. - 0926-2644 .- 1572-9907. ; 31:2, s. 387-418
-
Journal article (peer-reviewed)abstract
- A new European Union regulatory framework for the telecom sector has been under a process of transposition to national laws by its member states that should have been completed by the end of 2020, notwithstanding some delays. A core purpose of the regulatory framework is to guarantee that most citizens will have access to very fast Internet connections, capable of 100 Mbps download link speed, regardless of where they live. According to this new framework, in areas where the market does not deliver, governments are to launch public tenders for the deployment, maintenance, and operations of network infrastructure as well as services, and public funds should be used to support the deployment of these broadband networks in less densely populated areas. Needless to say, public tenders of this nature are subject to different criteria when it comes to candidate evaluation. In this paper, we present a decision model for the selection of operators to deploy and maintain broadband networks in scarcely populated areas, taking into consideration infrastructure costs, the technical quality offered by the solutions, and the credibility of the candidates. We suggest an integrated multi-stakeholder multi-criteria approach and demonstrate how it can be used in this complex area and find that in the example provided, taking a relevant set of criteria into the analysis, optical fibre networks hold much higher chances to be used in these public tenders compared to networks based on the broadly favoured 5G technology.
|
|
| 7. |
- Araújo, Marco, et al.
(author)
-
A real options approach to decision making in broadband technology selection
- 2019
-
In: International Journal of Multicriteria Decision Making. - 2040-106X .- 2040-1078. ; 8:2, s. 184-210
-
Journal article (peer-reviewed)abstract
- The European Union has recently launched an ambitious plan to mitigate drastically, by 2025, the number of households lacking access to a 100 Mbps broadband connection through the subsidisation of the deployment of network infrastructure in rural areas. Decision makers such as governments and regulatory authorities therefore have to choose, among a pool of alternatives, a technology capable of delivering the required throughput on a large scale, based on a trade-off between the infrastructure costs and the subscribers’ perceived utility for each alternative. Such a trade-off is not simple, since there is no straightforward manner to rank the subscribers’ perceived utility against the network infrastructure cost. In this article, we propose a methodology based on real options, which outputs the value of each technology using multi-attribute value theory as an input, alongside the project’s risk and its costs.
|
|
| 8. |
- Araújo, Marco, et al.
(author)
-
A Utility Based Price Model for High Capacity Rural Networks in the European Union
- 2018
-
In: 2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC). - : IEEE. - 9781538660102 - 9781538660096 ; , s. 253-258
-
Conference paper (peer-reviewed)abstract
- The European Union has been battling against the digital divide for several decades now when trying to mitigate the risk of social exclusion arising from the lack of broadband access, preventing citizens from full social and economic participation in the society. This has been done in the past by ensuring that a minimum set of services would be available to all end-users at an affordable price. However, various aspects of the rapid advances in technology, market developments and changes in user demand as well as the evolution of the telecommunications infrastructure (5G, IoT, Cloud, gigabit access, etc) increase the risk that citizens of rural areas are facing a severe risk of digital exclusion. To avoid this risk, the concept of subsidised rural networks was created by the European Commission. The idea as such is laudable, but the price tag remains unknown, which severely violates its implementability. In this article, based on the actual cost in a subsidised, but competitive, environment, we suggest a novel approach to realistically determine fair end-user's prices.
|
|
| 9. |
- Araújo, Marco, 1982-
(author)
-
Infrastructure deployment in unprofitable areas : A techno-economic model for multiple criteria decision analysis under the European Union telecommunications regulatory framework
- 2020
-
Doctoral thesis (other academic/artistic)abstract
- In the European Union significant asymmetries prevail among member states in the most diverse areas. The telecom sector is no exception to this, with some members being much more advanced than others. Within the member states asymmetries also occur. And if we extrapolate this to a broader audience, for example the OECD, the European Union has been far away from some other members in what concerns asymmetries within own countries, with Japan and South Korea being the most evident. In 2016 the European Commission proposed a new regulatory framework for the telecom sector which was adopted in late 2018 by the European Parliament and must be transposed to national laws by member-states by late 2020. As we move towards the digital revolution, the so-called industry 4.0, the new EU regulatory framework has the aim of removing most of these asymmetries, by guaranteeing that most citizens will have access to a very fast Internet connection regardless of where they live. This regulatory framework provides some guidance and goals and funding objectives, but for operators and governments this is just not sufficient per se. Against this background, the overall research issue of this thesis is a methodological approach to how to determine the best access technology from a multi-criteria and multi-stakeholder perspective. In particular, to provide coverage in a certain region who lacks service a priori (therefore unprofitable by nature), problematics to be addressed include: i) what are exactly the new regulatory framework guidelines; ii) which strategic operational model to use; iii) what is the most appropriate technology to achieve these objectives; iv) how to handle the pricing incognita and all the financial component; v) how risky it is to make these objectives a reality.
|
|
| 10. |
- Araújo, Marco, et al.
(author)
-
Risk assessment in 5G infrastructure deployment : an aid tool for estimating spectrum auction prices
- 2019
-
In: 2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW). - : IEEE. - 9781728109237 - 9781728109220
-
Conference paper (peer-reviewed)abstract
- Risks are significant when implementing large-scale projects such as 5G. The higher the overall risk of the 5G project, the lower the operators’ willingness to invest in millimetre wave spectrum and vice-versa; i.e. the price of the spectrum should be negatively correlated with the overall project risk. In this paper, we propose an array-based method for estimating financial risks when introducing 5G and its correspondence with spectrum prices. The method is based on Monte Carlo simulations, for deriving an appropriate maximum value for the operator’ willingness to pay for a 5G license.
|
|
