A Survey of Green Networking Research

Reduction of unnecessary energy consumption is becoming a major concern in wired networking, because of the potential economical benefits and of its expected environmental impact. These issues, usually referred to as "green networking", relate to embedding energy-awareness in the design, in the devices and in the protocols of networks. In this work, we first formulate a more precise definition of the "green" attribute. We furthermore identify a few paradigms that are the key enablers of energy-aware networking research. We then overview the current state of the art and provide a taxonomy of the relevant work, with a special focus on wired networking. At a high level, we identify four branches of green networking research that stem from different observations on the root causes of energy waste, namely (i) Adaptive Link Rate, (ii) Interface proxying, (iii) Energy-aware infrastructures and (iv) Energy-aware applications. In this work, we do not only explore specific proposals pertaining to each of the above branches, but also offer a perspective for research.Comment: Index Terms: Green Networking; Wired Networks; Adaptive Link Rate; Interface Proxying; Energy-aware Infrastructures; Energy-aware Applications. 18 pages, 6 figures, 2 table

Architecture of an end-to-end energy consumption model for a cloud data center

Estimates show that a significant proportion of future ICT related energy consumption will be from Cloud Computing. Based on detail analysis and survey of energy consumption and optimization trends in cloud computing, this research presents a comprehensive end-to-end energy consumption model of a cloud facility extending from the end-user equipment to the data center facility. The model is subdivided into three planes and four associated layers and depicts the cross-plane and cross-layer relationships between the components in terms of energy consumption and potential optimization areas and provides a reference framework for planning power optimization strategies at a cloud facility

The Evolution of National Spatial Data Infrastructure in Pakistan - Implementation Challenges and the Way Forward

Geospatial data are produced by several organizations located at various places, and that is clearly a distributed environment. Many technical and institutional issues need to be resolved to share data in such an environment and to eventually enable regional development. For this matter, many countries implement Spatial Data Infrastructures (SDIs) for the last 40 years. Since 2010, also Pakistan is striving to implement an SDI at the national level (NSDI). However, so far, the promised benefits have not yet been achieved. This study explores the evolution of the NSDI in Pakistan from 2010 till 2020 to reveal what kind of challenges the country is facing. Given the importance of stakeholders' support for the implementation of SDIs, we conducted a stakeholder analysis and a dedicated survey. We adopted the power-interest grid method to classify stakeholders' interests based on their authority to influence the NSDI development. Among other, the results show that stakeholders’ low participation due to insufficient technological, financial, and human resources impedes NSDI implementation efforts in the country

Proposal of an Academic Spatial Data Infrastructure for the Federal University of Viçosa

Universities use and produce significant amounts of cartographic data. Besides the administrative sector, which is responsible for the management of the territory, several research, education and extension projects also involve large volumes of maps and other types of spatial information. However, much of the data produced in higher education institutions is lost in laboratories or in the possession of researchers - making it impossible to reuse this information and doubling expenses in the reproduction of such data. An Academic Spatial Data Infrastructure (SDI) would enable the availability and standardization of spatial data produced in higher education institutions. Understanding this potentiality, the article at hand describes the development of an Academic SDI for the Federal University of Viçosa (SDI-UFV). In order to identify all the elements to be provided by the SDI-UFV, we began with the conceptual modeling of existing data and user needs. For the implementation of this SDI, we had to establish partnerships with the administrative bodies of the university. This helped us to define an institutional structure that ensures the management, maintenance and continuity of the SDI within the university. We proposed the appointment of a permanent commission and a resolution model. Regarding the technological components, we decided to use Free and Open Source Software (FOSS). We used the PostGIS database management system, the i3Geo software for the publication of spatial data, the edpMGBs editor for creating metadata, and the GeoNetwork software for managing the metadata catalog. The standards adopted were those approved by the Brazilian National Spatial Data Infrastructure (INDE), which follow the standards of the Open Geospatial Consortium (OGC)

Status of National Open Spatial Data Infrastructures: a Comparison Across Continents

The increasing need for geospatial information demands for well-organised management among all levels of society. A Spatial Data Infrastructure (SDI) is a multidisciplinary and dynamic instrument that facilitates access and sharing of geospatial information. The current trend towards open data initiatives is influencing the development of these infrastructures. In order to examine this effect, this article addresses the following question: what is the current state of SDI openness of four best practice open data countries Canada, The Netherlands, Australia and Brazil, and how do they compare? The question is answered through a qualitative literature study and the application of a newly developed Open SDI Assessment Framework to the countries. The Netherlands and Canada show a high performance on all assessment dimensions; data discovery, data access and data properties. Australia and Brazil show a poor open SDI performance, as they could not meet the requirements set for the assessed datasets. General conclusions of the assessment are that data is currently fragmented and scattered among the web in all four countries, which strongly negatively influences the user experience. It is crucial that a strict legal framework is embedded in a country, which ensures that current SDI objectives and propositions regarding an user-centred approach and open data availability are achieved

Competence management within organisations as an approach to enhancing GIS maturity

The national spatial data infrastructure (NSDI) and GIS maturity of user organisations are mutually dependent. Only when the GIS maturity of user organisations is at a high level can they direct their needs to the development of an NSDI and the benefits of the NSDI come true to their full extent. To raise their GIS maturity to a level where user organisations can both utilise spatial data comprehensively in their businesses and contribute to the development of the NSDI, we propose a GIS maturity enhancement model in which competence management is the fundamental theme. The model suggests the means to improve the GIS maturity of an organisation. The model was motivated by user interviews in Finland, where the technical standard of GIS is not a hindrance to further development, but better exploitation of human competence seems to be the way forward

The Rwanda Metadata Portal: A Web Catalogue Service

The creation of a National Spatial Data Infrastructure (NSDI) is of growing interest in Rwanda. The importance of NSDI in facilitating access to and use of geospatial data to support decision-making is recognised. Numerous government ministries and institutions in Rwanda produce geospatial datasets of different themes. It is challenging to know what datasets exist and how to access them. Since geospatial data is costly to produce, it is expedient to reuse data in different applications. Realizing that geospatial metadata are needed to properly manage and maximize data use, a metadata portal was developed. The aim is to ease the discovery of existing geospatial datasets on Rwanda. This paper describes the procedure utilised in compiling and creating metadata, presents an overview of the portal and discusses challenges faced in its development. The information will be particularly useful for those wanting to establish or already working on metadata in similar less economically developed context as ours