44,307 research outputs found
Transparent and scalable client-side server selection using netlets
Replication of web content in the Internet has been found to improve service response time, performance and reliability offered by web services. When working with such distributed server systems, the location of servers with respect to client nodes is found to affect service response time perceived by clients in addition to server load conditions. This is due to the characteristics of the network path segments through which client requests get routed. Hence, a number of researchers have advocated making server selection decisions at the client-side of the network. In this paper, we present a transparent approach for client-side server selection in the Internet using Netlet services. Netlets are autonomous, nomadic mobile software components which persist and roam in the network independently, providing predefined network services. In this application, Netlet based services embedded with intelligence to support server selection are deployed by servers close to potential client communities to setup dynamic service decision points within the network. An anycast address is used to identify available distributed decision points in the network. Each service decision point transparently directs client requests to the best performing server based on its in-built intelligence supported by real-time measurements from probes sent by the Netlet to each server. It is shown that the resulting system provides a client-side server selection solution which is server-customisable, scalable and fault transparent
The Glacier Complexes of the Mountain Massifs of the North-West of Inner Asia and their Dynamics
The subject of this paper is
the glaciation of the mountain massifs
Mongun-Taiga, Tavan-Boghd-Ola, Turgeni-
Nuru, and Harhira-Nuru. The glaciation is
represented mostly by small forms that
sometimes form a single complex of domeshaped
peaks. According to the authors,
the modern glaciated area of the mountain
massifs is 21.2 km2 (Tavan-Boghd-Ola),
20.3 km2 (Mongun-Taiga), 42 km2 (Turgeni-
Nuru), and 33.1 km2 (Harhira-Nuru).
The area of the glaciers has been shrinking
since the mid 1960âs. In 1995â2008, the rate
of reduction of the glaciersâ area has grown
considerably: valley glaciers were rapidly
degrading and splitting; accumulation
of morainic material in the lower parts
of the glaciers accelerated. Small glaciers
transformed into snowfields and rock
glaciers. There has been also a degradation
of the highest parts of the glaciers and the
collapse of the glacial complexes with a
single zone of accumulation into isolated
from each other glaciers. Reduced snow
cover area has led to a rise in the firn
line and the disintegration of a common
accumulation area of the glacial complex.
In the of the Mongun-Taiga massif, in 1995â
2008, the firn line rose by 200â300 m. The
reduction of the glaciers significantly lagged
behind the change in the position of the
accumulation area boundary. In the past two
years, there has been a significant recovery
of the glaciers that could eventually lead to
their slower degradation or stabilization of
the glaciers in the study area
Using Technology Enabled Qualitative Research to Develop Products for the Social Good, An Overview
This paper discusses the potential benefits of the convergence of three recent trends for the design of socially beneficial products and services: the increasing application of qualitative research techniques in a wide range of disciplines, the rapid mainstreaming of social media and mobile technologies, and the emergence of software as a service. Presented is a scenario facilitating the complex data collection, analysis, storage, and reporting required for the qualitative research recommended for the task of designing relevant solutions to address needs of the underserved. A pilot study is used as a basis for describing the infrastructure and services required to realize this scenario. Implications for innovation of enhanced forms of qualitative research are presented
Multinet : enabler for next generation enterprise wireless services
Wireless communications are currently experiencing a fast migration toward the beyond third-generation (B3G)/fourth generation (4G) era. This represents a generational change in wireless systems: new capabilities related to mobility and new services support is required and new concepts as individual-centric, user-centric or ambient-aware communications are included. One of the main restrictions associated to wireless technology is mobility management, this feature was not considered in the design phase; for this reason, a complete solution is not already found, although different solutions are proposed and are being proposed. In MULTINET project, features as mobility and multihoming are applied to wireless network to provide the necessary network and application functionality enhancements for seamless data communication mobility considering end-user scenario and preferences. The aim of this paper is to show the benefits of these functionalities from the Service Providers and final User point of view
Modernizing National Numbering Plan on NGN Platform - Hungarian Case Study
The intensive technological development of the last years brought the overall acceptance of an IP based network and services vision based on the NGN. The realization of the NGN vision, the decision on the migration to NGN sets regulatory tasks, especially in the area of numbering and addressing. The utilization of the opportunities provided by the NGN platform requires the use of IP addresses and names in the core network, the role of the E.164 numbers is taken over by IP addresses. However in case of voice services the identification of end-user access points will remain by the use of E.164 numbers. Migration to NGN doesn't require directly the change of the subscribers' phone number; however the NGN enables among others the implementation of national number portability for fixed telephone service. The opportunities can be realized by using uniform domestic number length and dialling method, practically closed numbering. The introduction of a 9-digit uniform, closed domestic numbering provides a consistent solution for the deficiencies of the present Hungarian numbering plan, too. Recently it can be reached in single step so that the present 9-digit domestic numbers and the short codes remain unchanged, the 8-digit domestic numbers are completed to 9-digit by the insertion of an appropriate digit, as well as the present and new numbering schemes can be in operation simultaneously. --
Integrating Mobile Web 2.0 within tertiary education
Based on three years of innovative pedagogical development and guided by a participatory action research
methodology, this paper outlines an approach to integrating mobile web 2.0 within a tertiary education
course, based on a social constructivist pedagogy. The goal is to facilitate a student-centred, collaborative,
flexible, context-bridging learning environment that empowers students as content producers and learning
context generators, guided by lecturers who effectively model the use of the technology. We illustrate how
the introduction of mobile web 2.0 has disrupted the underlying pedagogy of the course from a traditional
Attelier model (face-to-face apprenticeship model), and has been successfully transformed into a context
independent social constructivist model. Two mobile web 2.0 learning scenarios are outlined, including; a
sustainable house design project (involving the collaboration of four departments in three faculties and three
diverse groups of students), and the implementation of a weekly ânomadic studio session'. Students and
lecturers use the latest generation of smartphones to collaborate, communicate, capture and share critical and
reflective learning events. Students and lecturers use mobile friendly web 2.0 tools to create this
environment, including: blogs, social networks, location aware (geotagged) image and video sharing, instant
messaging, microblogging etc⊠Feedback from students and lecturers has been extremely positive
Disability, citizenship and uncivilized society: the smooth and nomadic qualities of self-advocacy
People with the label of "intellectual disabilities"1 are often objectified and devalued by master narratives of deviance, tragedy and lack. In this paper, we draw on poststructuralist and feminist resources (e.g. Deleuze & Guattari 1987 and Braidotti 1994, 2002, 2006a) to argue that a disabling society is uncivilized in ways that block the becomings of citizenship. We draw upon our work with self-advocacy groups in England and Belgium where self-advocates open up different life worlds. We shed light on their politics of resistance and resilience, and map how they, as politicized citizen subjects, move in a web of oppressive disability discourses. However, we suggest, as nomads, they set foot on the landmarks of their lives in a never-ending search for smooth spaces in which something different might happen
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