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1 – 10 of 142
Article
Publication date: 2 February 2010

M.R. Martínez‐Torres, S.L. Toral, F. Barrero and F. Cortés

The Internet has evolved, prompted in part by new Web 2.0 technologies, to become a more widespread platform for interaction, communication, and activism. Virtual…

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Abstract

Purpose

The Internet has evolved, prompted in part by new Web 2.0 technologies, to become a more widespread platform for interaction, communication, and activism. Virtual communities, or groups of people informally bound together by shared expertise, synthesise this Internet evolution and the Web 2.0 technology. Users increasingly want to engage online with one another and with organisations of all kinds. These novel Internet‐based technologies dominate the new business models of the digital economy giving companies radical new ways to harvest the talents of innovators working outside corporate boundaries. One of the most illustrative examples of this new trend is the Open Source Software (OSS) projects development. This paper aims to analyse the structure and topology of the virtual community supporting one of the most successfully OSS projects, Linux. The objective is to provide conclusions for being successful in the development of future virtual communities. As companies learn to manage these virtual communities, they will develop smarter and faster ways to create value through them.

Design/methodology/approach

The interactions of the virtual community members of an ARM‐embedded Linux project website is analysed through social network analysis techniques. The participants' activity is studied and some conclusions about the participation features are obtained using the Gini coefficient. In particular, a participation inequality behaviour or a concentration on a small number of developers is clearly observed.

Findings

The paper deals with the guidelines that virtual communities should follow to be successful. Results about the structure of a successful virtual community and its time evolution are provided to determine the mentioned guidelines.

Research limitations/implications

The research is limited to a particular virtual community engaged with the development of the ARM‐embedded Linux OSS. Other successful virtual communities can be analysed, and the conclusions could be compared. Anyway, the proposed analysis methodology can be extended to other virtual communities.

Originality/value

The paper fulfils the development and features of Internet virtual communities to be successful. Results have important implications over the development of new software business models based on virtual communities and open source software. Contributions about the best organisation of virtual communities leading to a successful development of the underlying project are presented.

Details

Internet Research, vol. 20 no. 1
Type: Research Article
ISSN: 1066-2243

Keywords

Article
Publication date: 1 February 2008

F. Barrero, S. Toral and S. Gallardo

The purpose of this paper is to present a remote lab and a web‐based teaching environment which provides access for remote control of Digital Signal Processors (DSP…

1011

Abstract

Purpose

The purpose of this paper is to present a remote lab and a web‐based teaching environment which provides access for remote control of Digital Signal Processors (DSP device) and real instrumentation. The framework, named eDSPLab, has been designed using LabVIEW for debugging and testing Digital Signal Processing (DSP) experiments in a real lab without physical and temporal restrictions, and it has been integrated as a service in a modern e‐learning application domain and a Learning Management System (LMS) to reinforce its utility.

Design/methodology/approach

A literature review is presented to provide background to the progressive role that DSP and DSP devices play in Information and Communications Technology (ICT)‐demanded job profiles, and the role that a computer‐mediated environment plays in modern teaching methodologies. The web service access control architecture is defined.

Findings

The paper provides new insights into the use of the Internet for laboratory teaching.

Research limitations/implications

This research was limited to one particular remote lab. Results could be extended if students' perceptions and their acceptance of the new e‐learning technology are examined using an information system theory, such as the Technology Acceptance Model (TAM).

Originality/value

This paper fulfils a need for adapting the teaching methodology applied in an undergraduate Advanced Microprocessor course of the Telecommunication Engineering degree at the University of Seville, Spain, allowing the development of laboratory experiments anywhere and anytime, avoiding one of the problems in lab training: the low number of laboratory working places in relation to the high number of enrolled students. The system developed has been successfully used during the last academic years in a course involving more than 200 students.

Details

Internet Research, vol. 18 no. 1
Type: Research Article
ISSN: 1066-2243

Keywords

Book part
Publication date: 24 November 2021

James E. Austin, Gabriel Berger, Rosa Amelia González, Roberto Gutiérrez, Iván D. Lobo and Alfred Vernis

Purpose: Provide insights on how social entrepreneurship (SE) knowledge can be more effectively generated by universities through the entrepreneurial creation and…

Abstract

Purpose: Provide insights on how social entrepreneurship (SE) knowledge can be more effectively generated by universities through the entrepreneurial creation and effective management of a knowledge network centered on international collaborative research; illuminate how one such network has enabled Latin American researchers to advance the knowledge and practice frontiers in the hemisphere and globally. Methodology/Approach: Retrospective analysis of the two-decade evolution of the Social Enterprise Knowledge Network, a pioneering international research collaboration (IRC) of Ibero-American management schools. Findings: Documents factors and dynamics enabling the successful creation and operation of international knowledge networks. Analyzes the key mechanisms for capturing synergies in collaborative research. Identifies specific effectiveness determinants for successfully operating an international social enterprise knowledge generation network. Identifies multiple impacts of a knowledge generation network. Research Implications: Advances understanding of IRCs. Provides a model for assessing knowledge network multiple impacts. Identifies a series of future research opportunities and needs. Practical Implications: Provides operational guidance for researchers developing or operating collaborative international knowledge networks. Social Implications: Reveals the value of collaboration in international research and factors that contribute to effective collaboration. Originality/Value: Provides unique retrospective study of an IRC network operated by developing country schools of management. Expands the scope of recent comparative research on SE education to include a set of countries in Ibero-America. Documents an approach to assessing the impacts of a knowledge network. Identifies important areas for advancing future social enterprise research and teaching.

Article
Publication date: 6 April 2020

Sathishkumar Kaliyavarathan and Sivakumaran T.S.

The purpose of this paper is to study the development of novel multiphase induction motor (MPIM) with copper die cast rotor in the drive system of electric propulsion…

Abstract

Purpose

The purpose of this paper is to study the development of novel multiphase induction motor (MPIM) with copper die cast rotor in the drive system of electric propulsion vehicles (EPV). It is estimated that the manufacturers are concerned about high torque,Efficiency, motor life, energy conservation and high thermal tolerance. To ensure maximum torque and efficiency with multiphase winding and copper die cast technology to increasing high thermal tolerance, life, energy conversations. On other hand, it is very important of EPV application.

Design/methodology/approach

The focus of the investigation is threefold: the modified method carried out on MPIM both stator and rotor can overcome the current scenario problem facing by electric vehicles manufacture and developed perfect suitable electric motor for EPV applications. The design and simulation carried out finite element method (FEM) that was more accurate calculations. Finally developed prototype model of MPIM with copper die cast are discussed with conventional three phase Die casting Induction motor.

Findings

The paper confirmed the multiphase copper die-cast rotor induction motor (MDCrIM) is providing better performance than conventional motor. Proposed motor can bring additional advantage like heat tolerances, long life and energy conversations.

Originality/value

The experiments confirmed the MDCIM suitable for EPV Applications. The modified MDCIM of both stator and rotor are giving better result and good performance compared to conventional method.

Article
Publication date: 14 August 2009

Sergio L. Toral, M. Rocío Martínez‐Torres, Federico Barrero and Francisco Cortés

A large variety of online communities have emerged during the last years as a result of the challenges faced by both the business and scientific worlds. This trend has…

3181

Abstract

Purpose

A large variety of online communities have emerged during the last years as a result of the challenges faced by both the business and scientific worlds. This trend has also been promoted by the development of internet and new Web 2.0 technologies. In this context, this paper is focused on the determinants of success of online communities. But, as a difference from other studies, these determinants are analyzed from the social network analysis perspective. Several constructs related to the community organization as a social network are proposed and their interrelations are hypothesized in a general research framework. The obtained results test the proposed model providing the most relevant antecedents of the project success.

Design/methodology/approach

A case study based on Linux ports to non‐conventional processor and environments is used to test the proposed model. Structural equation modeling analysis is used to validate the structural proposed model.

Findings

The main antecedents of online communities' success, quantifying the strength of the relation through the standardized path coefficients.

Research limitations/implications

The research is limited to a particular set of online communities engaged with the development of the non‐conventional Linux ports. However, they constitute a representative set of communities in the field of the open source projects (OSS) development, which are typically developed using a community of support.

Originality/value

This paper fulfils the main antecedents causing the successful development of Internet virtual communities. Instead of using sources of data coming from users' surveys, this study employs community interactions as a source of data. Results have important implications over the development of online communities, like software business models based on virtual communities and open source software.

Details

Internet Research, vol. 19 no. 4
Type: Research Article
ISSN: 1066-2243

Keywords

Article
Publication date: 28 January 2011

M.R. Martínez‐Torres, Sergio L. Toral, Beatriz Palacios and Federico Barrero

Web sites are typically designed attending to a variety of criteria. However, web site structure determines browsing behavior and way‐finding results. The aim of this…

2469

Abstract

Purpose

Web sites are typically designed attending to a variety of criteria. However, web site structure determines browsing behavior and way‐finding results. The aim of this study is to identify the main profiles of web sites' organizational structure by modeling them as graphs and considering several social network analysis features.

Design/methodology/approach

A case study based on 80 institutional Spanish universities' web sites has been used for this purpose. For each root domain, two different networks have been considered: the first is the domain network, and the second is the page network. In both cases, several indicators related to social network analysis have been evaluated to characterize the web site structure. Factor analysis provides the statistical methodology to adequately extract the main web site profiles in terms of their internal structure.

Findings

This paper allows the categorization of web site design styles and provides general guidelines to assist designers to better identify areas for creating and improving institutional web sites. The findings of this study offer practical implications to web site designers for creating and maintaining an effective web presence, and for improving usability.

Research limitations/implications

The research is limited to 80 institutional Spanish universities' web sites. Other institutional university web sites from different countries can be analyzed, and the conclusions could be compared or enlarged.

Originality/value

This paper highlights the importance of the internal web sites structure, and their implications on usability and way‐finding results. As a difference to previous research, the paper is focused on the comparison of internal structure of institutional web sites, rather than analyzing the web as a whole or the interrelations among web sites.

Details

Internet Research, vol. 21 no. 2
Type: Research Article
ISSN: 1066-2243

Keywords

Article
Publication date: 6 April 2010

Federico Barrero, Sergio Toral, Manuel Vargas, Francisco Cortés and Jose Manuel Milla

Intelligent transportation systems (ITS) are defined as new infrastructures that combine people, roads and vehicles over the basis of modern embedded systems with enhanced…

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Abstract

Purpose

Intelligent transportation systems (ITS) are defined as new infrastructures that combine people, roads and vehicles over the basis of modern embedded systems with enhanced digital connectivity. ITS is fast becoming a reality, favored in their development by the use of the internet. The purpose of this paper is to analyze the feasibility of road‐traffic management systems, using the internet as the communication link.

Design/methodology/approach

A literature review is presented to give a background in the progressive role that ITS and road safety and control applications play in society. The combination of internet and the ITS architecture is covered, and an electronic prototype providing web services for road‐traffic management is designed as an example. The scope of road traffic security research is extensive, and the use of artificial vision systems in road‐traffic analysis (technology which is on the basis of the developed prototype) is also discussed. The hardware and software characteristics of the prototype are defined.

Findings

The paper provides new insights into the use of the internet for road‐traffic management applications.

Research limitations/implications

The research is limited to one particular road‐traffic management system. Results could be extended if more real equipments were analyzed. Also, end‐users' perception and their acceptance of the new technology could be examined using an information system theory like the technology acceptance model.

Originality/value

The paper shows the utility of the internet in the development of novel ITS.

Details

Internet Research, vol. 20 no. 2
Type: Research Article
ISSN: 1066-2243

Keywords

Article
Publication date: 5 March 2018

Jinlin Gong, Frédéric Gillon and Nicolas Bracikowski

This paper aims to investigate three low-evaluation-budget optimization techniques: output space mapping (OSM), manifold mapping (MM) and Kriging-OSM. Kriging-OSM is an…

Abstract

Purpose

This paper aims to investigate three low-evaluation-budget optimization techniques: output space mapping (OSM), manifold mapping (MM) and Kriging-OSM. Kriging-OSM is an original approach having high-order mapping.

Design/methodology/approach

The electromagnetic device to be optimally sized is a five-phase linear induction motor, represented through two levels of modeling: coarse (Kriging model) and fine.The optimization comparison of the three techniques on the five-phase linear induction motor is discussed.

Findings

The optimization results show that the OSM takes more time and iteration to converge the optimal solution compared to MM and Kriging-OSM. This is mainly because of the poor quality of the initial Kriging model. In the case of a high-quality coarse model, the OSM technique would show its domination over the other two techniques. In the case of poor quality of coarse model, MM and Kriging-OSM techniques are more efficient to converge to the accurate optimum.

Originality/value

Kriging-OSM is an original approach having high-order mapping. An advantage of this new technique consists in its capability of providing a sufficiently accurate model for each objective and constraint function and makes the coarse model converge toward the fine model more effectively.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 2
Type: Research Article
ISSN: 0332-1649

Keywords

Open Access
Article
Publication date: 11 March 2020

Sara Torregrosa-Hetland

The purpose of this paper is to estimate tax evasion and its impact on progressivity, redistribution and the measurement of inequality, using microdata from the Spanish…

3206

Abstract

Purpose

The purpose of this paper is to estimate tax evasion and its impact on progressivity, redistribution and the measurement of inequality, using microdata from the Spanish income tax for 2001-2004.

Design/methodology/approach

The approach follows Feldman and Slemrod (2007) by exploiting the relation of charitable donations with the composition of income but introduces two methodological innovations, which could be useful for further studies: correction for sample selection with a Heckman two-step setting and the calculation of different evasion rates for top incomes with an interaction term.

Findings

Evasion in capital incomes was significant throughout these years. Financial incomes were reported at around 50-70 per cent of their real value, with the lowest estimates corresponding to the top decile. Revenues from fixed capital display similarly low compliance rates for the top 10 per cent. Tax evasion in self-employment incomes (direct assessment) is estimated at 20 per cent for 2001. Mostly because of a composition effect, this means that fraud was higher at the top of the income distribution, thus having a regressive impact. Inequality statistics and top income concentration estimates should, therefore, be revised upwards.

Originality/value

This is the first paper to estimate the distributive impacts of tax evasion in Spain, and one of very few internationally.

Details

Applied Economic Analysis, vol. 28 no. 83
Type: Research Article
ISSN: 2632-7627

Keywords

Article
Publication date: 14 August 2019

Marijn Janssen, Sunil Luthra, Sachin Mangla, Nripendra P. Rana and Yogesh K. Dwivedi

The wider use of Internet of Things (IoT) makes it possible to create smart cities. The purpose of this paper is to identify key IoT challenges and understand the…

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Abstract

Purpose

The wider use of Internet of Things (IoT) makes it possible to create smart cities. The purpose of this paper is to identify key IoT challenges and understand the relationship between these challenges to support the development of smart cities.

Design/methodology/approach

Challenges were identified using literature review, and prioritised and elaborated by experts. The contextual interactions between the identified challenges and their importance were determined using Interpretive Structural Modelling (ISM). To interrelate the identified challenges and promote IoT in the context of smart cities, the dynamics of interactions of these challenges were analysed using an integrated Matrice d’Impacts Croisés Multiplication Appliqués à un Classement (MICMAC)-ISM approach. MICMAC is a structured approach to categorise variables according to their driving power and dependence.

Findings

Security and privacy, business models, data quality, scalability, complexity and governance were found to have strong driving power and so are key challenges to be addressed in sustainable cities projects. The main driving challenges are complexity and lack of IoT governance. IoT adoption and implementation should therefore focus on breaking down complexity in manageable parts, supported by a governance structure.

Practical implications

This research can help smart city developers in addressing challenges in a phase-wise approach by first ensuring solid foundations and thereafter developing other aspects.

Originality/value

A contribution originates from the integrated MICMAC-ISM approach. ISM is a technique used to identify contextual relationships among definite elements, whereas MICMAC facilitates the classification of challenges based on their driving and dependence power. The other contribution originates from creating an overview of challenges and theorising the contextual relationships and dependencies among the challenges.

Details

Internet Research, vol. 29 no. 6
Type: Research Article
ISSN: 1066-2243

Keywords

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