To see the other types of publications on this topic, follow the link: Social service – Computer network resources.
Dissertations / Theses on the topic 'Social service – Computer network resources'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Social service – Computer network resources.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Yang, Weilai. "Pricing Network Resources for Differentiated Service Networks." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5227.
Full textAbstract:
We developed a price-based resource allocation scheme for Differentiated Service (DiffServ) data networks. The DiffServ framework was proposed to provide multiple QoS classes over IP networks. Since the provider supports multiple service classes, we need a differentiated pricing scheme, as supposed to the flat-rate scheme employed by the Internet service providers of today. Charging efficiently is a big issue. The utility of a client correlates to the amount of bandwidth allocated. One difficulty we face is that determining the appropriate amount of bandwidth to provision and allocate is problematic due to different time scales, multiple QoS classes and the unpredictable nature of users.
To approach this problem, we designed a pricing strategy for Admission Control and bandwidth assignment. Despite the variety of existing pricing strategies, the common theme is that the appropriate pricing policy rewards users for behaving in ways to improve the overall utilization and performance of the network. Among existing schemes, we chose auction because it is scalable, and efficiently and fairly shares resources. Our pricing model takes the system's availability and each customer's requirements as inputs and outputs the set of clients who are admitted into the network and their allocated resource. Each client proposes a desired bandwidth and a price that they are willing to pay for it. The service provider collects this information and produces parameters for each class of service they provide. This information is used to decide which customers to admit.
We proposed an optimal solution to the problem of maximizing the provider's revenue for the special case where there is only one bottleneck link in the network. Then for the generalized network, we resort to a simple but effective heuristic method. We validate both the optimal solution and the heuristic algorithm with simulations driven by a real traffic scenario. Finally, we allow customers to bid on the duration for which the service is needed. Then we study the performance of those heuristic algorithms in this new setting and propose possible improvements.
2
Vuza, Xolisa. "Social and technical issues of IP-based multi-modal semi-synchronous communication: rural telehealth communication in South Africa." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&.
Full textAbstract:
Most rural areas of developing countries are faced with problems like shortage of doctors in hospitals, illiteracy and poor power supply. Because of these issues, Information and Communication Technology (ICT) is often sees as a useful solution for these areas. Unfortunately, the social environment is often ignored. This leads to inappropriate systems being developed for these areas. The aims of this thesis were firstly, to learn how a communication system can be built for a rural telehealth environment in a developing country, secondly to learn how users can be supported to use such a system.
3
Elsmore, Chris. "Neighbourhood Watch : social resource monitoring." Thesis, Swansea University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678659.
Full text
4
Li, Shu-leung Sammy. "The evolving internet services industry in HK : strategic management on changes and service innovation /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18831308.
Full text
5
MAARADJI, Abderrahmane. "End-user service composition from a social networks analysis perspective." Phd thesis, Institut National des Télécommunications, 2011. http://tel.archives-ouvertes.fr/tel-00762647.
Full textAbstract:
Service composition has risen from the need to make information systems more flexible and open. The Service Oriented Architecture has become the reference architecture model for applications carried by the impetus of Internet (Web). In fact, information systems are able to expose interfaces through the Web which has increased the number of available Web services. On the other hand, with the emergence of the Web 2.0, service composition has evolved toward web users with limited technical skills. Those end-users, named Y generation, are participating, creating, sharing and commenting content through the Web. This evolution in service composition is translated by the reference paradigm of Mashup and Mashup editors such as Yahoo Pipes! This paradigm has established the service composition within end users community enabling them to meet their own needs, for instance by creating applications that do not exist. Additionally, Web 2.0 has brought also its social dimension, allowing users to interact, either directly through the online social networks or indirectly by sharing, modifying content, or adding metadata. In this context, this thesis aims to support the evolving concept of service composition through meaningful contributions. The main contribution of this thesis is indeed the introduction of the social dimension within the process of building a composite service through end users' dedicated environments. In fact, this concept of social dimension considers the activity of compositing services (creating a Mashup) as a social activity. This activity reveals social links between users based on their similarity in selecting and combining services. These links could be an interesting dissemination means of expertise, accumulated by users when compositing services. In other terms, based on frequent composition patterns, and similarity between users, when a user is editing a Mashup, dynamic recommendations are proposed. These recommendations aim to complete the initial part of Mashup already introduced by the user. This concept has been explored through (i) a step-by-step Mashup completion by recommending a single service at each step, and (ii) a full Mashup completion approaches by recommending the whole sequence of services that could complete the Mashup. Beyond pushing a vision for integrating the social dimension in the service composition process, this thesis has addressed a particular constraint for this recommendation system which conditions the interactive systems requirements in terms of response time. In this regard, we have developed robust algorithms adapted to the specificities of our problem. Whereas a composite service is considered as a sequence of basic service, finding similarities between users comes first to find frequent patterns (subsequences) and then represent them in an advantageous data structure for the recommendation algorithm. The proposed algorithm FESMA, provide exactly those requirements based on the FSTREE structure with interesting results compared to the prior art. Finally, to implement the proposed algorithms and methods, we have developed a Mashup creation framework, called Social Composer (SoCo). This framework, dedicated to end users, firstly implements abstraction and usability requirements through a workflow-based graphic environment. As well, it implements all the mechanisms needed to deploy composed service starting from an abstract description entered by the user. More importantly, SoCo has been augmented by including the dynamic recommendation functionality, demonstrating by the way the feasibility of this concept.
6
Kang, Youn Ah. "Informing design of visual analytics systems for intelligence analysis: understanding users, user tasks, and tool usage." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44847.
Full textAbstract:
Visual analytics, defined as "the science of analytical reasoning facilitated by interactive visual interfaces," emerged several years ago as a new research field. While it has seen rapid growth for its first five years of existence, the main focus of visual analytics research has been on developing new techniques and systems rather than identifying how people conduct analysis and how visual analytics tools can help the process and the product of sensemaking. The intelligence analysis community in particular has not been fully examined in visual analytics research even though intelligence analysts are one of the major target users for which visual analytics systems are built. The lack of understanding about how analysts work and how they can benefit from visual analytics systems has created a gap between tools being developed and real world practices.
This dissertation is motivated by the observation that existing models of sensemaking/intelligence analysis do not adequately characterize the analysis process and that many visual analytics tools do not truly meet user needs and are not being used effectively by intelligence analysts. I argue that visual analytics research needs to adopt successful HCI practices to better support user tasks and add utility to current work practices. As the first step, my research aims (1) to understand work processes and practices of intelligence analysts and (2) to evaluate a visual analytics system in order to identify where and how visual analytics tools can assist. By characterizing the analysis process and identifying leverage points for future visual analytics tools through empirical studies, I suggest a set of design guidelines and implications that can be used for both designing and evaluating future visual analytics systems.
7
Sukontapatipak, Songkwun. "International students' reliance on home-country related internet use." CSUSB ScholarWorks, 2005. https://scholarworks.lib.csusb.edu/etd-project/2899.
Full textAbstract:
The present study draws on uses and gratifications and media system dependency perspectives for examining factors related to Internet usage behaviors of international students and their motives to use their home-country Internet resources.
8
Banoobhai-Anwar, Ilhaam. "The role of e-commerce in five-star hotels in the Cape Town Metropole." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2489.
Full textAbstract:
Thesis (MTech (Tourism and Hospitality Management))--Cape Peninsula University of Technology, 2016.<br>Electronic commerce, popularly referred to as e-commerce, is the latest catchphrase surrounding the Internet and its many functions. In the past, the Internet was solely used for information seeking, but the 21st century has brought a new global economy to the fore – one that is conducted online. Tourism is seen as a driver of economic growth, contributing both to the Gross Domestic Product (GDP) of South Africa (SA) and creating jobs in the hospitality sector. E-commerce does not only provide a platform for business to be conducted online but also an opportunity for consumers to interact directly with industry. Many studies have been done previously about the perceived benefits of e-commerce in the retail sector, yet none in Cape Town and at five-star hotels in particular. It is well known that holidaymakers conduct an online search prior to booking accommodation; some of those potential guests in turn choose to finalise their bookings online. The purpose of the study was to investigate the role of e-commerce in five-star hotels in the Cape Town Metropole. The main objective of this study was to define what e-commerce is for five-star hotels in the Cape Town Metropole and determine if the hotels are using e-commerce as a booking method. Online questionnaires were used to gather primary data and a literature review was presented as secondary data. The findings of this study showed that all the hotels surveyed use online bookings and half of the respondents believe Online Travel Agents (OTAs) generate more revenue than traditional methods of room reservation. When asked to rank methods of room’s reservations, there was a slight difference between telephone bookings and e-commerce as number one. This could mean that while electronic methods are popular, they have not completely replaced traditional methods. The researcher recommends that five-star hotel managers train the rooms’ division staff to respond to negative reviews on social media, as this was one of the findings. The hotels should also learn how to effectively use their social media presence to increase room sales.
9
Khunyeli, Ramotsamai Itumeleng. "'Technic' practices of the computer game Lanner: identity development through the LAN-gameplay experience." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1013405.
Full textAbstract:
This thesis is a reception analysis using qualitative interviews to investigate the formation of cultural groups around computer-game LANs present in Rhodes University. It also looks at how issues of social inequalities evident on the university's campus impact on the participation of students in these LANs. The findings of this study are that the participants have established a community around the practice of computer LAN-gameplay based on values developed through the combination of the material and gameworlds. It serves as a home-on-campus for them; where they can fully explore their passion for games thus reaffirming their identity as gamers on a campus where being a gamer is viewed negatively. In this light, computer-game playing is not just a practice these participants perform, but a culture they live out every day. This is a culture predominantly lived out by men. One of the reasons for this is because most women have been raised to believe to have negative predispositions about digital gaming e.g. that it is childish, addictive and anti-social, but also that computer are meant to be used by men - women use them only when it is absolutely necessary, for example, that it is childish, for academic-related purposes. As a result, not many of them will use computers for any otherreason for fear of being socially criticised. In addition, the gaming culture being dominated by whites is due to the fact that admittance in to this community is still unaffordable for the majority of black students on the Rhodes University campus as a result of their social backgrounds.
10
Uawithya, Pariphan. "Corporate social responsibility : a content analysis of corporate websites in Hong Kong, Japan, Malaysia, and Taiwan." Virtual Press, 2005. http://liblink.bsu.edu/uhtbin/catkey/1313954.
Full textAbstract:
Corporate social responsibility (CSR) reporting in annual reports has been investigated by researchers over the past three decades. Because the Internet has significantly eased dissemination of information to global audiences, companies have begun to report CSR-related materials on their corporate websites.The present study is a content analysis examining what CSR principles, processes, and issues are mentioned on corporate websites of top companies in Hong Kong, Japan, Malaysia, and Taiwan. Two coders analyzed seventy-one websites: Hong Kong (19), Japan (19), Taiwan (19), and Malaysia (14). Content on the websites were coded based on definitions and categorizations which were patterned after Maignan and Ralston's 2002 study on CSR reporting.<br>Department of Journalism
11
Struwig, Zaskia. "An explorative study of the current practises of greenwashing in social media." Thesis, Nelson Mandela University, 2017. http://hdl.handle.net/10948/13658.
Full textAbstract:
The first section of this paper looks specifically at the concept of greenwashing from a theoretical perspective. It aims to establish exactly what greenwashing is, what it involves and how it has been used. The second section incorporates both the first section of this paper, and delves deeper into how greenwashing has been present in social media. The third section of this paper is a case study. This section has been broken down into three categories of industries in consideration of greenwashing practises. The first is ‘The Obvious’ - this looks at the obvious examples of industries that use greenwashing practises. ‘The Overlooked’ looks at the industries which are often disregarded in terms of greenwashing practises. The last is ‘The Unexpected’ which looks into the industries that focus on supporting the environment and would not commonly be associated with any form of greenwashing practises at all. This case study aims to identify how the selected companies chosen for the study have been associated with greenwashing in the past, and how their current social presence may still be contributing to greenwashed advertising. As the concept of greenwashing is based on a theory developed around two decades ago and mostly consisted of very direct claims and statements using traditional advertising mediums such as billboards and magazine adverts, and considering the amount of well-known corporations who were proven guilty of such greenwashing practises, it would be ignorant to consider that such practises have simply subsided and ceased to occur. Corporations are aware of being called-out with negative press, especially with regards to issues such as false environmental practises, therefore as the advertising industry has changed with time, wouldn’t such greenwashing practises have adapted as well? Corporations in the past have learnt that direct greenwash statements have backfired negatively, therefore in collaboration with the use of social media, the prospect of using subtle, or even subconscious greenwash strategies seem to create an issue which requires investigation.
12
Harvey, Natalie. "An investigation into the use of social network sites to support project communications." Thesis, St Andrews, 2010. http://hdl.handle.net/10023/930.
Full text
13
Jeong, Seongjung. "Relationships of cultural orientations to online public relations message preferences among United States and South Korean college students." CSUSB ScholarWorks, 2003. https://scholarworks.lib.csusb.edu/etd-project/2472.
Full text
14
Loukil, Mehdi. "Gestion de contexte pour l'optimisation de l'accès et l'adaptation des services sur des environnements hétérogènes." Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00843598.
Full textAbstract:
Dans le domaine des TIC, les services de demain seront certainement basés sur des systèmes ubiquitaires, omniprésents et pervasifs. Ces systèmes devront prendre en considération différents paramètres provenant de l'environnement de l'utilisateur, c'est à dire son contexte. Le contexte de l'utilisateur peut être composé d'informations statiques ou dynamiques, objectives ou subjectives, quantitatives ou qualitatives. Il peut inclure des données telles que la localisation géographique, les caractéristiques du terminal utilisé, la température ambiante, l'humeur de l'utilisateur. Afin d'améliorer la QoS et la QoE, les services et les systèmes doivent être adaptés aux changements du contexte des utilisateurs. Le contexte doit donc être collecté et interprété et les règles d'adaptation du système doivent être définies. Sur les systèmes étendus, riches, dynamiques et hétérogènes, tels que ceux considéré dans le cadre de cette thèse, ces opérations doivent être automatisées. Vu la quantité et la complexité des données contextuelles à considérer, l'utilisation de la sémantique dans la gestion de contexte peut faciliter cette automatisation et ouvrir la porte au raisonnement et à l'adaptation automatiques. Aujourd'hui, peu de solutions viables existent pour cette problématique. Nous proposons alors d'utiliser et d'adapter des mécanismes et technologies provenant du web sémantique pour décrire et manipuler les informations de contexte. Dans un premier temps, nous avons proposé une méthodologie de conception qui nous permit de proposer " Ubiquity-Ont " : une ontologie générique au domaine des TIC, flexible et extensible. Les données de contexte ont alors été décrites sous forme de concepts et d'instances, reliés par des relations sémantiques. Nous avons ensuite proposé une architecture overlay, composée de deux niveaux de vitalisation et permettant d'intégrer un gestionnaire de contexte, basé sur la sémantique, sur des environnements réseaux et services. Cette solution overlay permet de (a) masquer l'hétérogénéité des composants du système et (b) d'augmenter virtuellement les entités du système existant par les capacités nécessaires à la manipulation et au raisonnement sur les données sémantiques du contexte. Nos propositions ont étés implémentées et testées sur une plateforme réelle et appliquées à deux cas d'études : Gestion de la mobilité sur des environnements de réseaux d'accès hétérogènes et Optimisation de la consommation d'énergie dans les terminaux mobiles
15
Perry, Elizabeth Eleanor. "Cityscape connections: National Park Service relevance and resilience in urban areas." ScholarWorks @ UVM, 2018. https://scholarworks.uvm.edu/graddis/850.
Full textAbstract:
The National Park Service (NPS) strives to embody U.S. democratic ideals, conserving our collective stories and scenery for their intrinsic value and the enjoyment of current and future generations. However, although these places are conserved for all, they are not enjoyed by all. As with other conservation agencies, the NPS finds itself increasingly concerned with building relevance with diverse potential stewards. In cities, where 80% of the U.S. population and 40% of the NPS portfolio is based, there is a prime opportunity to build relevance with large, diverse, and proximate audiences. Recognizing this opportunity, the NPS initiated its Urban Agenda as a centerpiece of its 2016 centennial. The Urban Agenda seeks to connect people with proximate NPS parks and programs, primarily by using collaborations as pathways to relevance. In doing so, the agency may become a more resilient and value-added component of these larger landscapes. However, connections between relevance, resilience, and collaborations, especially at the organizational level, have rarely been addressed.
This dissertation: 1) identifies perspectives on NPS relevance in the urban context; 2) examines the diversity of brokers and roles in facilitating relevance across collaborative networks; and 3) assesses areas of intra-NPS relationship-building for enhanced relevance. A multi-site, multi-methods evaluation was conducted. Detroit, Tucson, and Boston, all cities with Urban Agenda investment but representing different proximities to physical NPS parks, were selected as cases. Qualitative in-depth interviews with NPS staff and community partners were paired with quantitative social network analysis. The first phase of research identifies areas of commonality and difference among perceptions about relevance. Qualitative inquiry found that, across cities, NPS staff tended to conceptualize relevance in agency-focused ways while community partners conceptualized it on broader scales, both in audiences and goals. These differences in scale may be complementary, though, with the NPS further enhancing its relevance by recognizing the larger context and embedding its perspectives within this context. The second phase of research quantitatively examines collaborative network composition and potential, especially regarding network and broker diversity. Study results suggest that building the breadth and depth of a network, as well as targeting specific areas of desired growth, are ways to effectively build network resilience and further connections for relevance. The third phase of research examines relationships among parks, programs, and offices of the NPS. Combining qualitative and quantitative methods, this inquiry found that relationships between parks are most numerous and supported by institutional structures. However, connections to and within programs are a desired area for further connection. All relationship-building structures and language must emphasize the utility of internal connections for external relevance. Balancing relationship types while being inclusive of non-park groups may be essential in promoting organizational resilience and relevance. This evaluation contributes to theoretical understanding about and indicators of relevance and resilience. Together, results from these three phases of study can help the NPS understand specific relevance considerations in urban areas, efficiently use their resources to enhance relevance, and continue to strive toward our democratic ideals.
16
Choi, Kwok To Maurice. "Online dating as a strategic game : why and how men in Hong Kong Use QQ to chase women in mainland China." HKBU Institutional Repository, 2011. http://repository.hkbu.edu.hk/etd_ra/1217.
Full text
17
Chak, Man-yee Rene, and 翟敏儀. "A study of the Hong Kong government's Electronic Service Delivery Scheme." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31966421.
Full text
18
Caswell, Thomas Hubbard. "Designing an online support community for novice computer users." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2504.
Full textAbstract:
This project seeks to identify characteristics of successful online communities and apply them to designing and prototyping an online discussion forum where novice computer users can share computer questions and answers. Usability and sociability are identified as essential goals in the development of online communities. Appropriate and effective Computer Mediated Communication (CMC) software is evaluated and selected to run the discussion forum.
19
Zhang, Huiqi. "Socioscope: Human Relationship and Behavior Analysis in Mobile Social Networks." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc30533/.
Full textAbstract:
The widely used mobile phone, as well as its related technologies had opened opportunities for a complete change on how people interact and build relationship across geographic and time considerations. The convenience of instant communication by mobile phones that broke the barrier of space and time is evidently the key motivational point on why such technologies so important in people's life and daily activities. Mobile phones have become the most popular communication tools. Mobile phone technology is apparently changing our relationship to each other in our work and lives. The impact of new technologies on people's lives in social spaces gives us the chance to rethink the possibilities of technologies in social interaction. Accordingly, mobile phones are basically changing social relations in ways that are intricate to measure with any precision. In this dissertation I propose a socioscope model for social network, relationship and human behavior analysis based on mobile phone call detail records. Because of the diversities and complexities of human social behavior, one technique cannot detect different features of human social behaviors. Therefore I use multiple probability and statistical methods for quantifying social groups, relationships and communication patterns, for predicting social tie strengths and for detecting human behavior changes and unusual consumption events. I propose a new reciprocity index to measure the level of reciprocity between users and their communication partners. The experimental results show that this approach is effective. Among other applications, this work is useful for homeland security, detection of unwanted calls (e.g., spam), telecommunication presence, and marketing. In my future work I plan to analyze and study the social network dynamics and evolution.
20
Ramsunder, Monica. "The impact of social media marketing on purchase decisions in the tyre industry." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1637.
Full textAbstract:
Technology and the boom of the internet have encouraged people to connect with each other, share information and build relationships (Stelzner, 2009; 2010) and the social web has presented a new form of communication through social media which allow people to interact and converse with each other (Evans, 2010). This presents marketers with the opportunity to affect consumers purchase decisions through online marketing and social media. This social engagement by consumers has significant impact on marketing activities as marketers need to be aware of the factors affecting consumer’s purchase decision (Evans, 2010). Continental Tyre South Africa (CTSA), a local tyre manufacturer, is embarking on a social media marketing strategy. No other local tyre manufacturer has a presence on social media platforms. As a result CTSA would have first mover advantage. The main objective of the research that follows is to establish if South African tyre purchasers are supportive of social media as an online research tool to learn more about tyre brands. The significance of this research study is that marketing communications has taken on a different dimension with the growth of online market places and the natural step for CTSA is to engage in social media marketing. The literature review revealed that many modern consumers sought peer advice over social networks thus social media has promoted consumer-to-consumer communication and has made it possible for consumers and brands to interact with each other (Mangold and Faulds, 2009). It was concluded that whilst social media marketing presents marketers with a more cost effective form of marketing, further research regarding South African’s online purchasing activities would be required to assess if the time, money and resources required to manage social media marketing for CTSA would be beneficial to the organisation. As a result a qualitative empirical study was conducted by means of a questionnaire. The research elements were broken down into three segments; the internet and social media, consumer-brand engagement and online iv recommendations. The research revealed that social media marketing is an appropriate strategy for CTSA. The main findings further revealed that CTSA would need to engage in an aggressive traditional marketing campaign in order to drive consumers to engage in the social media campaigns. Strategies must include dedicated social media fan pages, online banners, and online advertisements. Based on the research analysis it is recommended that that most appropriate social media platforms for CTSA to launch social media marketing activities are Facebook and Twitter.
21
Dubois, Elizabeth. "The strategic opinion leader : personal influence and political networks in a hybrid media system." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:35b1e408-a70a-4ea0-9c41-10d7df024ee9.
Full textAbstract:
Opinion leaders are important political players who bridge the gap between the political elite and the general public. Traditionally opinion leaders use social pressure and social support via interpersonal communication to personally influence the opinions, attitudes and behaviours of their everyday associates (who make up the general public). However, in a hybrid media system opinion leaders have access to added channels which mean they can communicate with audiences beyond their everyday associates and/or engage in non-interpersonal interactions, potentially setting the stage for opinion leaders to become more influential since they can access more members of the general public. Conversely, since the ability of opinion leaders to influence others traditionally relies on strong social bonds, even if audiences are accessible for information transfer, the lack of social connection could mean influence does not flow. As such, opinion leaders' channel choice in a hybrid media system is potentially very important. To investigate the patterns of channel use as well as motivations for, and impacts of, channel choices by opinion leaders, a two phase mixed-methods study is employed. Phase one includes online social network analysis of the #CDNpoli (Canadian politics) hashtag on Twitter and an online survey. Phase two investigates the communication practices of 21 specific digitally enabled opinion leaders drawn from the #CDNpoli network. Two hour in-depth interviews are paired with visualizations of the participants trace data. Telephone interviews with associates (alters) of the primary interviewee were conducted (N=27). This design is therefore responsive to the multi-channel reality of a hybrid media system and improves upon large scale and single channel studies which are most common in this line of research. Now strategic and, at times, impersonal, a fundamental shift in how influence is derived challenges theories of social influence and information dissemination. Two types of strategic opinion leaders emerge: enthusiasts and champions. Their strategies contribute to a wider trend - a "just-in-time" informed citizenry - where those who do not opt in to receiving messages from the political elite only get information at the last possible minute, such as during a scandal or an election. Future research and communication strategy must be sensitive to the varied aims and tactics of digitally enabled opinion leaders as well as the subsequent inconsistent relationship between the uninformed and their political system.
22
Khan, Pour Hamed. "Computational Approaches for Analyzing Social Support in Online Health Communities." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157594/.
Full textAbstract:
Online health communities (OHCs) have become a medium for patients to share their personal experiences and interact with peers on topics related to a disease, medication, side effects, and therapeutic processes. Many studies show that using OHCs regularly decreases mortality and improves patients mental health. As a result of their benefits, OHCs are a popular place for patients to refer to, especially patients with a severe disease, and to receive emotional and informational support. The main reasons for developing OHCs are to present valid and high-quality information and to understand the mechanism of social support in changing patients' mental health. Given the purpose of OHC moderators for developing OHCs applications and the purpose of patients for using OHCs, there is no facility, feature, or sub-application in OHCs to satisfy patient and moderator goals. OHCs are only equipped with a primary search engine that is a keyword-based search tool. In other words, if a patient wants to obtain information about a side-effect, he/she needs to browse many threads in the hope that he/she can find several related comments. In the same way, OHC moderators cannot browse all information which is exchanged among patients to validate their accuracy. Thus, it is critical for OHCs to be equipped with computational tools which are supported by several sophisticated computational models that provide moderators and patients with the collection of messages that they need for making decisions or predictions. We present multiple computational models to alleviate the problem of OHCs in providing specific types of messages in response to the specific moderator and patient needs. Specifically, we focused on proposing computational models for the following tasks: identifying emotional support, which presents OHCs moderators, psychologists, and sociologists with insightful views on the emotional states of individuals and groups, and identifying informational support, which provides patients with an efficient and effective tool for accessing the best-fit messages from a huge amount of patient posts to satisfy their information needs, as well as provides OHC moderators, health-practitioners, nurses, and doctors with an insightful view about the current discussion under the topics of side-effects and therapeutic processes, giving them an opportunity to monitor and validate the exchange of information in OHCs. We proposed hybrid models that combine high-level, abstract features extracted from convolutional neural networks with lexicon-based features and features extracted from long short-term memory networks to capture the semantics of the data. We show that our models, with and without lexicon-based features, outperform strong baselines.
23
Mohamed, Hassan. "Social media use among NMMU students." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1636.
Full textAbstract:
This research provides insight into the use of social networks and social media by students at the Nelson Mandela Metropolitan University. The primary purpose of this research is to investigate student social media practices at NMMU to establish the reasons for students engaging in social media. A growing number of educators acknowledge the potential of social networking to (re)engage learners with their studies, while others fear that such practices compromise and disrupt student engagement with traditional education provision (Selwyn, 2009). This study, therefore, aims to identify how and for what reasons students use social networks and social media. This study attempts to provide answers to the following research questions: For which social networking sites do students register and actively engage in? What is the most popular social networking site for students? How often do students engage in social media practices? What is the main purpose for students engaging in social media practices? How do students gain access to social media? For what educational purposes can social media be used? For which business purposes can social media be used? Do students use social media to collaborate with peers and lecturers? Do students use social media to make buying decisions? The literature overview was conducted on social media and social networks from journals and books published between the periods 2003 to 2011 as the popularity of social media came to the forefront during this period. Topics researched included social networks and libraries, educational and business uses of social networking and social media. A quantitative study was considered to be most appropriate to conduct the research for this study; and non-probability sampling was the most appropriate given the size of the population and the nature of this research. xiv Students were invited to participate in the research by completing and submitting a survey questionnaire at the conclusion of their lectures in the second semester during the month of September. The data collected was then analysed using descriptive and inferential statistics to provide insight into student use of social media. The results would determine if relationships exist between the independent variables from the questionnaire, namely, age, gender, campus and course enrolment and the dependent factors, namely, usage, information exchange and security. This relationship would be determined for both the perceptions of social networking in general and the perceptions of NMMU social networking. These results are then used to identify further areas of research in the future. The majority of the population sample was between the ages of 17 and 21 and primarily females. The sample typically became aware of social media by means of word-of-mouth and accesses their social networking site/s more than five times a day. The main reason for registering and joining social networking sites was for social purposes. Furthermore, the sample used social networking sites for entertainment, social involvement, meeting new friends and maintaining relationships. The sample agreed that social networking makes information searching easier. The majority of the sample indicated that they were not registered on any NMMU Social Networking sites of the university or any faculty, department or unit social networking sites at the NMMU. However, it was clear that the majority of students was registered on social networking sites of some sort and would continue to use social networking and social media. The results from the study indicated that the mean value for the perceptions of social media in general were greater than that of the perceptions of NMMU social media in terms of usage. Likewise, the mean value for the perceptions of social networking in general was also greater than that of the perceptions of NMMU Social Networking for information exchange but the difference were very small. However, the mean value for the perceptions of NMMU Social Networking showed a greater mean value than that of the perceptions of social networking in general in terms of security. This means that respondents used social networking in general more than NMMU Social Networking. xv However, the respondents perceived NMMU Social Networking sites to be more secure than social networking sites in general. The results of this study could provide Higher Education Institutions in South Africa with the impetus to use social networks and social media to enhance students‟ learning experiences.
24
Prybutok, Gayle. "An Integrative Model of eHealth Communication: a Study of 18-30 Year Old College Students." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc699853/.
Full textAbstract:
eHealth is commonly defined as health services and information provided through the Internet and related technologies. Health educators have taken advantage of Internet and social media venues to disseminate health information essential to health risk management, disease prevention, and disease management and did not have a validated theoretical model to explain their experiences. The goal of this study was to create and test an integrated model of eHealth communication specific to 18-30 year old college students based on five research questions that identified and confirmed the factors most highly correlated with the presentation of health information on Internet or social media venues that improve eHealth literacy and provoke eHealth behavioral intention among college students. A sample of over 1400 18-30 year old college students was surveyed about their general and health information related use of the Internet and social media. As a result of exploratory factor analysis and subsequent structural equation modeling, the proposed theoretical model was revised and tested for statistical power. Two revised integrative models of eHealth communication, one for Internet and one for social media, were developed and validated. The model for social media shows statistically significant paths throughout the model; however, the model for the Internet reveals that the path between two constructs and Online Health Behavior are not statistically significant and is worthy of further examination. This study has important practical implications for eHealth educators, organizations dedicated to informing the public about specific diseases or health promotion techniques, health practitioners seeking improved strategies for effective eHealth message design, and to health information professionals.
25
Urista, Mark A. "A study of Myspace and Facebook from the perspectives of uses and gratification and impression management." Scholarly Commons, 2008. https://scholarlycommons.pacific.edu/uop_etds/687.
Full textAbstract:
This thesis explored MySpace and Facebook, two popular social networking sites (SNS), from the perspectives of the uses and gratification model and impression management theory. As a qualitative exploratory study, this thesis had three objectives. First, it investigated why young people use SNS. Second, it sought to discover how members use SNS for self-presentation. Finally, it aimed to contribute to the current body of literature and serve as a basis for future qualitative and quantitative studies on SNS.
The focus groups that were conducted for this thesis elicited ten themes that provided insights on the motivations and behaviors of individuals who use SNS for needs fulfillment and impression management. These themes included: 1) efficient communication, 2) convenient communication, 3) curiosity of others, 4) popularity, 5) relationship formation and reinforcement, 6) self-enhancement, 7) otherenhancement, 8) self-disclosure, 9) conformity and 1 0) identity-management.
Based on the first five themes, the study suggested that an emerging theory of instant gratification is being developed. The theory helps researchers explain why young people use SNS and predict what factors motivate young people to get ,_ involved heavily in SNS. Based on the second five themes, this study confirmed the relevance of Goffi:nan's theories of the presentation of the self in explaining how young people manage their impressions through SNS. As a powerful socialization agent, SNS provide new opportunities and diverse ways of presenting one's self online. Though there are some evident differences between online and face-to-face social interaction, it is clear that Goffman's theories will continue to help researchers explain self-presentation within the context of SNS.
26
Grindle, Mark. "The power of digital storytelling to influence human behaviour." Thesis, University of Stirling, 2014. http://hdl.handle.net/1893/21800.
Full textAbstract:
The aim of this multi-disciplinary research was to explore the power of digital, interactive or participatory storytelling to influence human behaviour in the context of public health. It addressed three related questions: RQ1: Does digital storytelling have the power to influence human behaviour? RQ2: If digital storytelling can influence human behaviour then how might it do so? RQ3: Is a ‘digital storytelling framework’ feasible as an approach to behaviour change? Four linked qualitative studies were conducted: a scoping review, in-depth interviews with 11 international ‘digital storytellers’, two case studies of ‘digital storytelling designed to influence human behaviour’ and six focus groups with 35 adolescent ‘digital story participants’. The research found that: RA1: Digital storytelling appears to influence human behaviour. RA2: Digital storytelling appears to influence by engaging at ever deepening emotional and non-conscious levels. Commerce appears to understand and embrace this power: But public health appears to rely on traditional uni-directional, non-participatory message led approaches and appeals to cognition. This presents threats and opportunities to public health. RA3: The proposed ‘digital storytelling framework’ is feasible and desirable as a behaviour change paradigm. The thesis concludes that Digital Storytelling appears to influence human behaviour. It appears to derive its power to influence by facilitating unprecedented depths of emotional engagement potentially en route to behaviour change. The current imbalance in how commerce and public health corral the power of digital storytelling suggests that the latter might embrace its potential; and tougher regulation might constrain how the former uses it to market harmful products. The proposed digital storytelling framework makes a valuable creative, analytical and critical contribution to both of these ends. Its core principles have informed the design of numerous story-led digital health interventions; and they now sit at the core of a counter-marketing campaign to reduce harmful effects of marketing on children’s health.
27
Cole, Jason. "Foreign language learning in the age of the internet : a comparison of informal acquirers and traditional classroom learners in central Brazil." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:db80473a-2075-4e91-bb07-a706bb6a433f.
Full textAbstract:
Several recent studies (e.g., Benson and Chik, 2010; Sockett, 2014) suggest that as a result of changes in technology and the concomitant emergence of a globalized culture, highly effective out-of-class, informal English acquisition is becoming more common. The present study compared high-level, well-motivated Central Brazilian classroom-trained learners (CTLs) with fully autonomous self-instructed learners (FASILs) of similar backgrounds. Using linguistic tests, a questionnaire and a structured interview, the study analysed group differences as well as individual differences in language proficiency, learner histories, behaviour, beliefs, and attitudes. The key research question asked whether there existed, in more than rare circumstances, FASILs who attained levels of proficiency at least as high as highly-motivated, well-trained CTLs? Furthermore, if the knowledge and skills of FASILs were, in some respects, superior to those of CTLs, what variables accounted for the advantage? FASILs significantly outperformed CTLs across a battery of linguistic tests measuring a range of knowledge and skills. Test results indicated that while CTLs tended to plateau at upper intermediate levels, FASILs generally improved through advanced levels, often achieving native-like levels of knowledge and use. The strongest contributing factor to proficiency was found to be self-determined motivation driven by a personalized relationship with English often marked by a transnational identity. The evidence suggests this type of motivation, significantly more associated with FASILs than CTLs, led users to engage deeply with the linguistic details of informal sources. The findings challenge dominant paradigms in several fields of SLA which prioritize expert regulation over independent discovery and controlled, collaborative environments over real-world contexts of use entered into for personal reasons. A hoped for consequence of this study is that SLA research and teaching practice will begin to recognize and promote rather than regulate or dismiss the unique learning arcs that more and more English learners experience in their everyday lives.
28
Palomares, Velasquez Daniel. "Study of mechanisms ensuring service continuity for IKEv2 and IPsec protocols." Phd thesis, Institut National des Télécommunications, 2013. http://tel.archives-ouvertes.fr/tel-00939092.
Full textAbstract:
During 2012, the global mobile traffic represented 70\% more than 2011. The arrival of the 4G technology introduced 19 times more traffic than non-4G sessions, and in 2013 the number of mobile-connected to the Internet exceeded the number of human beings on earth. This scenario introduces great pressure towards the Internet service providers (ISPs), which are called to ensure access to the network and maintain its QoS. At short/middle term, operators will relay on alternative access networks in order to maintain the same performance characteristics. Thus, the traffic of the clients might be offloaded from RANs to some other available access networks. However, the same security level is not ensured by those wireless access networks. Femtocells, WiFi or WiMAX (among other wireless technologies), must rely on some mechanism to secure the communications and avoid untrusted environments. Operators are mainly using IPsec to extend a security domain over untrusted networks. This introduces new challenges in terms of performance and connectivity for IPsec. This thesis concentrates on the study of the mechanism considering improving the IPsec protocol in terms of continuity of service. The continuity of service, also known as resilience, becomes crucial when offloading the traffic from RANs to other access networks. This is why we first concentrate our effort in defining the protocols ensuring an IP communication: IKEv2 and IPsec. Then, we present a detailed study of the parameters needed to keep a VPN session alive, and we demonstrate that it is possible to dynamically manage a VPN session between different gateways. Some of the reasons that justify the management of VPN sessions is to provide high availability, load sharing or load balancing features for IPsec connections. These mechanisms increase the continuity of service of IPsec-based communication. For example, if for some reason a failure occurs to a security gateway, the ISP should be able to overcome this situation and to provide mechanisms to ensure continuity of service to its clients. Some new mechanisms have recently been implemented to provide High Availability over IPsec. The open source VPN project, StrongSwan, implemented a mechanism called ClusterIP in order to create a cluster of IPsec gateways. We merged ClusterIP with our own developments in order to define two architectures: High Availability and Context Management over Mono-LAN and Multi-LAN environments. We called Mono-LAN those architectures where the cluster of security gateways is configured under a single IP address, whereas Multi-LAN concerns those architectures where different security gateways are configured with different IP addresses. Performance measurements throughout the thesis show that transferring a VPN session between different gateways avoids re-authentication delays and reduce the amount of CPU consumption and calculation of cryptographic material. From an ISP point of view, this could be used to avoid overloaded gateways, redistribution of the load, better network performances, improvements of the QoS, etc. The idea is to allow a peer to enjoy the continuity of a service while maintaining the same security level that it was initially proposed
29
Wang, Yuhui. "On the use of network coding and multicast for enhancing performance in wired networks." Phd thesis, Institut National des Télécommunications, 2013. http://tel.archives-ouvertes.fr/tel-00919771.
Full textAbstract:
The popularity of the great variety of Internet usage brings about a significant growth of the data traffic in telecommunication network. Data transmission efficiency will be challenged under the premise of current network capacity and data flow control mechanisms. In addition to increasing financial investment to expand the network capacity, improving the existing techniques are more rational and economical. Various cutting-edge researches to cope with future network requirement have emerged, and one of them is called network coding. As a natural extension in coding theory, it allows mixing different network flows on the intermediate nodes, which changes the way of avoiding collisions of data flows. It has been applied to achieve better throughput and reliability, security, and robustness in various network environments and applications. This dissertation focuses on the use of network coding for multicast in fixed mesh networks and distributed storage systems. We first model various multicast routing strategies within an optimization framework, including tree-based multicast and network coding; we solve the models with efficient algorithms, and compare the coding advantage, in terms of throughput gain in medium size randomly generated graphs. Based on the numerical analysis obtained from previous experiments, we propose a revised multicast routing framework, called strategic network coding, which combines standard multicast forwarding and network coding features in order to obtain the most benefit from network coding at lowest cost where such costs depend both on the number of nodes performing coding and the volume of traffic that is coded. Finally, we investigate a revised transportation problem which is capable of calculating a static routing scheme between servers and clients in distributed storage systems where we apply coding to support the storage of contents. We extend the application to a general optimization problem, named transportation problem with degree constraints, which can be widely used in different industrial fields, including telecommunication, but has not been studied very often. For this problem, we derive some preliminary theoretical results and propose a reasonable Lagrangian decomposition approach
30
MINERVA, Roberto. "Will the Telco survive to an ever changing world ? Technical considerations leading to disruptive scenarios." Phd thesis, Institut National des Télécommunications, 2013. http://tel.archives-ouvertes.fr/tel-00917966.
Full textAbstract:
The telecommunications industry is going through a difficult phase because of profound technological changes, mainly originated by the development of the Internet. They have a major impact on the telecommunications industry as a whole and, consequently, the future deployment of new networks, platforms and services. The evolution of the Internet has a particularly strong impact on telecommunications operators (Telcos). In fact, the telecommunications industry is on the verge of major changes due to many factors, such as the gradual commoditization of connectivity, the dominance of web services companies (Webcos), the growing importance of software based solutions that introduce flexibility (compared to static system of telecom operators). This thesis develops, proposes and compares plausible future scenarios based on future solutions and approaches that will be technologically feasible and viable. Identified scenarios cover a wide range of possibilities: 1) Traditional Telco; 2) Telco as Bit Carrier; 3) Telco as Platform Provider; 4) Telco as Service Provider; 5) Telco Disappearance. For each scenario, a viable platform (from the point of view of telecom operators) is described highlighting the enabled service portfolio and its potential benefits
31
Peruyera, Matias Sebastião. "Usos e apropriações de tecnologias no cotidiano do jornalismo guiado por dados." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1897.
Full textAbstract:
CAPES<br>Esta dissertação aborda como profissionais do jornalismo, através das práticas do cotidiano, se apropriam de artefatos e tecnologias computacionais para trabalhar com Jornalismo Guiado por Dados e, especificamente, com visualizações de dados. Para isso, considera-se que é no cotidiano que as tecnologias são apropriadas por quem as usa, e que este uso leva as tecnologias a uma estabilização, na qual elas deixam de ser percebidas como um elemento estranho. Os modos de uso dos artefatos também são considerados enquanto elementos construtores de identidades. O objeto principal da pesquisa são seis profissionais que fazem uso de artefatos e técnicas do Jornalismo Guiado por Dados no seu dia a dia. Através de entrevistas e observações, foram levantadas algumas maneiras através das quais as práticas e apropriações de tecnologias constroem as identidades de quem faz uso delas e levam os artefatos à estabilização. A análise das práticas do cotidiano colaboraria para uma visão menos instrumentalista no desenho de artefatos e também no ensino de técnicas, legitimando assim os modos de uso de cada pessoa. Para entender essas práticas do cotidiano, são apresentados os conceitos de “táticas” e “estratégias” com o objetivo de situar as relações de poder do cotidiano e como as pessoas podem subvertê-las, e conceitos dos estudos em Ciência, Tecnologia e Sociedade como SCOT – construção social da tecnologia – e códigos técnicos, para analisar os processos que levam à estabilização de uma tecnologia. Relacionando esses conceitos com o jornalismo, é analisada a conotação de neutralidade dos grandes conjuntos de dados e comparando-a com a ideia de neutralidade da tecnologia. O Jornalismo Guiado por Dados é então relacionado a algumas taxonomias de gêneros e formatos jornalísticos, e é apresentado um breve histórico do uso do computador no jornalismo, para situá-lo dentro do jornalismo de modo geral e nas identidades jornalísticas que são construídas através das tecnologias consumidas no cotidiano. Por sua vez, é apresentado como os produtos jornalísticos derivados de grandes bases de dados propõem outro tipo de relação entre o jornalismo e o público, especificamente através da visualização de dados. São consideradas as possibilidades da visualização como forma de explorar e/ou comunicar grandes conjuntos de dados, assim como formas de leituras que elas propiciam. São descritos alguns processos para produzir visualizações de dados e mostrados exemplos de visualizações usadas no jornalismo, além de descrições de ferramentas de software usadas no Jornalismo Guiado por Dados. Como conclusão principal, defende-se que a legitimação das táticas, assim como uma visão menos instrumentalista e determinista do computar e de outras tecnologias, colaboraria para que mais pessoas se aproveitem dos recursos do Jornalismo Guiado por Dados e das visualizações.<br>This dissertation looks at how journalism professionals, through everyday practices, appropriate artifacts and computational technologies to work with Data-Driven Journalism and, specifically, with data visualization. For this, we considered that it is in everyday life that technologies are appropriated for those who make use of them, and that this use leads technologies to a closure or stabilization, in which they are no longer perceived as a foreign element. We also consider the way people make use of artifacts as elements that construct identities. The main study subjects are six professionals that make use of artifacts and techniques related to Data-Driven Journalism in their everyday life. Through interviews and observations, we collected some ways through which people appropriate technology, and thus takes them to stabilization and build identities. The analysis of everyday practices would collaborate to a less instrumentalist approach in artifact design and technique teaching, thus legitimating the ways each person makes use of technologies. For a better understanding of those everyday practices, the concepts of "tactics" and "strategies" are introduced, in order to situate the everyday power relations and how people can subvert them, as well as concepts from the Science, Technology and Society studies – STS –, such as SCOT – social construction of technology – and technical codes, in order to analyze the processes that lead to the closure of technology. Relating these concepts to journalism, the neutral connotation of large data sets is analyzed and compared to the idea of technology neutrality. Data-Driven Journalism is then related to some taxonomies of journalistic genres and formats, and a brief history of computer use in journalism is presented to situate it within journalism and how journalism’s identities are constructed through technology consumed in daily life. In turn, is presented how journalistic products derived from large databases propose another type of relationship between journalism and the public, specifically through data visualization. We describe some possibilities of visualization as a way to explore and/or communicate large data sets, as well as some different ways of reading they provide. We also describe some processes and tools for producing data visualization in journalism, as well as some software tools used in Data-Driven Journalism. The major conclusion of this study is that legitimating tactics, as well as a less instrumentalist and determinist approach to computing and other technologies, would help more people in making use of the artifacts and techniques of Data-Driven Journalism and data visualization.
32
Ahmad, Abdel Mehsen. "Techniques de transmission et d'accès sans fil dans les réseaux ad-hoc véhiculaires (VANETS)." Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00762633.
Full textAbstract:
Les réseaux véhiculaires font l'objet de recherches actives aussi bien dans le domaine des réseaux que dans celui des transports. Le potentiel des réseaux véhiculaires à fournir des services comme l'information sur le trafic en temps réel ou sur les accidents font de cette technologie un domaine de recherche très important. Ces réseaux peuvent comporter des communications véhicule-à-véhicule (V2V), véhicule-à-infrastructure (V2I), ou une combinaison des deux. La norme IEEE 1609.4 est la spécification multicanal pour l'IEEE802.11p/WAVE des réseaux véhiculaires (VANETs). Elle utilise sept canaux, l'un étant un canal de contrôle (CCH) qui est écouté par les équipements de façon périodique, et les six autres canaux sont utilisés comme canaux de service (SCH). Elle définit également une division du temps en alternance entre les intervalles CCH et les intervalles SCH. L'objet de cette thèse de doctorat est d'évaluer les performances des réseaux VANETs dans le cas des communications véhiculaires sans infrastructure, et au niveau des couches inférieures du standard 802.11p. Dans la première partie, nous proposons une approche MAC d'allocation multicanal opportuniste dans un contexte sans infrastructure. Cette approche est conforme à la norme IEEE1609.4 -2010 de l'architecture WAVE pour un fonctionnement multicanal, et elle est conçue pour des applications de services de données (non urgentes), tout en assurant la transmission des messages de sécurité routière et des paquets de contrôle. Pour maintenir la qualité de service des deux types de messages (urgents et non-urgents) en exploitant la capacité du canal, deux solutions sont proposées. Dans la deuxième partie, lorsque le véhicule sélectionne son canal et contrôle son alternance temporelle entre CCH et SCH, il commence à transmettre ses paquets, en particulier sur le canal CCH, lesquels ont une durée de péremption. Nous présentons une approche visant à minimiser les collisions des émetteurs tout en évitant la contention de début d'intervalle, en particulier dans un contexte de densité élevée de véhicules. Même si les mécanismes proposés ci-dessus diminuent le taux de collision, il n'est pas possible de les supprimer complètement. Dans la troisième partie, nous traitons le problème des collisions entre les paquets diffusés sur le CCH, en particulier quand la charge des messages transmis dépasse la capacité du canal. Pour cela, nous proposons un nouveau mécanisme de codage réseau analogique adapté à la modulation QPSK pour les messages diffusés sur le CCH. Dans cette approche des symboles connus sont envoyés avant d'envoyer les paquets pour estimer les paramètres du canal et une solution explicite est utilisée pour inverser le système de la superposition de deux paquets
33
Papapostolou, Apostolia. "Indoor localization and mobility management in the emerging heterogeneous wireless networks." Phd thesis, Institut National des Télécommunications, 2011. http://tel.archives-ouvertes.fr/tel-00997657.
Full textAbstract:
Over the last few decades, we have been witnessing a tremendous evolution in mobile computing, wireless networking and hand-held devices. In the future communication networks, users are anticipated to become even more mobile demanding for ubiquitous connectivity to different applications which will be preferably aware of their context. Admittedly, location information as part of their context is of paramount importance from both application and network perspectives. From application or user point of view, service provision can upgrade if adaptation to the user's context is enabled. From network point of view, functionalities such as routing, handoff management, resource allocation and others can also benefit if user's location can be tracked or even predicted. Within this context, we focus our attention on indoor localization and handoff prediction which are indispensable components towards the ultimate success of the envisioned pervasive communication era. While outdoor positioning systems have already proven their potential in a wide range of commercial applications, the path towards a successful indoor location system is recognized to be much more difficult, mainly due to the harsh indoor characteristics and requirement for higher accuracy. Similarly, handoff management in the future heterogeneous wireless networks is much more challenging than in traditional homogeneous networks. Handoff schemes must be seamless for meeting strict Quality of Service (QoS) requirements of the future applications and functional despite the diversity of operation features of the different technologies. In addition, handoff decisions should be flexible enough to accommodate user preferences from a wide range of criteria offered by all technologies. The main objective of this thesis is to devise accurate, time and power efficient location and handoff management systems in order to satisfy better context-aware and mobile applications. For indoor localization, the potential of Wireless Local Area Network (WLAN) and Radio Frequency Identification (RFID) technologies as standalone location sensing technologies are first studied by testing several algorithms and metrics in a real experimental testbed or by extensive simulations, while their shortcomings are also identified. Their integration in a common architecture is then proposed in order to combine their key benefits and overcome their limitations. The performance superiority of the synergetic system over the stand alone counterparts is validated via extensive analysis. Regarding the handoff management task, we pinpoint that context awareness can also enhance the network functionality. Consequently, two such schemes which utilize information obtained from localization systems are proposed. The first scheme relies on a RFID tag deployment, alike our RFID positioning architecture, and by following the WLAN scene analysis positioning concept, predicts the next network layer location, i.e. the next point of attachment to the network. The second scheme relies on an integrated RFID and Wireless Sensor/Actuator Network (WSAN) deployment for tracking the users' physical location and subsequently for predicting next their handoff point at both link and network layers. Being independent of the underlying principle wireless access technology, both schemes can be easily implemented in heterogeneous networks. Performance evaluation results demonstrate the advantages of the proposed schemes over the standard protocols regarding prediction accuracy, time latency and energy savings
34
FUSTER, MORELL Mayo. "Governance of online creation communities : provision of infrastructure for the building of digital commons." Doctoral thesis, 2010. http://hdl.handle.net/1814/14709.
Full textAbstract:
Defence date: 20 September 2010<br>Examining Board: Donatella Della Porta (EUI) (Supervisor); Giovanni Sartor (EUI); Bruce Bimber (University of California, Santa Barbara); Joan Subirats (Autonomous University of Barcelona)<br>PDF of thesis uploaded from the Library digital archive of EUI PhD theses<br>This doctoral research is framed by the notion of a transition in which distinct commons organizational forms are gaining in importance at a time when the institutional principles of the nation state are in a state of profound crisis, and those of the private market are undergoing dramatic change. Additionally, the transformation of industrial society into a knowledge-based one is raising the importance of knowledge management, regulation and creation. This doctoral research addresses collective action for knowledge-making in the digital era from a double perspective of organizational and political conflict through the case of global online creation communities. From the organizational perspective, it provides an empirically grounded description of the organizational characteristics of emerging collective action. The research challenges previous literature by questioning the neutrality of infrastructure for collective action and demonstrating that infrastructure governance shapes collective action. Importantly, the research provides an empirical explanation of the organizational strategies most likely to succeed in creating large-scale collective action in terms of the size of participation and complexity of collaboration. From the political conflict perspective, this research maps the diverse models of governance of knowledge-making processes, addresses how these are embedded in each model of governance, and suggests a set of dimensions of democratic quality adapted to these forms. Importantly, it provides an empirically grounded characterization of two conflicting logics present in the conditions for collective action in the digital era: a commons versus a corporate logic of collective action. Additionally, the research sheds lights on the emerging free culture and access to knowledge movement as a sign of this conflict. In hypothesizing that the emerging forms of collective action are able to increase in terms of both participation and complexity while maintaining democratic principles, this research challenges Olson’s assertion that formal organizations tend to overcome collective action dilemmas more easily, and challenges the classical statements of Weber and Michels that as organizations grow in size and complexity, they tend to create bureaucratic forms and oligarchies. This research concludes that online creation communities are able to increase in complexity while maintaining democratic principles. Additionally, in the light of this research, the emerging collective action forms are better characterized as hybrid ecosystems which succeed by networking and combining several components, each with differens degrees of formalization and organizational and democratic logics.
35
CALDERARO, Andrea. "Digital politics divide : the digital divide in building political e-practices." Doctoral thesis, 2010. http://hdl.handle.net/1814/14706.
Full textAbstract:
Defense Date: 24/09/2010<br>Examining Board:
Prof. Alexander Trechsel, EUI (Supervisor)
Prof. Donatella Della Porta, EUI
Prof. R. Michael Alvarez, California Institute of Technology
Prof. Jan A.G.M. van Dijk, University of Twente<br>This study explores the relation between Internet and politics from a cross-national perspective of analysis. In the domain of the political sciences, the Internet has been welcomed for its potential to facilitate political practice. However, it is also commonly noted that the Internet is not equally distributed and not everybody can equally make the most of its potential. This is why the Digital Divide is perceived as the obstacle which limits the potential of the Internet to influence politics. Today, we are entering the third decade after the advent of the WWW, and the Internet is used far more broadly worldwide. We also have much more empirical evidence about Internet use. However, most research until now has concentrated on Western countries which have similar political systems, and therefore neglects a larger comparative perspective. This study empirically resizes the relation of causality between the Digital Divide and the influence of the Internet on politics. I explore how other contextual factors are determinant in this regard. In order to test this empirically, I set up a dataset tracking internet use, internet infrastructure, internet politics, blogging practices and social, economic and democratic factors of over 190 countries. Through cross-national analysis, first, I size the current status of the Digital Divide across countries. Second, I explore whether and how this scenario affects the inequalities in using the Internet for practicing politics. By following a constructivist approach, I explore not only how political parties are unequally present online across countries to perform conventional forms of politics, but also how citizens and social movements use the Internet to practice civic engagement. I pay particular attention to how people use social network organization tools to empower their own information narratives. My empirical findings confirm that the Digital Divide plays a limited role in explaining the relation between the Internet and politics. Rather, the use of the Internet to practice politics is mainly determined by the political context in which political actors operate. In this framework, the Digital Divide is only one of the several factors characterizing the national context.
36
Harris, Sera. "Mediating the complexities of practice : practitioner understandings of technology in contemporary social work." Thesis, 2018. http://hdl.handle.net/1959.7/uws:52105.
Full textAbstract:
Social workers are asked to reconcile many contradictions concerning technology. Technology is contested in social work literature, with face to face models of practice dominating understandings. Agencies where social workers are employed in often foster problematic access and expectations regarding technology. And while technology is deeply embedded in our everyday personal lives, for social workers, professional contexts of practice present complex and challenging experiences with technology. The research aims to explore contemporary social work understandings and practices under the influence of new and changing technologies. Through survey and ‘technology walk through’ interviews’, this thesis documents social work practices, offering intricate and detailed accounts of 100 social workers from a range of Australian practice settings. Social workers explain the extent to which they use technology and how they understand the role of technology in, and from, their everyday practice. This research asks social workers for their definitions of technology, the impacts of technology on their personal and professional boundaries and their vision of the possibilities for technology in their practice. This research finds that social workers relationships with technology are deeply driven by the expectations and practises of those with whom social workers engage. Technology is ubiquitous in contemporary practice, and their practice contexts actively drive social workers definitions of technology. However, social workers operationalise complex understandings of technology in their practice, with technology understood to be a tool for agency administration, record keeping, and outcomes and performance measurement, as well as a space for client engagement, advocacy, and interaction. Social workers often find themselves utilising technology without having clear boundaries, policies, professional access, knowledge or adequate training. This research finds that to address this gap, social workers apply their professional values and general client-centred practice theories to the area of technology, to mediate the complexities that practice presents. This thesis makes several recommendations. It recommends that agencies take responsibility for the embedding of technology in practice, rather than relying on individual social workers. It argues that while clients of social workers advance professional practice with technology, their relationship in driving change within social work needs to be fully acknowledged, to advocate for further developments. It also recommends clarity from agencies, institutions and professional bodies regarding practice strategies with technology. This thesis presents a new definition of social work which integrates technology into the social world in which social workers navigate. In doing so, it offers an opportunity for social work to embed technology within theories of, and for contemporary social work practice.
37
Aboualizadehbehbahani, Maziar. "Proposing a New System Architecture for Next Generation Learning Environment." Thesis, 2016. http://hdl.handle.net/1805/10289.
Full textAbstract:
Indiana University-Purdue University Indianapolis (IUPUI)<br>The emergence of information exchange and act of offering features through external interfaces is a vast but immensely valuable challenge, and essential elements of learning environments cannot be excluded. Nowadays, there are a lot of different service providers working in the learning systems market and each of them has their own advantages. On that premise, in today's world even large learning management systems are trying to cooperate with each other in order to be best. For instance, Instructure is a substantial company and can easily employ a dedicated team tasked with the development of a video conferencing functionality, but it chooses to use an open source alternative instead: The BigBlueButton. Unfortunately, different learning system manufacturers are using different technologies for various reasons, making integration that much harder.
Standards in learning environments have come to resolve problems regarding exchanging information, providing and consuming functionalities externally and simultaneously minimizing the amount of effort needed to integrate systems. In addition to defining and simplifying these standards, careful consideration is essential when designing new, comprehensive and useful systems, as well as adding interoperability to existing systems, all which subsequently took part in this research.
In this research I have reviewed most of the standards and protocols for integration in learning environments and proposed a revised approach for app stores in learning environments. Finally, as a case study, a learning tool has been developed to avail essential functionalities of a social educational learning management system integrated with other learning management systems. This tool supports the dominant and most popular standards for interoperability and can be added to learning management systems within seconds.
38
Botha, Robert Anthony. "The James 1:27 trust programme : a case study of an information, communication and technology (ICT) response to orphans and vulnerable children in the context of an HIV and AIDS epidemic." Diss., 2010. http://hdl.handle.net/10500/3908.
Full textAbstract:
This case study examines the James 1:27 Trust as an information, communication and
technology response to the plight of orphans and vulnerable children within the context of an
HIV and AIDS epidemic. The James 1:27 Trust demonstrates how social networks can be
mobilized in support of children at risk. The use of business information and management
systems to administer concepts such as “virtual adoption” is deemed an important innovative
contribution. The James 1:27 Trust and its model is studied as a contributor in finding solutions
to scale and multiply levels of care by community and faith-based organisations to orphans and
vulnerable children. The James 1:27 Trust is located at the Innovation Hub in Pretoria, Africa’s
first internationally accredited science park.<br>Social Work<br>M.A. (Social Behaviour in HIV/AIDS))
39
Alkhereyf, Sakhar Badr M. "Text Classification: Exploiting the Social Network." Thesis, 2021. https://doi.org/10.7916/d8-9acm-et32.
Full textAbstract:
Within the context of social networks, existing methods for document classification tasks typically only capture textual semantics while ignoring the text’s metadata, e.g., the users who exchange emails and the communication networks they form. However, some work has shown that incorporating the social network information in addition to information from language is useful for various NLP applications, including sentiment analysis, inferring user attributes, and predicting interpersonal relations.
In this thesis, we present empirical studies of incorporating social network information from the underlying communication graphs for various text classification tasks. We show different graph representations for different problems. Also, we introduce social network features extracted from these graphs. We use and extend graph embedding models for text classification.
Our contributions are as follows. First, we have annotated large datasets of emails with fine-grained business and personal labels. Second, we propose graph representations for the social networks induced from documents and users and apply them on different text classification tasks. Third, we propose social network features extracted from these structures for documents and users. Fourth, we exploit different methods for modeling the social network of communication for four tasks: email classification into business and personal, overt display of power detection in emails, hierarchical power detection in emails, and Reddit post classification.
Our main findings are: incorporating the social network information using our proposed methods improves the classification performance for all of the four tasks, and we beat the state-of-the-art graph embedding based model on the three tasks on email; additionally, for the fourth task (Reddit post classification), we argue that simple methods with the proper representation for the task can outperform a state-of-the-art generic model.
40
Yeaton, Matthew Richard. "Cultural Diffusion through Language: How Communication Networks Influence Culture in the Age of Digitization." Thesis, 2021. https://doi.org/10.7916/d8-d7mk-th64.
Full textAbstract:
My dissertation focuses on the strategic implications of the link between organizational culture and social network structure. I study their role in the process of knowledge transfer and diffusion, organizational memory, and organizational design. More broadly, I examine the way that social structure influences the information environment, and what effect this has on organizational learning. I focus in particular on the process of cultural evolution.
My dissertation leverages digitization as a phenomenon of inherent interest and as an empirical setting that can improve our theoretical understanding of both digital and non-digital communities. I have developed an expertise in computational methods, especially in machine learning techniques related to text and other unstructured data, and in the analysis of "big data," especially pertaining to large-scale networks. By combining these computational tools with organizational theory and the rich relational data generated by the explosion of digital records, my research grants insight into the dynamic process of learning in organizations and the implications for innovation and competitive advantage.
I explore how digitization informs and develops our understanding of organizational culture, knowledge transfer, and the labor market. Specifically, I investigate how digitization has opened a window to observe network structure and language, providing a lasting record of these changes through time. Using these digital records to observe the structure of social relations and the language used to communicate can help deepen our theory of knowledge transfer for a wide range of organizations, not just those that operate in the digital sphere. This means that these studies also have implications for understanding organizations in non-digital settings.
My dissertation contributes both theoretically and empirically to the knowledge theory of the firm. However, the mechanisms underlying knowledge transfer remain underdeveloped. I contribute by disentangling the related mechanisms of language and organizational structure, and I propose that common language directly impacts what knowledge may be efficiently transferred.
Next, my dissertation contributes to the growing field of digitization. Digitization is salient for researchers both as a unique phenomenon and as an ever-expanding source of accessible data to test theory. Moreover, since one of the central contributions of digitization is to reduce the cost of information gathering, it is well-suited to my theoretical setting of knowledge transmission and organizational memory.
Finally, my dissertation contributes to our understanding of culture in organizations. The focus on language as an aspect of culture allows both additional formalization as well as more specific empirical tests of the contribution of culture to organizational outcomes. In particular, a focus on dynamic settings in each of the chapters reveals the interplay between organizational structure, memory, and change. This helps us to understand how language evolves, how it is learned, and how it changes in response to information shocks.
41
Duncan, Robert David. "The role of online social networks in inter-firm collaborative innovation and problem solving." Thesis, 2011. http://hdl.handle.net/10500/6221.
Full textAbstract:
This study examined how online social networking (OSN) leads to increased communication and collaboration across inter-firm boundaries. This online social networking behaviour represents significant opportunities to firms in the form of improved problem-solving, increased collaborative innovation and enhanced engagement with stakeholders. There are also risks inherent in the widespread use of OSNs, such as the loss of control over information flows to individuals outside the organization, potential damage to the reputation of brands and organizations, and loss of productivity due to excessive usage of OSNs during work hours. In particular, this study sought to test four research propositions, specifically, that usage of one particular OSN, LinkedIn (LI), results in: 1) an increased number of inter-firm connections; 2) an improved ability to communicate across inter-firm boundaries; 3) greater access to problem solving or innovation collaborators; 4) increased organizational problem solving or innovation ability. The study methodology involved both quantitative and qualitative research. The quantitative portion of the study involved survey research among over 500 LinkedIn (LI) users to determine changes they reported in various dimensions related to inter-firm relationship-forming, information-sharing and collaborative problem solving since using LI. The sampling approach was purposive and the sample frame consisted of the researcher’s own extended LI network, and an effort was also made to make the survey link available to all LI members through public posting in the site’s Q&A section. Though no individual or group was systematically excluded from the opportunity to take the survey, some limitations are inherent in the approach taken. The survey respondents were self-selecting, which makes it difficult to confirm that the sample is reflective of all LI users. Also, the use of the researcher’s own LI network as a key source of survey respondents may have biased the study toward more open networkers, since the researcher’s network was built up over time by practicing open networking behaviours. As a result, the sample may tend to under-represent more closed or restrictive networkers. Notwithstanding these limitations, no one particular group of respondents was excluded from the opportunity to take the survey, and the resulting data suggests that there were significant numbers of respondents who considered themselves closed networkers. Also, the spread of respondents by geographic area, occupation and age was found to resemble published statistics from LI on its user base, so it appears that the data is reasonably reflective of the LI user base, though this would be difficult to verify or measure. Qualitative research was also undertaken among senior managers at companies that have embraced the use of OSNs by staff to determine their experiences along similar dimensions. The findings from the quantitative survey showed that users of LI have experienced an increased number of social connections with individuals as a result of using LI, and that these connections are often with people in other organizations, including competitors and customers. Survey respondents also reported that they have been able to draw upon their LI networks in order to solve problems and be more innovative in their work. Analysis of the qualitative research yielded a list of suggested best practices that could be adopted by firms wishing to harness the collaborative power of OSNs. These suggested best practices have been grouped under the areas of strategy, listening, communication, guidelines, training, diffusion and measurement. Some suggested areas for future research included: the role of performance measurement and reward systems in managing OSN usage behaviour; the organizational risks of centralized versus decentralized control of messaging via OSNs; the role of training in the effective deployment of OSNs in an organizational context; and the organizational risk of increased connectedness with competitors resulting from OSN relationships.<br>Business Management<br>D.B.L.
42
Chomphoosang, Pawat. "Trust management of social network in health care." 2013. http://hdl.handle.net/1805/3667.
Full textAbstract:
Indiana University-Purdue University Indianapolis (IUPUI)<br>The reliability of information in health social network sites (HSNS) is an
imperative concern since false information can cause tremendous damage to
health consumers. In this thesis, we introduce a trust framework which captures
both human trust level and its uncertainty, and also present advantages of using
the trust framework to intensify the dependability of HSNS, namely filtering
information, increasing the efficiency of pharmacy marketing, and modeling how
to monitor reliability of health information. Several experiments which were
conducted on real health social networks validate the applicability of the trust
framework in the real scenarios.
43
Dai, Rui. "The economics and technology of delivering quality of service over the Internet." 2002. http://wwwlib.umi.com/cr/utexas/fullcit?p3099446.
Full text
44
Sekhaolelo, Lesetja Alpheus. "Adoption of Social Networks for teaching and learning at high schools." 2015. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001603.
Full textAbstract:
M. Tech. Business Information Systems<br>The growing trends and the rapid developments of technological innovation have led to a new way of communication. These developments have seen individuals and organizations spending a lot of money on technological devices, software and applications much higher than ever before. On the other hand, institutions of learning are also advancing with technological innovations by shifting away from the face-to-face teaching and communicating with learners, to the use of Learning Management Systems (LMS). Amidst these challenges, these institutions of learning could leverage on freely available social networks for communication and for teaching and learning. However, these transitions have been impeded by many factors that need to be explored in order to adopt social networks for teaching and learning. The foremost objective of this study was to develop a framework for the adoption of social networks for teaching and learning at high schools.
45
Song, Han Hee 1978. "Large-scale network analytics." 2011. http://hdl.handle.net/2152/18175.
Full textAbstract:
Scalable and accurate analysis of networks is essential to a wide variety of existing and emerging network systems. Specifically, network measurement and analysis helps to understand networks, improve existing services, and enable new data-mining applications. To support various services and applications in large-scale networks, network analytics must address the following challenges: (i) how to conduct scalable analysis in networks with a large number of nodes and links, (ii) how to flexibly accommodate various objectives from different administrative tasks, (iii) and how to cope with the dynamic changes in the networks. This dissertation presents novel path analysis schemes that effectively address the above challenges in analyzing pair-wise relationships among networked entities. In doing so, we make the following three major contributions to large-scale IP networks, social networks, and application service networks. For IP networks, we propose an accurate and flexible framework for path property monitoring. Analyzing the performance side of paths between pairs of nodes, our framework incorporates approaches that perform exact reconstruction of path properties as well as approximate reconstruction. Our framework is highly scalable to design measurement experiments that span thousands of routers and end hosts. It is also flexible to accommodate a variety of design requirements. For social networks, we present scalable and accurate graph embedding schemes. Aimed at analyzing the pair-wise relationships of social network users, we present three dimensionality reduction schemes leveraging matrix factorization, count-min sketch, and graph clustering paired with spectral graph embedding. As concrete applications showing the practical value of our schemes, we apply them to the important social analysis tasks of proximity estimation, missing link inference, and link prediction. The results clearly demonstrate the accuracy, scalability, and flexibility of our schemes for analyzing social networks with millions of nodes and tens of millions of links. For application service networks, we provide a proactive service quality assessment scheme. Analyzing the relationship between the satisfaction level of subscribers of an IPTV service and network performance indicators, our proposed scheme proactively (i.e., detect issues before IPTV subscribers complain) assesses user-perceived service quality using performance metrics collected from the network. From our evaluation using network data collected from a commercial IPTV service provider, we show that our scheme is able to predict 60% of the service problems that are complained by customers with only 0.1% of false positives.<br>text
46
Kalash, Abeer. "Trust modelling through social sciences." Thesis, 2014. http://hdl.handle.net/1805/6454.
Full textAbstract:
Indiana University-Purdue University Indianapolis (IUPUI)<br>In today's fast paced world, people have become increasingly interested in online communication to facilitate their lives and make it faster. This goes on from simple social interactions to more advanced actions like shopping on the internet. The presence of such activities makes it crucial for people to use their common sense and judgment to process all this information and evaluate what/who they trust and what/whom they do not. This process would have been much easier if the number of people in such networks is really small and manageable. However, there are millions of users who are hooked online every day. This makes the person very overwhelmed with his trusting decision, especially when it comes to interacting with strangers over the internet, and/or buying personal items, especially expensive ones. Therefore, many trust models have been proposed by computer scientists trying to evaluate and manage the trust between users using different techniques and combining many factors. What these computer scientists basically do is coming up with mathematical formulas and models to express trust in online networks and capture its parameters. However, social scientists are the people better trained to deal with concepts related to human behaviors and their cognitive thinking such as trust. Thus, in order for computer scientists to support their ideas and get a better insight about how to direct their research, people like social scientists should contribute. With this in mind, we realized in our group work the importance of such contribution, so we came up with the idea of my research work. In my search, I tried to find how these social scientists think and tackle a dynamic notion like trust, so we can use their findings in order to enhance our work and trust model. Through the chapters, I will discuss an already developed trust model that uses measurement theory in modeling trust. I will refer back to this model and see how other social scientists dealt with some of the issues encountered by the model and its functionality. Some small experiments have been done to show and compare our results with social scientists results for the same matter. One of the most important and controversial points to be discussed from social scientists' point of view is whether trust is transitive or not. Other points to be discussed and supported by social scientists' research include aggregation, reputation, timing effects on trust, reciprocity, and experience effects on trust. Some of these points are classified into trust mapping categories and others are related to trust management or decision making stages. In sum, this work is a multidisciplinary study of trust whose overall goal is to enhance our work and results, as computer scientists.
47
KIES, Raphaël. "Promises and limits of web-deliberation." Doctoral thesis, 2008. http://hdl.handle.net/1814/10477.
Full textAbstract:
Defence date: 09 June 2008<br>Examining Board:
Prof. Peter Wagner, University of Trento and EUI Supervisor
Prof. Alexander Trechsel, EUI
Prof. Jürg Steiner, University of Carolina
Prof. Hanspeter Kriesi, University of Zürich<br>PDF of thesis uploaded from the Library digital archive of EUI PhD theses<br>In this work we will attempt to evaluate which of these scenarios is most likely to become prominent in the future by focusing essentially on three issues: 1) the usage of the online forum by observing how diffuse the phenomenon is and who the users of the online debates are; 2) The offer of the online political forum, by analyzing which are the political actors (civil society, media, institutional actors) who are more susceptible to host the online political debates; and 3) the quality of the online debates by assessing their deliberativeness. By elaborating a sophisticated method for measuring the deliberativeness of the online debates and by analyzing a great variety of online debates our objective is to provide an appreciation of the deliberative potential of the web-debates that avoids shortcuts and inappropriate generalizations, but that recognizes that this may be determined by a multiplicity of factors. From a theoretical perspective the results obtained through our investigations contribute to evaluate whether the deliberative model of democracy could be fostered by the virtualization of the political debates and, more generally, it should also contribute to the elaboration of a deliberative model of democracy that is grounded not only on theoretical principles and suppositions, as this tends to be the case, but also on empirical studies that test its adaptability to the 'real life politics'.
48
Medjo, Danielle. "Social media, knowledge management adoption and information and communication technology project success in the South African context." Thesis, 2016. http://hdl.handle.net/10539/20498.
Full textAbstract:
Thesis (M.Com. (Development Theory and Policy))--University of the Witwatersrand, Faculty of Commerce, Law and Management, School of Economic and Business Sciences, 2016.<br>Many ICT projects continue to fail despite the use of established projects methods and techniques as the proper communication systems required for successful project outcomes have been lacking. It is generally believed that the adoption and diffusion of information and communication technologies (ICTs) makes a contribution to a nation‟s economic and sustainable development. The explosion of social media is changing the way we communicate and therefore the processes involving project management information systems. Research shows that as technology usage lags, so does per capita income, skills development and productivity. Despite much global literature that relates to the failure of ICT projects, what is absent from the literature is knowledge of the relative contribution of different factors to ICT project success in the South African context. This study sought to address this absence. From a review of the literature on social media tools and knowledge sharing and reuse, four propositions relating the use of social media and adoption of certain knowledge management practices to the success of ICT projects were generated about the likely impact of these variables on ICT project performance. The research study was conducted over twenty-month effort. Both qualitative and quantitative data were obtained. The qualitative study based on a grounded theory analysis of ICT professionals, derived propositions that were tested empirically. Bivariate correlation analysis, multiple linear regressions and multiple hierarchical regression analyses were applied. Results indicated that knowledge management adoption mediates the relationship between social media usage and ICT project cost performance. Additionally project type was found to play a moderating role in the relationship between knowledge management and project performance. Implications for practice and theory are discussed.
49
Park, Seong Cheol. "Indianapolis emergency medical service and the Indiana Network for Patient Care : evaluating the patient match process." Thesis, 2014. http://hdl.handle.net/1805/3808.
Full textAbstract:
Indiana University-Purdue University Indianapolis (IUPUI)<br>In 2009, Indianapolis Emergency Medical Service (I-EMS, formerly Wishard Ambulance Service) launched an electronic medical record system within their ambulances and started to exchange patient data with the Indiana Network for Patient Care (INPC). This unique system
allows EMS personnel in an ambulance to get important medical information prior to the patient’s arrival to the accepting hospital from incident scene. In this retrospective cohort study, we found EMS personnel made 3,021 patient data requests (14%) of 21,215 EMS transports
during a one-year period, with a “success” match rate of 46%, and a match “failure” rate of 17%. The three major factors for causing match “failure” were (1) ZIP code 55%, (2) Patient Name 22%, and (3) Birth Date 12%. This study shows that the ZIP code is not a robust identifier in the patient identification process and Non-ZIP code identifiers may be a better choice due to inaccuracies and changes of the ZIP code in a patient’s record.
50
Mathai, Maneesh. "Context based content aggregation for Social Life Networks." Thesis, 2013. http://hdl.handle.net/1959.7/uws:21020.
Full textAbstract:
Better decisions can be made in the profession of the users if they can filter out the relevant information from all the available information sources. The mass availability of the mobile devices has enabled the users to quickly access timely information from any location. The aim of this work is to identify a suitable way to provide timely information in context by capturing contextual information through the mobile device, to support the activities of the user. The context model tries to identify the context of the user by identifying the task being performed by the user. The system is aware of the information need and the information source for each task of the user and the relevant information is filtered out of the information source, by using the users context. The context model was designed and tested for the farming domain, to support the livelihood activities of the farmer, by extending the concepts of Social Life Networks. Social Life Networks aggregates information from various sensors on a mobile phone, other published data sources and micro blogs such as Twitter to detect evolving situations and make that information available to the users in real time. This initial prototype was evaluated with a sample of farmers to check usefulness of provided information and usability of the application in order to support their day to day decision making process. The sample group strongly endorsed the various aspects of the proto-type application and provided valuable insights for improvement. The current application is a specific instance of the SLN project and we plan to create more application for SLN to test and refine the context models.