O imediatismo relacionado a troca de informações é uma realidade enfrentada pela população dos tempos modernos e o uso de sistemas de mensagens instantâneas móveis (MIM) é indispensável para que a comunicação aconteça da forma esperada. Atualmente a maioria da população mundial utiliza de sistemas MIM como meio de comunicação rápida e muitas vezes gratuita, com a finalidade de auxiliar a comunicação no ambiente de trabalho, troca de informações gerais e também como um meio de entretenimento. Devido a sua importância e eficácia é que diversas pesquisas buscam entender os fatores que determinam a adoção e o uso desses sistemas. Esta pesquisa tem como objetivo avaliar por meio da percepção de estudantes do ensino superior, os fatores que afetam o uso dos serviços de mensagens instantâneas móveis. Para alcançar este objetivo, foi realizada uma pesquisa survey com 1.386 estudantes de quatro instituições de ensino superior. Após a coleta foi realizada a modelagem das equações estruturais com o uso do software SmartPLS 2.0 para o cálculo dos mínimos quadrados parciais (Partial Least Squares - PLS), além do uso do Statistical Package for Social Sciences (SPSS) para a análise descritiva dos dados. Esta pesquisa obteve como resultado que o construto Qualidade do serviço influencia positivamente na Confirmação, bem como a Confirmação tem relação positiva com a Utilidade percebida, Prazer percebido, Interface do usuário e Segurança percebida. Prazer percebido e Interface do usuário tem relação positiva com a Satisfação e as relações entre Satisfação, Utilidade percebida e Prazer percebido influenciam positivamente na Intenção de continuidade de uso do sistema WhatsApp. Identificou-se que, no contexto desta pesquisa, o prazer e a satisfação atuam como fatores que influenciam diretamente na intenção de continuidade de uso do sistema WhatsApp, seguidos pela Utilidade, o que faz o uso deste sistema ser mais intuitivo do que prático. / Immediacy related to the exchange of information is a reality faced by the population of modern times and the use of mobile instant messaging (MIM) is indispensable for the communication to happen as expected. Today the majority of the world's population uses MIM systems as a fast and often free medium for the purpose of helping communication in the workplace, exchange of general information and also as a means of entertainment. Due to its importance and effectiveness, several studies seek to understand the factors that determine the adoption and use of these systems. This research aims to evaluate, through the perception of students of higher education, the factors that affect the use of mobile instant messaging services. To achieve this goal, a survey was conducted with 1,386 students from four higher education institutions. After the collection, the modeling of the structural equations was performed using the SmartPLS 2.0 software for the calculation of the partial least squares (PLS), besides the use of the Statistical Package for Social Sciences (SPSS) for the descriptive analysis of the data. This research has as a result that the Quality of Service construct positively influences Confirmation, as well as Confirmation has positive relation with Perceived Utility, Perceived Pleasure, User Interface and Perceived Security. Perceived pleasure and user interface has a positive relationship with satisfaction and the relationship between satisfaction, perceived utility and perceived enjoyment positively influences the intention to use the WhatsApp system. It was identified that, in the context of this research, pleasure and satisfaction act as factors that directly influence the intention to use WhatsApp system, followed by Utility, which makes the use of this system more intuitive than practical.

Idag finns det en uppsjö av meddelandeapplikationer och det kommer nya nästan varje dag. Dock finns det inte lika många meddelandeapplikationer där både klientapplikationen och serverapplikationen är öppen källkod och kan köras på egna privata servrar. Dessa meddelandeapplikationer är bra på att lösa problemet att många, upp till flera miljoner personer ska kunna kommunicera med varandra. Dock finns det ett mindre användarfall med ett mindre meddelandesystem som består av enbart ett meddelandeflöde, där alla meddelanden är synliga för alla enheter. Detta mindre användarfall gör att mindre metadata behövs. Användningsområden för ett sådant meddelandesystem kan vara bl.a. att få notifikationer från servrar eller att skriva anteckningar. Meddelandeflödet synkroniseras mellan alla enheter. Målet med detta arbete är att skapa ett End-to-End krypterat meddelandesystem som uppfyller autentisering, dataintegritet och sekretess. Forskning har granskats gällande svagheter i vissa krypteringstekniker, dessa svagheter har tagits i åtanke vid skapandet av meddelandesystemet. Syftet varför detta meddelandesystem behöver skapas är därför att något befintligt system som uppfyller vissa viktiga krav för att upprätthålla den personliga integriteten saknas. En prototyp har skapats som består av en serverapplikation och en grafisk datorapplikation. Meddelanden som skickas i meddelandesystemet är End-to-End krypterade. Kommunikation mellan klienter och server är även den krypterad och autentiserad. / Today there exists many messaging applications and new ones are released almost daily. However, there are not as many messaging applications where both the client application and the server application are open source and can be self hosted. These messaging applications are good at solving the problem that many, up to several million people can communicate with each other. However, there is a smaller more focused use case with a messaging system consisting of only one message flow, where all messages are visible to all devices. This smaller use case means that less metadata is required. Uses for such a messaging system may be to receive notifications from servers or to take personal notes. The message system is synchronized between all devices. The goal of this project is to create an End-to-End encrypted messaging system that provides authentication, data integrity and confidentiality. Research has been investigated regarding weaknesses in some encryption techniques, these weaknesses have been taken into account when creating the messaging system. The purpose why this messaging system needs to be created is because an existing system that meets certain essential requirements for maintaining maximum personal integrity is missing. A prototype has been created that consists of a server application and a graphical computer application. Messages sent in the messaging system are End-to-End encrypted. Communication between clients and the server is also encrypted and authenticated.

Submitted by Timbo Noeme (noeme.timbo@metodista.br) on 2016-08-09T17:10:01Z No. of bitstreams: 1 LeonardoMMuniz2.pdf: 1320890 bytes, checksum: e1d55ac3650fd4a9ee03b53c73b61a12 (MD5) / Made available in DSpace on 2016-08-09T17:10:01Z (GMT). No. of bitstreams: 1 LeonardoMMuniz2.pdf: 1320890 bytes, checksum: e1d55ac3650fd4a9ee03b53c73b61a12 (MD5) Previous issue date: 2015-12-15 / The internet is part of every people daily life and becomes increasingly accessible through different types of devices. Several studies have been conducted in order to assess the consequences of their excessive use in personal, academic and professional life. This paper aimed to identify if the concentration and social isolation are some of the reflections by the excessive use of instant messaging applications in the workplace. Some of the variables that assess aspects of excessive use of instant messaging are diminished impulse control, loneliness, social comfort, and digital distraction. Through a quantitative research approach, it was used scales applied to a sample of 283 people, the data was analyzed by multivariate techniques like Exploratory Factor Analysis and Multiple Linear Regression. The results of this study confirm that the excessive use of instant messaging is positive related to loss of concentration and the variable digital distraction exerts a greater influence than the diminished impulse control. However, according to the results, loneliness and social comfort cannot be said that there is a relationship in increasing social isolation due to lack of significance of the relationship. / A Internet está inserida no cotidiano do indivíduo, e torna-se cada vez mais acessível por meio de diferentes tipos de dispositivos. Com isto, diversos estudos foram realizados com o intuito de avaliar os reflexos do seu uso excessivo na vida pessoal, acadêmica e profissional. Esta dissertação buscou identificar se a perda de concentração e o isolamento social são alguns dos reflexos individuais que o uso pessoal e excessivo de aplicativos de comunicação instantânea podem resultar no ambiente de trabalho. Entre as variáveis selecionadas para avaliar os aspectos do uso excessivo de comunicadores instantâneos tem-se a distração digital, o controle reduzido de impulso, o conforto social e a solidão. Através de uma abordagem de investigação quantitativa, utilizaram-se escalas aplicadas a uma amostra de 283 pessoas. Os dados foram analisados por meio de técnicas estatísticas multivariadas como a Análise Fatorial Exploratória e para auferir a relação entre as variáveis, a Regressão Linear Múltipla. Os resultados deste estudo confirmam que o uso excessivo de comunicadores instantâneos está positivamente relacionado com a perda de concentração, e a variável distração digital exerce uma influência maior do que o controle reduzido de impulso. De acordo com os resultados, não se podem afirmar que a solidão e o conforto social exercem relações com aumento do isolamento social, devido à ausência do relacionamento entre os construtos.

Masters of Science / Using presentations in an m-Learning environment enables delivery of rich content to a mobile phone learner. This study investigated how to prepare and stream presentations from a desktop computer to a mobile phone in near-realtime. It also addressed communication between users using interactive text chat in the same environment. Our analysis of text/podcast-based m-Learning applications revealed limited interactivity and lack of diversity in content streamed. To address this, we developed a mobile-based application that uses a task-timer model to synchronize with a server every n units of time to enable near-real time streaming of presentation slides between mobile and desktop users. The application included text-based instant messenger. Laboratory experiments investigated the use Open Office and PowerPoint presentations and techniques used to convert these presentations into mobile phone compatible formats. Experiments were carried out with smart mobile phones running on a third generation cellular network. We employed transaction-logging techniques in addition to automated image analysis techniques to observe and record data. Analysis of the results revealed using presentations enabled more rich content than text-based models such as short message service-based frameworks and podcasts. Although m-Learning is not yet widely adopted, applications such as the one developed in the study offer high hopes for m-Learning because of the use of rich content and interactivity between users. / South Africa

Made available in DSpace on 2015-07-22T20:50:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-05-25 / Objetivo: Avaliar se o envio automático de mensagens de celular do tipo SMS aumenta a adesão ao tratamento com drogas antiretrovirais. Métodos: O sistema web HIVAS foi projetado segundo os preceitos do modelo cascata de engenharia de software. Foram conduzidos dois experimentos: Experimento 1, um ensaio clínico controlado e aleatorizado com mulheres que vivem com HIV/AIDS para avaliar o efeito das SMS na adesão ao tratamento antiretroviral; Experimento 2, um estudo transversal com os dados extraídos de dois prontuários eletrônicos de 4 clínicas médicas paulistanas para avaliar o efeito das SMS na ausência a consultas agendadas. No Experimento 1 a adesão do grupo de participantes alocados para receber SMS, denominado intervenção (n=8), e do grupo de participantes alocados para não receber SMS, denominado controle (n=13) foi medida durante 4 meses pelos métodos de auto-relato de adesão, contagem de pílulas e monitoramento micro-eletrônico (MEMS). No Experimento 2 foram comparadas a incidência de ausência a consultas quando houve envio de lembrete SMS, denominado intervenção (n=7.890), com a incidência de ausências a consultas quando não houve envio de lembrete, denominado controle (n=21.124). Resultados: O sistema web HIVAS foi desenvolvido em 7 meses, entre 2008 e 2009, de acordo com o planejado. No Experimento 1, considerando o período completo de quatro meses, a quantidade e o percentual de participantes dos grupos controle e intervenção que conseguiram manter adesão ao tratamento antiretroviral superior a 95%, foram respectivamente: 11 (84,62%) e 8 (100,00%) para o método de adesão auto-relatada; 5 (38,46%) e 4 (50,00%) para o método da contagem de pílulas; e 6 (46,15%) e 6 (75,00%) para o monitoramento micro-eletrônico. No Experimento 2, em média o percentual de ausência a consultas agendadas que não tiveram envio prévio de SMS foi de 25,57%, enquanto que o percentual de ausência a consultas que tiveram envio de lembrete SMS foi de 19,42%. Conclusão: As mensagens SMS demonstraram potencial em colaborar na adesão do paciente ao tratamento. As mulheres brasileiras que vivem com HIV/AIDS que receberam as SMS relataram que as mensagens são lembretes, incentivos, um olhar preocupado, um carinho de uma clínica de saúde para com elas, uma população ainda marginalizada. Além disso, foi observada uma redução estatisticamente significante na ausência a consultas devido às mensagens SMS. O desenvolvimento do HIVAS foi a etapa conduzida com menor dificuldade no projeto, reforçando a viabilidade da incorporação de SMS para auxiliar na prática clínica. Palavras-chave: Adesão, cooperação do paciente, falta a consultas, HIV, síndrome da imunodeficiência adquirida, telefone celular, mensagem de texto, SMS. / Objective: To assess if SMS automatic sending increases the adherence antiretroviral drug-based treatment regimens. Methods: The web system HIVAS was projected according to software engineering cascade model. It was conducted two experiments: Experiment 1, a randomized controlled trial with woman living with HIV/AIDS to assess the effects of SMS on adherence to antiretroviral therapy; Experiment 2, a transversal study with data extracted from two electronic health recorders of 4 outpatient clinics to assess the effects of SMS on non-attendance rates. On Experiment 1 adherence of participants allocated to receive SMS, called intervention (n=8), and to not receive SMS, labeled control (n=13), was measured during 4 months by self-reported adherence, pill counting, and microelectronic monitoring (MEMS). On Experiment 2, the incidence of non-attendance when a SMS reminder was sent to the appointment, labeled intervention (n=7,890), was compared to the incidence of non-attendance when no SMS reminder was sent, labeled control (n=21,124). Results: The HIV Alert System (HIVAS) was developed over 7 months during 2008 and 2009. On Experiment 1, during the 4-month study period, the number and percentage of participants from both control and intervention groups that achieved adherence levels to antiretroviral therapy exceeding 95%, were respectively: 11 (84.62%) and 8 (100.00%) to self-reported adherence method; 5 (38.46%) and 4 (50.00%) to pill counting method; and 6 (46.15%) and 6 (75.00%) to micro-electronic monitoring. On Experiment 2, the average non-attendance rate to appointments without previous SMS was 25.57%, while average non-attendance rate to appointments with previous SMS was 19.42%. Conclusion: SMS messaging has demonstrated potential in helping patient adherence to therapy. Brazilian women living with HIV/AIDS who received SMS stated that the messages were reminders, incentives and signs of affection by the health clinic for their, a marginalized population. Beside this, it was observed a statistically significant reduction on the incidence of non-attendance due to SMS messages. The development of HIVAS was the less difficulty phase in the project, emphasizing the feasibility of SMS incorporation to help clinical practice. / TEDE / BV UNIFESP: Teses e dissertações

Despite being explored and constantly improved through the years, onboarding of new hires in corporate organizations has remained a challenge. Many of the issues can be linked to a lack of communication between the organization and the new employee, as well as the common nature of these environments where information is spread across job titles and sources. This thesis discusses the feasibility of implementing a basic chatbot that will allow new hires to ask questions and request varied information at all times, using an interface such as a messaging app. This research explores the way chatbots should be designed in order to be effective, reliable and enjoyable from a user experience perspective. The chatbot was developed using the Chatfuel platform and tested by new employees at a corporate environment. The users were requested to explore the chatbot freely and then asked to answer a survey. The interactions were also recorded and analyzed from in both qualitative and quantitative ways (chat logs and analytics). The study proves that an onboarding chatbot is a useful tool for new hires and can be used as a communication facilitator between the organization and the new hires during the first weeks of employment, and also after that, serving as an information source and a broadcasting method. The chatbot gives the new hires an accessible source of information that helps on the process of getting to speed, and enables a positive experience that increases familiarity in the new workplace.

Jag undersöker chattmeddelandet i forumet Facebook Messenger för att se om jag kan finna mönster i de språkliga egenskaper som återfinns. Jag undersöker om egenskaperna innehar mest talspråkliga eller mest skriftspråkliga egenskaper, alternativt om egenskaperna kan anses vara unika för internetchatt. Syftet är att betrakta om chattspråk kan anses vara en självständig varietet i svenska språket.   Materialet består av chattkonversationer från tio informanter födda på 1990-talet samt sju informanter födda på 1960-talet. Genom att söka språkliga mönster hos två olika åldersgrupper går det att belysa huruvida konventionella språkegenskaper i chatt kan vara en generationsfråga. Jag använder en kvantitativ innehållsanalys för att analysera mitt material då jag har valt att kvantifiera de chattspråksegenskaper som jag har funnit. Jag har kvalitativa inslag i min analys för att ha möjlighet att tolka mitt resultat.   Det går att finna mönster i informanternas chattspråk. Det är vanligt att informanter brukar två utropstecken på rad, ”!!”, när de vill betona något i sitt meddelande. Det är också vanligt att utelämna information från chattmeddelanden: framförallt subjektspronomen eller prepositioner.   Det finns skillnader åldersgrupperna emellan. De yngre informanterna brukar många emoticoner medan de äldre gör det vid enstaka tillfällen. De yngre informanterna brukar emoticoner som satsavdelare – i stället för punkt och kommatecken – medan de äldre skriver enligt mer formella skriftspråksnormer. De äldre informanterna skriver ofta inledningar och avslutningar på sina meddelanden vilket de yngre inte gör.   Chattspråk, eller internetspråk, kan sägas vara en självständig språkvarietet även om de flesta språkliga egenskaperna inte är genuint nya. Verksamheten för kommunikation styr språket. Syftet med var och varför människor skriver till varandra har förändrats på grund av internet, vilket påverkar språket.

Enterprise Systems like customer-billing systems or financial transaction systems are required to process large volumes of data in a fixed period of time. Those systems are increasingly required to also provide near-time processing of data to support new service offerings. Common systems for data processing are either optimized for high maximum throughput or low latency. This thesis proposes the concept for an adaptive middleware, which is a new approach for designing systems for bulk data processing. The adaptive middleware is able to adapt its processing type fluently between batch processing and single-event processing. By using message aggregation, message routing and a closed feedback-loop to adjust the data granularity at runtime, the system is able to minimize the end-to-end latency for different load scenarios. The relationship of end-to-end latency and throughput of batch and message-based systems is formally analyzed and a performance evaluation of both processing types has been conducted. Additionally, the impact of message aggregation on throughput and latency is investigated. The proposed middleware concept has been implemented with a research prototype and has been evaluated. The results of the evaluation show that the concept is viable and is able to optimize the end-to-end latency of a system. The design, implementation and operation of an adaptive system for bulk data processing differs from common approaches to implement enterprise systems. A conceptual framework has been development to guide the development process of how to build an adaptive software for bulk data processing. It defines the needed roles and their skills, the necessary tasks and their relationship, artifacts that are created and required by different tasks, the tools that are needed to process the tasks and the processes, which describe the order of tasks.

In this thesis, I use a multi-perspectival analytical approach to investigate the paralanguage of naturally occurring work-based Instant Message conversations. My research into the field of computer-mediated discourse analysis (CMDA) has shown that written non-verbal cues have been considered as important means of contextualising text-based computer-mediated communication (CMC), yet their scholarly treatment has been scant. Previous findings about the importance paralanguage in CMD have been further strengthened by the findings of the field of business communication: in the virtual work environment the lack of audio-visual information has been found to contribute to miscommunication and consequently hinder cooperation. The linguistic devices and discursive strategies that are used in order to compensate for the limitations imposed by the text-based communicative channel have therefore been identified as in need of further exploration. In this thesis, I have outlined a CMC cue system based on the previous findings of CMDA to investigate the range of cues used as non-verbal signals in workplace text- based CMC. I have also used a multi-perspectival approach based on the theoretical frameworks of interactional sociolinguistics, communities of practice, relational work and politeness and conversation analysis (CA) in order to investigate the range of interactional roles of paralanguage during computer-mediated business conversations. The interpretive CA-informed analysis I have conducted has provided evidence of the important role of non-verbal signals during the contextualisation of complex transactional and relational communicative goals in the workplace. The analysis in this thesis has provided two significant results: firstly, by incorporating the findings of research into paralanguage of spoken as well as other written genres it resulted in a comprehensive description of the orthographic and typographic non-verbal cues used in text-based CMC and, secondly, by drawing on the multi-perspectival framework, it allowed for a description of the complex interactional functions of these cues during the contextualisation of content and relational intent and the creation of interactional coherence in IM.

Magister Scientiae - MSc / In South Africa, Deaf people communicate with one another and the broader community by means of South African Sign Language. The majority of Deaf people who have access to a mobile phone (cell phone) use Short Message Service (SMS) to communicate and share information with hearing people, but seldom use it among themselves. It is assumed that video messaging will be more accessible to Deaf people, since their level of literacy may prevent them from making effective use of information that is disseminated via texting/SMS. The principal objective of the esearch was to explore a cost-effective and efficient mass multimedia messaging system. The intention was to adapt a successful text-based mass notification system, developed by a local nongovernmental organization (NGO), to accommodate efficient and affordable video mass messaging for Deaf people. The questions that underpin this research are: How should video- streaming mass-messaging methods be compared and evaluated to find the most suitable method to deliver an affordable and acceptable service to Deaf people? What transport vehicles should be considered: Multimedia Message Service (MMS), the web, electronic mail, or a cell phone resident push/pullapplication? Which is the most cost effective? And, finally: How does the video quality of the various transport vehicles differ in terms of the clarity of the sign language as perceived by the Deaf? The soft-systems methodology and a mixed-methods methodology were used to address the research questions. The soft-systems methodology was followed to manage the research process and the mixed-methods research methodology was followed to collect data. Data was collected by means of experiments and semi-structured interviews. A prototype for mobile phone usage was developed and evaluated with Deaf members the NGO Deaf Community of Cape Town. The technology and internet usage of the Deaf participants provided background information. The Statistical Package for Social Science (SPSS) was used to analyse the quantitative data, and content analysis was used to analyse the documents and interviews. All of the Deaf participants used their mobile phones for SMS and the majority (81.25%) used English to type messages; however, all indicated that they would have preferred to use South Africa sign language on their mobile phones if it were available. And they were quite willing to pay between 75c and 80c per message for using such a video-messaging service.Of the transport vehicles demonstrated, most Deaf people indic indicated that they preferred to use the SMS prototype (with a web link to the video) rather than the MMS prototype with the video attached. They were, however, very concerned about the cost of using the system, as well as the quality of the sign language videos. / South Africa