<p>Många författare har skrivit hur viktigt det är att ha med användarna i systemutvecklingsprocessen. För att användarna ska kunna vara med, krävs det att de först identifieras. En grupp av användare som är väldigt viktiga att ha med för hur bra funktionaliteten på systemet kommer att bli är slutanvändarna. Det är denna grupp som måste identifieras. Syftet med detta arbete är att undersöka vilka riktlinjer som finns för att identifiera slutanvändarna i början av utvecklingsprocessen, samt vilka fördelar och nackdelar det finns med att använda riktlinjerna. Denna undersökning har genomförts mestadels med intervjuer och litteraturstudie.</p><p>Resultatet som erhållits, visar att identifiering av slutanvändarna i början på utvecklingsprocessen görs genom att använda tre generella riktlinjer. Dessa riktlinjer är intervjuer, brainstorming och observationer. Fördelen med dessa är att de flesta kan bli hörda och nackdelen med dessa är att de tar ganska lång tid att genomföra.</p>

This thesis is a study of a new specification for end user interactivity developed by the Open Mobile Alliance, the specification is called OMA BCAST Service Interaction Function. The specification is one part of the OMA BCAST Service Enabler, which enables service delivery to mobile devices, where the most common service is mobile television. The Service Interaction Function enables end user interactivity related to a service, this could be a poll about the current television program or a chat where every message is presented to the users that are watching the same channel. The specification is still of draft version and the scope of this thesis has been to investigate the Service Interaction Function and implement a PC prototype.

One approach to manage collections is to create data about the things in it. This descriptive data is called metadata, and this term is in this thesis used as a collective noun, i.e no plural form exists. A library is a typical example of an organization that uses metadata, to manage a collection of books. The metadata about a book describes certain attributes of it, for example who the author is. Metadata also provides possibilities for a person to judge if a book is interesting without having to deal with the book itself. The metadata of the things in a collection is a representation of the collection that is easier to deal with than the collection itself. Nowadays metadata is often managed in computer-based systems that enable search possibilities and sorting of search results according to different principles. Metadata can be created both by computers and humans. This thesis will deal with certain aspects of the human activity of creating metadata and includes an explorative study of this activity. The increased amount of public information that is produced is also required to be easily accessible and therefore the situation when metadata is a part of the Semantic Web has been considered an important part of this thesis. This situation is also referred to as the Web of Data or Linked Data. With the Web of Data, metadata records living in isolation from each other can now be linked together over the web. This will probably change what kind of metadata that is being created, but also how it is being created. This thesis describes the construction and use of a framework called Annotation Profiles, a set of artifacts developed to enable an adaptable metadata creation environment with respect to what metadata that can be created. The main artifact is the Annotation Profile Model (APM), a model that holds enough information for a software application to generate a customized metadata editor from it. An instance of this model is called an annotation profile, that can be seen as a configuration for metadata editors. Changes to what metadata can be edited in a metadata editor can be done without modifying the code of the application. Two code libraries that implement the APM have been developed and have been evaluated both internally within the research group where they were developed, but also externally via interviews with software developers that have used one of the code-libraries. Another artifact presented is a protocol for how RDF metadata can be remotely updated when metadata is edited through a metadata editor. It is also described how the APM opens up possibilities for end user development and this is one of the avenues of pursuit in future research related to the APM. / <p>QC 20141028</p>

Incorporating a psychological contract perspective into information technology projects, this study intends to explore the elements of the software publisher-reseller-end user psychological contract in the context of IT projects and contribute to existing literature in the field of IT psychological contracts. The data for this study was collected via 10 interviews conducted across 5 different cases. Interviewees were asked to describe IT projects they were recently involved in and outline what they perceived to be their obligations towards the other stakeholders and likewise, the obligations of the other stakeholders upon them. Interviews were transcribed and coded in accordance with existing IT project psychological contract elements derived from literature. The results of this study provided support to all psychological contract elements of the existing model and suggest refinements to better capture the perceived obligations of stakeholders in IT Projects. Furthermore, we observe that while the resellers’ and software publishers’ psychological contracts with end users conformed to the obligations expected under the model of supplier-customer relationships, the software reseller-software publisher psychological contracts reciprocally contained elements of both supplier and customer obligations. Finally, the findings of this study revealed that critical to the success of IT projects are the elements of transparency, accuracy, dedication, knowledge and responsibility.

Despite the persistent change and growth that characterizes the Internet, the Transmission Control Protocol (TCP) still dominates at the transport layer, carrying more than 90\% of the global traffic. Despite its astonishing success, it has been observed that TCP can cause poor end-to-end performance, especially for large transfers and in network paths with high bandwidth-delay product. In this thesis, we focus on mechanisms that can address key problems in TCP performance, without any modification in the protocol itself. This evolutionary approach is important in practice, as the deployment of clean-slate transport protocols in the Internet has been proved to be extremely difficult. Specifically, we identify a number of TCP-related problems that can cause poor end-to-end performance. These problems include poorly dimensioned socket buffer sizes at the end-hosts, suboptimal buffer sizing at routers and switches, and congestion unresponsive TCP traffic aggregates. We propose solutions that can address these issues, without any modification to TCP. <br> <br> In network paths with significant available bandwidth, increasing the TCP window till observing loss can result in much lower throughput than the path's available bandwidth. We show that changes in TCP are {em not required} to utilize all the available bandwidth, and propose the application-layer SOcket Buffer Auto-Sizing (SOBAS) mechanism to achieve this goal. SOBAS relies on run-time estimation of the round trip time (RTT) and receive rate, and limits its socket buffer size when the receive rate approaches the path's available bandwidth. In a congested network, SOBAS does not limit its socket buffer size. Our experiment results show that SOBAS improves TCP throughput in uncongested network without hurting TCP performance in congested networks. <br> <br> Improper router buffer sizing can also result in poor TCP throughput. Previous research in router buffer sizing focused on network performance metrics such as link utilization or loss rate. Instead, we focus on the impact of buffer sizing on end-to-end TCP performance. We find that the router buffer size that optimizes TCP throughput is largely determined by the link's output to input capacity ratio. If that ratio is larger than one, the loss rate drops exponentially with the buffer size and the optimal buffer size is close to zero. Otherwise, if the output to input capacity ratio is lower than one, the loss rate follows a power-law reduction with the buffer size and significant buffering is needed. The amount of buffering required in this case depends on whether most flows end in the slow-start phase or in the congestion avoidance phase. <br> <br> TCP throughput also depends on whether the cross-traffic reduces its send rate upon congestion. We define this cross-traffic property as {em congestion responsiveness}. Since the majority of Internet traffic uses TCP, which reduces its send rate upon congestion, an aggregate of many TCP flows is believed to be congestion responsive. Here, we show that the congestion responsiveness of aggregate traffic also depends on the flow arrival process. If the flow arrival process follows an open-loop model, then even if the traffic consists exclusively of TCP transfers, the aggregate traffic can still be unresponsive to congestion. TCP flows that arrive in the network in a closed-loop manner are always congestion responsive, on the other hand. We also propose a scheme to estimate the fraction of traffic that follows the closed-loop model in a given link, and give practical guidelines to increase that fraction with simple application-layer modifications.

It is widely recognised that meaning and interpretation are fundamental aspects of user-system interaction in the retrieval of specialised information. Important constituents of information retrieval system are thesauri. To identify what understandings of thesauri exist, is crucial to improve instruction of database users and for an assessment of the functioning of thesauri in specialised information. Thesauri as phenomena can be viewed from a techno scientific perspective and a lifeworld perspective. The lifeworld perspective is made up of the collective understanding of those who use them. Lifeworld aspects of thesauri, i.e., how they are understood by social science researchers, have been disclosed by applying phenomenographic research against the background of the hermeneutical constitution of the online dialogue. The phenomenographic interpretative model has been used since its knowledge interest focuses on how techno scientific concepts are conceived of in the lifeworld. This has rendered descriptions of conceptions of thesauri in the form of two main categories: 1) the thesaurus as being separable from the database with the subcategories a) the thesaurus as a control device, and b) as incomplete terminology; 2) the thesaurus as being inseparable from the database with the subcategories of a) descriptors as evaluation criteria, and b) as search enhancers. Based on the configuration of the online dialogue, searching without understanding the thesaurus has also been described in the form of a third, 'empty' category and contrasted with the conceptions of thesauri. The findings represent a contribution to the hermeneutics of the online dialogue, and the results are immediately applicable for the development of discourses in the instruction of end-users and future information professionals. They also provide an empirical argument in support of further conceptual development of thesauri, which strives to make explicit the meaning of descriptors by incorporating terminological and epistemological knowledge, thus integrating domain knowledge into the database search process. The work contained in this thesis has not been previously submitted for a degree or diploma at any other higher education institution. To the best of my knowledge and belief, the thesis contains no material previously published or written by another person except where due reference is made.

Thesis (Ph.D.)--University of Wollongong, 2005. / Typescript. Includes bibliographical references: leaf 257-276.

Thesis (D. Sc.)--Nova University, 1991. / At head of title: Dissertation report IS 8995. Vita. Includes bibliographical references (leaves 96-107).

Thesis (D. Sc.)--Nova University, 1991. / At head of title: Dissertation report IS 8995. Vita. Includes bibliographical references (leaves 96-107).

Electronic medical records (EMR) can be used by Primary Care Physicians (PCP) to support diabetes care in a proactive and planned way. Although the majority of Canadian PCPs have adopted an EMR, advanced use of the EMR is limited. The literature widely suggests that end-user-support (EUS) is a critical success factor for increasing use of advanced EMR features, such as diabetes registries and recalls or reminders. Training is one type of EUS that is intended to help PCPs to better use their EMRs; however, many PCPs receive little or inadequate EMR training, especially following the implementation of an EMR. Specifically, there is a dearth of literature on the use of video tutorials to improve EMR use. The purpose of this mixed methods (QUAN(qual)) study was to evaluate the potential for EMR video tutorials to improve process measures for type 1 and type 2 diabetes care for PCPs using OSCAR EMR in British Columbia. EMR video tutorials were developed based on the Chronic Care Model, value-adding EMR use, evidence-based video tutorial design, clinician-led EMR training, the Structure-Process-Outcome Model, and the New World Kirkpatrick Model. In total, 18 PCPs participated in the study, and 12 of them participated in 21 follow up interviews. The study results demonstrated that the study intervention and Hawthorne effect elicited a statistically significant increase in EMR feature use for diabetes care, with a large effect size (i.e., F(3, 51) = 6.808, p <.001, partial η2 = .286). Multiple barriers and facilitators to applying the tutorial skills into practice were also found at the physician, staff, patient, EMR, and policy levels, such as time, funding, computer literacy of staff, patient responsibility, and user-friendliness of the EMR. Three pairs of PCP characteristics had a strong and positive association, which was statistically significant: (1) age and years of practice; (2) years of experience using OSCAR EMR and number of EMRs used; and (3) computer skills and EMR skills. PCPs' years of medical practice was statistically significant in predicting their baseline use of the EMR for diabetes care. Graphical trends indicated that higher increases in mean composite EMR use (MCEU) score for diabetes care over the duration of the study were associated with PCPs with the following characteristics: (1) being female, (2) being aged 35-44, (3) being from Vancouver Island, (4), having less than four years of medical practice, (5) having 3-4 years of EMR experience, (6) having 1-2 years of OSCAR EMR experience, (7) using four EMRs, and (8) having prior post-implementation EMR training. This small-scale efficacy study demonstrates the potential of CCM-based EMR video tutorials to improve EMR use for chronic diseases such as diabetes. A larger-scale effectiveness study with a control group is needed to further validate the study findings and determine their generalizability. / Graduate