896 resultados para usability


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Products and services explicitly intended to influence users’ behaviour are increasingly being proposed to reduce environmental impact and for other areas of social benefit. Designing such interventions often involves adopting and adapting principles from other contexts where behaviour change has been studied. The ‘design pattern’ form, used in software engineering and HCI, and originally developed in architecture, offers benefits for this transposition process. This article introduces the Design with Intent toolkit, an idea generation method using a design pattern form to help designers address sustainable behaviour problems. The article also reports on exploratory workshops in which participants used the toolkit to generate concepts for redesigning everyday products—kettles, curtains, printers and bathroom sinks/taps—to reduce the environmental impact of use. The concepts are discussed, along with observations of how the toolkit was used by participants, suggesting usability improvements to incorporate in future versions.

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The problem addressed in this thesis is that a considerable proportion of students around the world attend school in inadequate facilities, which is detrimental for the students’ learning outcome. The overall objective in this thesis is to develop a methodology, with a novel approach to involve teachers, to generate a valuable basis for decisions regarding design and improvement of physical school environment, based on the expressed needs for a specific school, municipality, or district as well as evidence from existing research. Three studies have been conducted to fulfil the objective: (1) a systematic literature review and development of a theoretical model for analysing the role of the physical environment in schools; (2) semi structured interviews with teachers to get their conceptions of the physical school environment; (3) a stated preference study with experimental design as an online survey. Wordings from the transcripts from the interview study were used when designing the survey form. The aim of the stated preference study was to examine the usability of the method when applied in this new context of physical school environment. The result is the methodology with a mixed method chain where the first step involves a broad investigation of the specific circumstances and conceptions for the specific school, municipality, or district. The second step is to use the developed theoretical model and results from the literature study to analyse the results from the first step and transform them in to a format that fits the design of a stated preference study. The final step is a refined version of the procedure of the performed stated preference study.

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This work involves the organization and content perspectives on Enterprise Content Management (ECM) framework. The case study at the Federal University of Rio Grande do Norte was based on ECM model to analyse the information management provided by the three main administrative systems: The Integrated Management of Academic Activities (SIGAA), Integrated System of Inheritance, and Contracts Administration (SIPAC) and the Integrated System for Administration and Human Resources (SIGRH). A case study protocol was designed to provide greater reliability to research process. Four propositions were examined in order to reach the specific objectives of identification and evaluation of ECM components from UFRN perspective. The preliminary phase provided the guidelines for the data collection. In total, 75 individuals were interviewed. Interviews with four managers directly involved on systems design were recorded (average duration of 90 minutes). The 70 remaining individuals were approached in random way in UFRN s units, including teachers, administrative-technical employees and students. The results showed the presence of many ECM elements in the management of UFRN administrative information. The technological component with higher presence was "management of web content / collaboration". But initiatives of other components (e.g. email and document management) were found and are in continuous improvement. The assessment made use of eQual 4.0 to examine the effectiveness of applications under three factors: usability, quality of information and offered service. In general, the quality offered by the systems was very good and walk side by side with the obtained benefits of ECM strategy adoption in the context of the whole institution

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Variability management is one of the major challenges in software product line adoption, since it needs to be efficiently managed at various levels of the software product line development process (e.g., requirement analysis, design, implementation, etc.). One of the main challenges within variability management is the handling and effective visualization of large-scale (industry-size) models, which in many projects, can reach the order of thousands, along with the dependency relationships that exist among them. These have raised many concerns regarding the scalability of current variability management tools and techniques and their lack of industrial adoption. To address the scalability issues, this work employed a combination of quantitative and qualitative research methods to identify the reasons behind the limited scalability of existing variability management tools and techniques. In addition to producing a comprehensive catalogue of existing tools, the outcome form this stage helped understand the major limitations of existing tools. Based on the findings, a novel approach was created for managing variability that employed two main principles for supporting scalability. First, the separation-of-concerns principle was employed by creating multiple views of variability models to alleviate information overload. Second, hyperbolic trees were used to visualise models (compared to Euclidian space trees traditionally used). The result was an approach that can represent models encompassing hundreds of variability points and complex relationships. These concepts were demonstrated by implementing them in an existing variability management tool and using it to model a real-life product line with over a thousand variability points. Finally, in order to assess the work, an evaluation framework was designed based on various established usability assessment best practices and standards. The framework was then used with several case studies to benchmark the performance of this work against other existing tools.

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We present a new method for ecologically sustainable land use planning within multiple land use schemes. Our aims were (1) to develop a method that can be used to locate important areas based on their ecological values; (2) to evaluate the quality, quantity, availability, and usability of existing ecological data sets; and (3) to demonstrate the use of the method in Eastern Finland, where there are requirements for the simultaneous development of nature conservation, tourism, and recreation. We compiled all available ecological data sets from the study area, complemented the missing data using habitat suitability modeling, calculated the total ecological score (TES) for each 1 ha grid cell in the study area, and finally, demonstrated the use of TES in assessing the success of nature conservation in covering ecologically valuable areas and locating ecologically sustainable areas for tourism and recreational infrastructure. The method operated quite well at the level required for regional and local scale planning. The quality, quantity, availability, and usability of existing data sets were generally high, and they could be further complemented by modeling. There are still constraints that limit the use of the method in practical land use planning. However, as increasing data become available and open access, and modeling tools improve, the usability and applicability of the method will increase.

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End users urgently request using mobile devices at their workplace. They know these devices from their private life and appreciate functionality and usability, and want to benefit from these advantages at work as well. Limitations and restrictions would not be accepted by them. On the contrary, companies are obliged to employ substantial organizational and technical measures to ensure data security and compliance when allowing to use mobile devices at the workplace. So far, only individual arrangements have been presented addressing single issues in ensuring data security and compliance. However, companies need to follow a comprehensive set of measures addressing all relevant aspects of data security and compliance in order to play it safe. Thus, in this paper at first technical architectures for using mobile devices in enterprise IT are reviewed. Thereafter a set of compliance rules is presented and, as major contribution, technical measures are explained that enable a company to integrate mobile devices into enterprise IT while still complying with these rules comprehensively. Depending on the company context, one or more of the technical architectures have to be chosen impacting the specific technical measures for compliance as elaborated in this paper. Altogether this paper, for the first time, correlates technical architectures for using mobile devices at the workplace with technical measures to assure data security and compliance according to a comprehensive set of rules.

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The present study aims to investigate the constructs of Technological Readiness Index (TRI) and the Expectancy Disconfirmation Theory (EDT) as determinants of satisfaction and continuance intention use in e-learning services. Is proposed a theoretical model that seeks to measure the phenomenon suited to the needs of public organizations that offer distance learning course with the use of virtual platforms for employees. The research was conducted from a quantitative analytical approach, via online survey in a sample of 343 employees of 2 public organizations in RN who have had e-learning experience. The strategy of data analysis used multivariate analysis techniques, including structural equation modeling (SEM), operationalized by AMOS© software. The results showed that quality, quality disconfirmation, value and value disconfirmation positively impact on satisfaction, as well as disconfirmation usability, innovativeness and optimism. Likewise, satisfaction proved to be decisive for the purpose of continuance intention use. In addition, technological readiness and performance are strongly related. Based on the structural model found by the study, public organizations can implement e-learning services for employees focusing on improving learning and improving skills practiced in the organizational environment

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Apesar do regime político brasileiro permitir a real participação da população na formação da vontade pública, historicamente constatamos um desinteresse da população para com os assuntos políticos. Esse desinteresse para com a política no Brasil transcende diferenças sociais e raciais uma vez que, mesmo os considerados mais politizados raramente se interessam por algum tipo de participação política. No entanto, vemos no ano de 2013 uma quebra desse desinteresse político. Nesse ano, uma série de manifestações, que se seguem até os dias atuais, foram mobilizadas através da atuação de cidadãos por meio das Redes Sociais. Com a recente mobilização da população para com os assuntos políticos, acredita-se que as mesmas abrem uma possibilidade de trazer os assuntos políticos para o dia a dia do cidadão e, para isso, busca-se na disciplina da Semiótica e na Engenharia Semiótica maneiras de informar e interagir com a sociedade sobre temas de cunho político. Para atingir esse objetivo, o presente trabalho propõe o desenvolvimento de um conceito de aplicativo que utilize as informações veiculadas no site da Câmara dos Vereadores de Belo Horizonte. No conceito de aplicativo desenvolvido, os cidadãos poderão opinar sobre as notícias veiculadas no site, ter acesso às informações dos vereadores atualmente eleitos, aprovar ou rejeitar projetos de lei em tramitação e comentar essas informações. Para validar o conceito de aplicativo desenvolvido, será aplicado um questionário estruturado que se baseia no System Usability Scale afim de avaliar a usabilidade do conceito proposto esperando que esse, de fato, facilite a interlocução da sociedade sobre temas públicos.

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Tämän kandidaatintutkielman tarkoituksena on tutkia johdon laskentatoimen kuukau-siraportointia ja sen kehittämistä case-yrityksen avulla. Tutkielman teoriaosuus muo-dostaa työlle sen teoreettisen viitekehyksen. Empiriaosuudessa käsiteltävä kuukausi-raportoinnin kehittäminen alkaa sen lähtötason määrittelemisellä. Tämän jälkeen tun-nistetaan prosessiin liittyviä kehitystä vaativia asioita sekä pyritään löytämään keinot näiden ongelmien ratkaisemiseksi. Tutkielmassa käytettävä empiirinen aineisto on kerätty laadullisen tutkimuksen mene-telmiä käyttäen. Tähän on kuulunut sekä työnteon havainnointia että haastatteluja. Ha-vainnointi koostui kahden kuukaudenvaihteen raportointiprosessin seuraamisesta. Siitä saatua aineistoa hyödynnettiin erityisesti raportoinnin lähtötason määrittämiseksi. Haastatteluja hyödynnettiin puolestaan prosessin ongelmakohtien tunnistamiseksi ja niiden ratkaisemiseksi. Tutkimuksesta selvisi, että case-yrityksen kuukausiraportointiprosessin lähtötilanne on yleisesti ottaen hyvä. Raportoinnille tunnistettiin kolme keskeistä päämäärää: hyvä ai-kataulutus, korkea automaation taso ja analyysin hyödynnettävyys. Koska kuukausira-portointi on jatkuvasti kehittyvä prosessi, on siinä aina jotain parannettavaa. Tutkimuk-sesta nousikin kolme keskeistä raportointiprosessin kehittämiskohdetta: aikataulutuk-sen ja talousosaston sisäisen kommunikaation haasteet, raportointityökalut sekä tie-don tiedon analyysin ja yksiköiden välisen kommunikaation haasteet. Näistä jokaiseen löydettiin konkreettisia parannusehdotuksia, joita case-yritys voi hyödyntää raportoin-tiprosessin päämäärien saavuttamiseksi.

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The human factor is often recognised as a major aspect of cyber-security research. Risk and situational perception are identified as key factors in the decision making process, often playing a lead role in the adoption of security mechanisms. However, risk awareness and perception have been poorly investigated in the field of eHealth wearables. Whilst end-users often have limited understanding of privacy and security of wearables, assessing the perceived risks and consequences will help shape the usability of future security mechanisms. This paper present a survey of the the risks and situational awareness in eHealth services. An analysis of the lack of security and privacy measures in connected health devices is described with recommendations to circumvent critical situations.

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Recovery and the use of routine outcome measurement tools are key topics for mental health nurses. This article reports on research carried out to assess the usability of an outcome measure designed to assess recovery in clinical practice. Results indicate that the Individual Recovery Outcomes Counter (I.ROC) is both easy to use and well liked by services users.

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Palaute ja sen käyttö on osa kehittyvää organisaatiota. Palautteen keräämisessä ja analysoinnissa käytetään usein hyväksi erilaisia laitteita. Käytettävän laitteiston tulisi vastata myös käyttäjänsä tarpeisiin. Tässä tutkimuksessa selvitetään millainen on palautteen keräämiseen ja analysointiin käytettävän Jotos-laitteiston käytettävyys Ilmavoimien teknillisen koulun lentoteknillisessä opetuksessa. Tutkimuksen päämenetelmänä on kirjallisuustutkimus. Tutkimusote on kvalitatiivinen. Tutkimusongelmaan vastataan käytettävyysanalyysin ja teemahaastattelun avulla. Käytettävyysanalyysi on tutkimuksessa toteutettu System Usability Scale arviointilomakkeella. Tutkimusongelma on; Mikä on palautteen keräämiseen käytettävän Jotos-laitteiston käytettävyys Ilmavoimien teknillisen koulun kurssiosastolla? Pääongelman lisäksi tutkimuksessa selvitetään myös keskeiset käsitteet ja palautteen käytön ohjeistusten asettamat suorituskykyvaatimukset palautteen keräämiseen käytettävälle laitteistolle. Tutkimuksessa löydettiin vastaus asetettuihin ongelmiin. Tutkimuksessa selvisi, että Jotos-järjestelmän käytettävyys lentoteknillisessä opetuksessa on välttävällä tasolla. Jotos-järjestelmän ohjelmaa on hankala käyttää, mutta järjestelmän optinen lukija palvelee hyvin lentoteknisen opetuksen tarpeita. Tutkimuksessa tuli ilmi myös Jotos-järjestelmän keskeisimmät käytettävyysongelmat, joita ovat järjestelmän huono virheensietokyky ja epäloogisuus verrattuna tavanomaisiin ohjelmiin.

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Background: Digital forensics is a rapidly expanding field, due to the continuing advances in computer technology and increases in data stage capabilities of devices. However, the tools supporting digital forensics investigations have not kept pace with this evolution, often leaving the investigator to analyse large volumes of textual data and rely heavily on their own intuition and experience. Aim: This research proposes that given the ability of information visualisation to provide an end user with an intuitive way to rapidly analyse large volumes of complex data, such approached could be applied to digital forensics datasets. Such methods will be investigated; supported by a review of literature regarding the use of such techniques in other fields. The hypothesis of this research body is that by utilising exploratory information visualisation techniques in the form of a tool to support digital forensic investigations, gains in investigative effectiveness can be realised. Method:To test the hypothesis, this research examines three different case studies which look at different forms of information visualisation and their implementation with a digital forensic dataset. Two of these case studies take the form of prototype tools developed by the researcher, and one case study utilises a tool created by a third party research group. A pilot study by the researcher is conducted on these cases, with the strengths and weaknesses of each being drawn into the next case study. The culmination of these case studies is a prototype tool which was developed to resemble a timeline visualisation of the user behaviour on a device. This tool was subjected to an experiment involving a class of university digital forensics students who were given a number of questions about a synthetic digital forensic dataset. Approximately half were given the prototype tool, named Insight, to use, and the others given a common open-source tool. The assessed metrics included: how long the participants took to complete all tasks, how accurate their answers to the tasks were, and how easy the participants found the tasks to complete. They were also asked for their feedback at multiple points throughout the task. Results:The results showed that there was a statistically significant increase in accuracy for one of the six tasks for the participants using the Insight prototype tool. Participants also found completing two of the six tasks significantly easier when using the prototype tool. There were no statistically significant different difference between the completion times of both participant groups. There were no statistically significant differences in the accuracy of participant answers for five of the six tasks. Conclusions: The results from this body of research show that there is evidence to suggest that there is the potential for gains in investigative effectiveness when information visualisation techniques are applied to a digital forensic dataset. Specifically, in some scenarios, the investigator can draw conclusions which are more accurate than those drawn when using primarily textual tools. There is also evidence so suggest that the investigators found these conclusions to be reached significantly more easily when using a tool with a visual format. None of the scenarios led to the investigators being at a significant disadvantage in terms of accuracy or usability when using the prototype visual tool over the textual tool. It is noted that this research did not show that the use of information visualisation techniques leads to any statistically significant difference in the time taken to complete a digital forensics investigation.

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Nervous system disorders are associated with cognitive and motor deficits, and are responsible for the highest disability rates and global burden of disease. Their recovery paths are vulnerable and dependent on the effective combination of plastic brain tissue properties, with complex, lengthy and expensive neurorehabilitation programs. This work explores two lines of research, envisioning sustainable solutions to improve treatment of cognitive and motor deficits. Both projects were developed in parallel and shared a new sensible approach, where low-cost technologies were integrated with common clinical operative procedures. The aim was to achieve more intensive treatments under specialized monitoring, improve clinical decision-making and increase access to healthcare. The first project (articles I – III) concerned the development and evaluation of a web-based cognitive training platform (COGWEB), suitable for intensive use, either at home or at institutions, and across a wide spectrum of ages and diseases that impair cognitive functioning. It was tested for usability in a memory clinic setting and implemented in a collaborative network, comprising 41 centers and 60 professionals. An adherence and intensity study revealed a compliance of 82.8% at six months and an average of six hours/week of continued online cognitive training activities. The second project (articles IV – VI) was designed to create and validate an intelligent rehabilitation device to administer proprioceptive stimuli on the hemiparetic side of stroke patients while performing ambulatory movement characterization (SWORD). Targeted vibratory stimulation was found to be well tolerated and an automatic motor characterization system retrieved results comparable to the first items of the Wolf Motor Function Test. The global system was tested in a randomized placebo controlled trial to assess its impact on a common motor rehabilitation task in a relevant clinical environment (early post-stroke). The number of correct movements on a hand-to-mouth task was increased by an average of 7.2/minute while the probability to perform an error decreased from 1:3 to 1:9. Neurorehabilitation and neuroplasticity are shifting to more neuroscience driven approaches. Simultaneously, their final utility for patients and society is largely dependent on the development of more effective technologies that facilitate the dissemination of knowledge produced during the process. The results attained through this work represent a step forward in that direction. Their impact on the quality of rehabilitation services and public health is discussed according to clinical, technological and organizational perspectives. Such a process of thinking and oriented speculation has led to the debate of subsequent hypotheses, already being explored in novel research paths.