977 resultados para Rationale


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End-user experience with information presumably considered as one of the prominent factors shaping the adoption of web-based electronic services. User interfacing with large amount of information the rationale is to deduce the effect in the current web-based task environment. Understanding user’s perception on the basis of the prior experience with information may provide insights into what constitutes in driving those perceptions and their effect in the current and future task in web-based electronic services. The paper lays the theoretical context of end-user experience with information and proceeds further in an attempt to distinguish the role in web-based electronic services.

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This paper presents a performance study of four statistical test algorithms used to identify smooth image blocks in order to filter the reconstructed image of a video coded image. The four algorithms considered are the Coefficient of Variation (CV), Exponential Entropy of Pal and Pal (E), Shannon's (Logarithmic) Entropy (H), and Quadratic Entropy (Q). These statistical algorithms are employed to distinguish between smooth and textured blocks in a reconstructed image. The linear filtering is carried out on the smooth blocks of the image to reduce the blocking artefact. The rationale behind applying the filter on the smooth blocks only is that the blocking artefact is visually more prominent in the smooth region of an image rather than in the textured region.

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This paper describes the rationale for and approach to research that is investigating the context, use and effects of a new teaching and learning online environment on the pedagogical practices of academics in a Faculty of Education in a traditional university setting. The use of online communication software is not new to the university. There is a history of use of a different suite of online communication software, but a new set of ‘tools’ was imposed in a top down model. Associated with this imposition was a requirement that all units in all courses make use of this software at least at a most basic level.

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How do teacher educators prepare students to become teachers for a world which is global in its outlook and influences? There are now strong imperatives for teacher educators to develop pre- service students' understandings about a world which is 'global'. It is not only curriculum statements, textbooks, films, videos, that are the carriers and resources in global education but teachers themselves through their own stories
and narratives and the meanings attached to these. The role of teachers' lived experiences in teaching global education is often silenced in teacher education courses, policy documents and school classrooms.

In searching for meaning in global education, it is the capacity of the teacher to reflect not only on their own multiple identities but on the nexus between their local and global worlds and the struggle often evident here. A resource teachers have to teach global education is their own stories, lived experiences of being in a global world. This comes from giving meaning to travel, of living in a multi-cultural multi-faith world of viewing and noticing similarities and differences and giving meaning to these.

Despite increasing demands from education systems and governments for teachers to teach with a global focus, many teachers do not feel confident or prepared to do so. Importantly curriculum policy statements are carrying imperatives to teach to a global world that is rapidly changing. Curriculum statements in Society and Environment area in Australia include 'global' in their rationale. However this does not mean that global education is taught nor understood by teachers who translate these documents to practice. In curriculum documents such as those
produced by the state and territory governments there is some inclusion of global education. Singh (1998) argues that there is a marginalisation of global education in official curriculum policies in Australia. Integrating global education into different subjects is really up to the creativity, expertise and experience of teachers. If it is up to teachers to teach global education as stated by Singh then it will be the capacity of the teacher to draw on a range of resources, pedagogy and approaches to teach global education. One resource is teachers' stories and
narratives and students own lived experiences and stories.

Banks (2001, p. 5) states that "teachers must develop reflective cultural national and global identifications themselves if they are to help students become thoughtful caring and reflective citizens in a multicultural world society." Teacher educators who wish to embed global perspectives in their teaching require reflective practices on their own identities, prejudices, choice of curriculum content and pedagogy.

Teaching global education requires a conscious understanding and reflection to begin the journey of self as located in the classroom. The central issue of this paper is to bring forth emphasis on the lived experiences of teachers and teachers educators in order to develop deeper global understandings in students.

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In this paper we present the rationale and outcome of a University strategically funded project aimed at developing a broad range of cases illuminating good practices in the development and use of digital media and online technologies at Deakin University. The project is aimed at supporting the ongoing implementation of the University’s suite of e-learning technologies, Deakin Studies Online (DSO). It was seen as a significant strategic academic professional development initiative by the University in bringing together perspectives on effective teaching and learning in the context of various disciplines and professional fields of practice, with DSO possibilities for enhanced teaching/learning quality, efficiency, accessibility and satisfaction. The ‘case’ as a useful means of developing practice is outlined, along with the various project processes involving case selection, development, production and promotion. Finally, reflections on the outcomes of the project are considered. A number of positive though largely unintended consequences are identified

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‘Team teaching’ across disciplines at Australian universities is rare. Academics are rigorous in developing specific disciplinary expertise that often prevents collaboration outside of their disciplinary area. In pre-service primary education courses, academics often teach in traditional and exclusive disciplinary approaches. This separation is at odds however with the impetus for a pedagogical move forward towards an interdisciplinary approach in primary schools. The authors contend that primary
teacher educators must model effective interdisciplinary practice to their student teachers and unpack the processes of how to make meaningful connections together. This paper presents the work of two teacher educators who are involved in a broader, innovative, team teaching, field based collaboration with schools and non-school settings for the Bachelor of Teaching (Postgraduate) at Deakin University. In this paper, the authors firstly discuss their rationale for adopting a team teaching approach and describe how they are working towards an interdisciplinary model, bringing together the two areas; music and literacy and providing examples from their team teaching experience. The paper concludes with reflections and recommendations for future team teaching at the tertiary level.

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The fact that children growing up in poverty are likely to be in the lower ranges of achievement on standardised literacy tests is not a new phenomenon. Internationally there are a myriad of intervention and remedial programmes designed to address this problem with a range of effects. Frequently, sustainable reforms are curtailed by deficit views of families and children growing up in poverty. This article describes an ongoing research study entitled "Teachers Investigate Unequal Literacy Outcomes: Cross-Generational Perspectives", which made teacher researchers central in examining this long-standing dilemma. It outlines the research design and rationale, and analyses how two early career teachers worked their ways out of deficit analyses of two children they were most worried about. It argues that disrupting deficit discourses and re-designing new pedagogical repertoires to reconnect with children's lifeworlds is a long-term project that can best be achieved in reciprocal research relationships with teachers.

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Purpose – This paper aims to bring together and evaluate the reasons that have historically been advanced to justify the heavy emphasis on innovative consumers within the general context of the adoption of products and services, and to assess the strategic benefits to be gained from targeting such market segments.

Design/methodology/approach – The approach is critical review and analysis of the published
literature.

Findings – This paper finds that, although the benefits of identifying innovative early adopters are not as strong and clear-cut as is often claimed, they are still sufficient to warrant further research into methods that will accurately identify them and predict their purchasing behaviour.

Practical implications – Targeting strategies should distinguish carefully between truly innovative consumers and other early adopters. The costs of identifying them in a particular market need to be weighed against the potential benefits.

Originality/value – Although many studies have attempted to address the question of what drives individual adoption behaviour, the rationale for that focus has not been well established and is rarely critiqued. In clarifying the situation, this paper should provide guidance for academic researchers and marketing planners.

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As demand for fresh water intensifies, wastewater is frequently being seen as a valuable resource. Furthermore, wise reuse of wastewater alleviates concerns attendant with its discharge to the environment. Globally, around 20 million ha of land are irrigated with wastewater, and this is likely to increase markedly during the next few decades as water stress intensifies. In 1995, around 2.3 billion people lived in water-stressed river basins and this could increase to 3.5 billion by 2025. We review the current status of wastewater irrigation by providing an overview of the extent of the practice throughout the world and through synthesizing the current understanding of factors influencing sustainable wastewater irrigation. A theme that emerges is that wastewater irrigation is not only more common in water-stressed regions such as the Near East, but the rationale for the practice also tends to differ between the developing and developed worlds. In developing nations, the prime drivers are livelihood dependence and food security, whereas environmental agendas appear to hold greater sway in the developed world. The following were identified as areas requiring greater understanding for the long-term sustainability of wastewater irrigation: (i) accumulation of bioavailable forms of heavy metals in soils, (ii) environmental fate of organics in wastewater-irrigated soils, (iii) influence of reuse schemes on catchment hydrology, including transport of salt loads, (iv) risk models for helminth infections (pertinent to developing nations), (v) microbiological contamination risks for aquifers and surface waters, (vi) transfer efficiencies of chemical contaminants from soil to plants, (vii) health effects of chronic exposure to chemical contaminants, and (viii) strategies for engaging the public.

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Rationale: The molecular mechanisms of muscle atrophy in chronic obstructive pulmonary disease (COPD) are poorly understood. In wasted animals, muscle mass is regulated by several AKT-related signaling pathways.
Objectives: To measure the protein expression of AKT, forkhead box class O (FoxO)-1 and -3, atrogin-1, the phosphophrylated form of AKT, p70S6K glycogen synthase kinase-3ß (GSK-3ß), eukaryotic translation initiation factor 4E binding protein-1 (4E-BP1), and the mRNA expression of atrogin-1, muscle ring finger (MuRF) protein 1, and FoxO-1 and -3 in the quadriceps of 12 patients with COPD with muscle atrophy and 10 healthy control subjects. Five patients with COPD with preserved muscle mass were subsequently recruited and were compared with six patients with low muscle mass.
Methods: Protein contents and mRNA expression were measured by Western blot and quantitative polymerase chain reaction, respectively.
Measurements and Main Results: The levels of atrogin-1 and MuRF1 mRNA, and of phosphorylated AKT and 4E-BP1 and FoxO-1 proteins, were increased in patients with COPD with muscle atrophy compared with healthy control subjects, whereas atrogin-1, p70S6K, GSK-3ß, and FoxO-3 protein levels were similar. Patients with COPD with muscle atrophy showed an increased expression of p70S6K, GSK-3ß, and 4E-BP1 compared with patients with COPD with preserved muscle mass.
Conclusions: An increase in atrogin-1 and MuRF1 mRNA and FoxO-1 protein content was observed in the quadriceps of patients with COPD. The transcriptional regulation of atrogin-1 and MuRF1 may occur via FoxO-1, but independently of AKT. The overexpression of the muscle hypertrophic signaling pathways found in patients with COPD with muscle atrophy could represent an attempt to restore muscle mass.

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Background: Depression amongst adolescents is a costly societal problem. Little research documents the effectiveness of public mental health services in mapping this problem. Further, it is not clear whether usual care in such services can be improved via clinician training in a relevant evidence based intervention. One such intervention, found to be effective and easily learned amongst novice clinicians, is Interpersonal Psychotherapy (IPT). The study described in the current paper has two main objectives. First, it aims to investigate the impact on clinical care of implementing Interpersonal Psychotherapy for Adolescents for the treatment of adolescent depression within a rural mental health service compared with Treatment as Usual (TAU). The second objective is to record the process and challenges (i.e. feasibility, acceptability, sustainability) associated with implementing and evaluating an evidence-based intervention within a community service. This paper outlines the study rationale and design for this community based research trial.

Methods/design: The study involves a cluster randomisation trial to be conducted within a Child and Adolescent Mental Health Service in rural Australia. All clinicians in the service will be invited to participate.  Participating clinicians will be randomised via block design at each of four sites to (a) training and delivery of IPT, or (b) TAU. The primary measure of impact on care will be a clinically significant change in depressive  symptomatology, with secondary outcomes involving treatment satisfaction and changes in other symptomatology. Participating adolescents with significant depressive symptomatology, aged 12 to 18 years, will complete assessment measures at Weeks 0, 12 and 24 of treatment. They will also complete a depression inventory once a month during that period. This study aims to recruit 60 adolescent participants and their parent/guardian/s. A power analysis is not indicated as an intra-class correlation coefficient will be calculated and used to inform sample size calculations for subsequent large-scale trials. Qualitative data regarding process implementation will be collected quarterly from focus groups with participating clinicians over 18 months, plus phone interviews with participating adolescents and parent/guardians at 12 weeks and 24 weeks of treatment. The focus group qualitative data will be analysed using a Fourth Generation Evaluation methodology that includes a constant comparative cyclic analysis method.

Discussion
: This study protocol will be informative for researchers and clinicians interested in considering, designing and/or conducting cluster randomised trials within community practice such as mental health services.

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The purpose of this paper is to present and analyse a case example of the development and implementation of a digital learnmg object in context with academic literature in the field. The paper's content describes the creation of a multimedia learning object from conception in 2004 to completion m 2006. Provided is the rationale and outcome of a strategically funded University project aimed at illuminating an industrial case study of good management and communication practices for use in classrooms throughout the entire university. This paper is intended to act as a guide for others. Our experience as academics in successful dialogue With educational technologists will inspire and inform those embarking on similar projects, and aspects of it will generalise to development and implementation Issues for other kinds of learning objects.

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Many countries receive illegal migrants but are reluctant to accept them due to possible negative externalities. We provide a rationale for not policing illegal migration by linking it to the tourism industry. By paying illegal migrants less than local workers, the relative price of the non-traded goods is shown to be lower than it would be in the absence of such workers. An expansion in tourist trade, under certain intensity conditions, necessarily raises resident welfare and employment. This tourist boom necessarily lowers the welfare of the illegal migrants. It is established that an increase in tourism increases the supply of illegal migrants.

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This article describes an ethnographic study of children's behavioural interaction with multimedia within a familiar context. The rationale for such a study was to provide data and evaluation of the capabilities of young children in an expressly modified multimedia environment and to determine the usefulness of employing technology as an adjunct to young children's play. However, hermeneutic and interpretativist concerns for the study of human action and social practice in the use of technology also informs both the structural, procedural, and evaluative management of the study. Using customised children's software, observation focused on time spent using the computer, the attitude toward the computer, the reaction to the interface, their use and adaptation of the mouse, and adult interventions. Significantly, the results differ appreciably from previous research and possible grounds for this variation is explored.

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Objectives This article aims to define what is action research and where it fits in with health promotion practice, through drawing upon associated literature and personal action research experience. It also seeks to investigate the possible reasons why it is that health promotion researchers have not readily taken on the processes of action research strategies.

Rationale The place of action research in health promotion programmes is an important yet relatively unacknowledged and understated activity. It has proven to be very popular with other professional groups, such as in the education, management and social sciences. In terms of health service activity, it is widely established in the fields of nursing and mental health and is beginning to establish itself in medicine. While there are a few health promotion examples to draw upon, they tend to be isolated, dated and often lie outside of the mainstream literature. It is suggested that this continuing state of affairs denies many health promotion researchers a valuable resource for managing effective change in practice.

Conclusion
The authors suggest that action research is both a valid and
important research method for health promotion researchers, who are advised to further consider its merits in future studies. This article draws attention to the National Health Service (NHS) South West Regional Office-commissioned Our Healthier Nation: Improving the Competence of the Workforce in Health Promotion participatory action research project, as a means of promoting and validating action research strategy. The authors were all actively involved in this project.