4,101 research outputs found

    Social exclusion and land administration in Orissa, India

    Get PDF
    The authors report on the first empirical study of its kind to examine - from the perspective of transaction costs - factors that constrain access to land for the rural poor and other socially excluded groups in India. They find that: a) Land reform has reduced large landholdings since the 1950s. Medium size farms have gained most. Formidable obstacles still prevent the poor from gaining access to land. b) The complexity of land revenue administration in Orissa is partly the legacy of distinctly different systems, which produced more or less complete and accurate land records. These not-so-distant historical records can be important in resolving contemporary land disputes. c) Orissa tried legally to abolish land-leasing. Concealed tenancy persisted, with tenants having little protection under the law. d) Women's access to and control over land, and their bargaining power with their husbands about land, may be enhanced through joint land titling, a principle yet to be realized in Orissa. e) Land administration is viewed as a burden on the state rather than a service, and land records and registration systems are not coordinated. Doing so will improve rights for the poor and reduce transaction costs - but only if the system is transparent and the powerful do not retain the leverage over settlement officers that has allowed land grabs. Land in Orissa may be purchased, inherited, rented (leased), or - in the case of public land and the commons - encroached upon. Each type of transaction - and the State's response, through land law and administration - has implications for poor people's access to land. The authors find that: 1) Land markets are thin and transaction costs are high, limiting the amount of agricultural land that changes hands. 2) The fragmentation of landholdings into tiny, scattered plots is a brake on agricultural productivity, but efforts to consolidate land may discriminate against the rural poor. Reducing transaction costs in land markets will help. 3) Protecting the rural poor's rights of access to common land requires raising public awareness and access to information. 4) Liberalizing land-lease markets for the rural poor will help, but only if the poor are ensured access to institutional credit.Banks&Banking Reform,Public Sector Management and Reform,Environmental Economics&Policies,Land Use and Policies,Urban Governance and Management,Public Sector Management and Reform,Environmental Economics&Policies,Banks&Banking Reform,Rural Land Policies for Poverty Reduction,Land Use and Policies

    Analysis of Selective Laser Sintering print parameter modelling methodologies for energy input minimisation : a thesis presented in partial fulfilment of the requirements for the degree of Master of Engineering in Mechatronics at Massey University, Albany, New Zealand

    Get PDF
    Additive Manufacturing (AM) is the name given to a series of processes used to create solids, layer upon layer, from 3 Dimensional (3D) models. As AM experiences rapid growth there exists an opportunity for Selective Laser Sintering (SLS) to expand into markets it has not previously accommodated. One of the ways SLS can accomplish this is by expanding the range of materials that can be processed into useful products, as currently only a small number of materials are available when compared to other AM technologies. One of the biggest barriers to the adoption of materials is the danger inherent to high-energy processes such as SLS. The aim of this research was to identify opportunities to improve current methods for modelling the relationship between material specifications, and printing parameters. This was achieved by identifying existing models used to determine printing parameters for a new material, identifying weaknesses in current modelling processes, conducting experimentation to explore the validity of these weaknesses, and exploring opportunities to improve the model to address these weaknesses. The current models to determine printer parameters to achieve successful sintering include both the Sintering Window (SW) and the Energy Melt Ratio (EMR). These two models are complementary, and both are required to establish all common print parameters. They include both thermal and physical powder properties, but do not include any optical properties. This is significant because the nature of the SLS printing process relies on concentrated delivery of laser energy to achieve successful sintering. Analysis of two similar polyamide powders, one black and one white, identified that the two powders were similar thermally and physically, which meant the models predicted that they should both sinter successfully utilizing the same set of print parameters. Results of the experimental trials showed that no trials involving the white powder sintered successfully, and trials involving the black powder suffered from issues with either insufficient energy to successfully remove parts without damage, or excessive energy causing excess powder to bond to the part. Further experimentation was carried out to investigate the differences in optical properties using Fourier Transform Infrared Spectroscopy (FTIR) and Spectrofluorophotometry. FTIR revealed that there was a difference in absorption as a material property, indicating that differences in laser energy absorption could explain the results seen in the trials. Spectrofluorophotometry revealed minimal differences in fluorescence of the powders, suggesting it an unlikely source of energy loss. Future work is recommended to research a standardised form of testing setup that can be used to categorize the reflectance of a material, as current work relies on proprietary experimental setups. Finding methods of classifying the laser absorption that is easily available to operators would enable refinement of the EMR equation to reflect the energy losses during printing, and remove another barrier for adoption of new materials

    CARMA : complete autonomous responsible management agent (system)

    Full text link
    University of Technology, Sydney. Faculty of Engineering and Information Technology.The continuing expansion of telecommunication service domains, from Quality of Service guaranteed connectivity to ubiquitous cloud environments, has introduced an ever increasing level of complexity in the field of service management. This complexity arises not only from the sheer variability in service requirements but also through the required but ill-defined interaction of multiple organisations and providers. As a result of this complexity and variability, the provisioning and performance of current services is adversely affected, often with little or no accountability to the users of the service. This exposes a need for total coverage in the management of such complex services, a system which provides for service responsibility. Service responsibility is defined as the provisioning of service resilience and the judgement of service risk across all the service components. To be effective in responsible management for current complex services, any framework must be able to interact with multiple providers and management systems. The CARMA framework proposed by this thesis, aims to fulfil these requirements through a multi-agent system, that is based in a global market, and can negotiate and be responsible for multiple complex services. The research presented in this thesis draws upon previous research in the fields of Network Management and Cloud service management, and utilises agent technology to build a system that is capable of providing resilient and risk aware management of services comprised of multiple providers. To this end the research aims to present the architecture, agent functionality and interactions of the CARMA system, as well as the structure of the marketplace, contract specification and risk management. As the scope and concepts of the proposed system are relatively unexplored, a model and simulation were developed to verify the concepts, explore the issues, assess the assumptions and validate the system. The results of the simulation determined that the introduction of CARMA has the potential to reduce the risk in contracting new services, increase the reliability of contracted services, and increase the utility of providers participating in the market

    Three new African Weaver-birds of the genera Estrilda and Granatina

    Get PDF
    Volume: I

    Critique of network management systems and their practicality

    Full text link
    Networks have become an integral part of the computing landscape, forming a global interconnection of a staggering number of heterogeneous systems and services. Current research focuses on policy based management and autonomous systems and involves the utilisation of very different languages and technologies in concert. This paper examines four current proposals for autonomous network management and analyses them using architectural modelling, against a measure of practicality, as expressed by scalability, reliability and maintainability. © 2010 IEEE

    Downscaling extremes: A comparison of extreme value distributions in point-source and gridded precipitation data

    Get PDF
    There is substantial empirical and climatological evidence that precipitation extremes have become more extreme during the twentieth century, and that this trend is likely to continue as global warming becomes more intense. However, understanding these issues is limited by a fundamental issue of spatial scaling: most evidence of past trends comes from rain gauge data, whereas trends into the future are produced by climate models, which rely on gridded aggregates. To study this further, we fit the Generalized Extreme Value (GEV) distribution to the right tail of the distribution of both rain gauge and gridded events. The results of this modeling exercise confirm that return values computed from rain gauge data are typically higher than those computed from gridded data; however, the size of the difference is somewhat surprising, with the rain gauge data exhibiting return values sometimes two or three times that of the gridded data. The main contribution of this paper is the development of a family of regression relationships between the two sets of return values that also take spatial variations into account. Based on these results, we now believe it is possible to project future changes in precipitation extremes at the point-location level based on results from climate models.Comment: Published in at http://dx.doi.org/10.1214/09-AOAS287 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org

    The Community Hopes, Fears and Actions Survey: Survey method, sample representativeness and data quality

    No full text
    This paper describes and discusses the method used to collect data on the hopes, fears and actions of Australians in relation to the tax system in 2000. Data were collected from June through to October 2000 by means of a national survey of Australians who were randomly selected from the publicly available electoral rolls. A response rate of 29% yielded 2040 questionnaires that could be used for further analysis. Diagnostic statistics comparing the sample with Australian Bureau of Statistics population estimates on age, sex, occupation and education suggested that the sample was broadly representative of the population, but with some bias in favour of those involved in occupations in which reading and writing skills are integral. The survey also underrepresented younger age groups, a bias that is shared with many other social surveys of this kind. A number of regression models were run to find out if responses were affected by anonymity, time taken to respond to the survey and the introduction of the goods and services tax (GST) during the survey period. No evidence was forthcoming to suggest a direct relationship between any of these variables and tax-related attitudes and behaviours. We conclude that these data provide a satisfactory base for examining the relationships outlined and discussed in the Centre for Tax System Integrity Working Papers No. 2 and No. 3 (Braithwaite, 2001; Braithwaite, Reinhart, Mearns & Graham, 2001)

    Teaching to learn and learning to share : assessing a culture of sharing amongst information and knowledge management students in a virtual environment.

    Get PDF
    Knowledge and information sharing has become synonymous with the concept of creating value and power for organisations. Knowledge is being recognised as a valuable asset and the promotion and dissemination of information and knowledge in its internal workings has the aim of creating learning organisations. The sharing of information and knowledge creates a community where participants can collaborate with each other in achieving their goals. In a knowledge management course in the Department of Information and Knowledge Management, at the University of Johannesburg (South Africa), students are introduced to these concepts as part of their training to pursue various careers as information and knowledge workers within organisations where these concepts have to be applied Using a philosophy of teaching by example, students are encouraged to share information and knowledge, making use of discussion boards in a virtual learning environment as part of a multiwmodal learning approach that includes facewtowface lectures as well as an online interactive environment. Discussion topics are provided in line with a case study that students are requested to analyse. Students' reflections on the learning that has taken place, based on the responses to the discussion topics, form part of the case study analysis which is assessed. The purpose of the research is to gain insight into the effectiveness of information and knowledge sharing in a virtual environment using discussion boards in terms of its impact to generate a learning culture. A mixed methods approach is applied to 210 registered students in a second year group and 123 registered students in a third year group by monitoring their discussions on allocated topics. Firstly, content analysis methodology is applied to assess the knowledge sharing that is taking place in the virtual environment. Secondly, a survey is conducted at the end of the discussion period to determine student experiences, perceptions and opinions on the knowledge sharing process and is used to adapt and develop the course design. Thirdly, students are required to reflect on the learning experiences as part of the submitted case stUdy analysis assignment. The discussion monitoring will investigate the following variables: (1) student participation rates, frequency and patterns; as well as (2) cognitive and meta-cognitive components of student messages. The survey and reflection will be used to assess the students' (3) perception of learning through sharing; (4) experiences of group dynamics and (5) their perceived individual performances based on the discussion groups. This research includes an investigation of using different group dynamics to compare the experiences of students being managed in a randomly selected group as opposed to students signing up to a group of their own choice. It is hypothesised that the findings from this research will provide important answers required to facilitate students with diverse skills and socio-economic backgrounds in their cognitive and meta­cognitive development for information and knowledge sharing when making use of online discussions boards
    corecore