122,004 research outputs found
Wathen, W N, [No Service Number]
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/424224Surname: WATHEN. Given Name(s) or Initials: W N. Military Service Number or Last Known Location: [No Registration Number]. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 11755.252087
Item: [2016.0049.56485] "Wathen, W N, [No Service Number]
Reflections on the Middle Space
No full textIn this book, we have described examples of the actors and relationships in our ‘middle space’, that amorphous ground between end-users — those ‘health-interested’ seekers of various kinds of health information and care — and the broad and sometimes murky universe of health information. This final chapter weaves together some of the threads drawn to our attention by the contributors, presents emerging themes regarding the actors and their relationships in this middle space, and considers the implications of these themes for those making policy and practice decisions in health care and health information support. We begin with a discussion of how ‘users’ of health information are defined and situated, then explore specific aspects of info(r)mediation as they affect end-users, with a particular focus on features of mediators that seem to facilitate or be a barrier to the info(r)mediation process; ending with some implications for policy and practice in the areas of health care and health information services. It should be noted that our focus is not so much on health information itself, but the process of health information mediation and how it varies, depending on such contextual factors as professional role, the presence of information and communication technologies, and various sociotechnical configurations. To this end, the ‘circuit of culture’ has provided an analytical framework for situating the actors and their interactions within the set of processes that we call ‘health info(r)mediation’.keywordspublic librarymediation processinformation seekermediator rolehealth information seekerthese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves
The Go-Betweens: Health, Technology and Info(r)mediation.
No full textWelcome or not, most people in western countries are unable to get through a day without receiving a dose of health information. It is available from, passed through or pushed at health help seekers by health care professionals, alternative health care practitioners, pharmaceutical companies, employers, co-workers, friends, family members, vendors of health products and through government-sponsored health promotion campaigns. It is delivered through a variety of media, including self-help books, magazines, leaflets, television and radio advertising and programming and, increasingly, the internet. If the volume of health information present in the public domain in previous decades could be described as a mountain, the current situation might better be described as an avalanche. Recipes or directives about practices for healthy living, as well as information about medical conditions and treatments, prescription drugs and alternative health products and therapies, are everywhere. Against this dense backdrop of advice is the increasingly prevalent notion in public health policy that people, whether as patients, care providers, citizens or, increasingly, consumers, have an obligation to keep themselves informed about health matters.keywordshealth informationhormone replacement therapypublic libraryinformation seekerhealth information exchangethese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves
Fast iterative solvers for PDE-constrained optimization problems
No full textIn this thesis, we develop preconditioned iterative methods for the solution of matrix systems arising from PDE-constrained optimization problems. In order to do this, we exploit saddle point theory, as this is the form of the matrix systems we wish to solve. We utilize well-known results on saddle point systems to motivate preconditioners based on effective approximations of the (1,1)-block and Schur complement of the matrices involved. These preconditioners are used in conjunction with suitable iterative solvers, which include MINRES, non-standard Conjugate Gradients, GMRES and BiCG. The solvers we use are selected based on the particular problem and preconditioning strategy employed. We consider the numerical solution of a range of PDE-constrained optimization problems, namely the distributed control, Neumann boundary control and subdomain control of Poisson's equation, convection-diffusion control, Stokes and Navier-Stokes control, the optimal control of the heat equation, and the optimal control of reaction-diffusion problems arising in chemical processes. Each of these problems has a special structure which we make use of when developing our preconditioners, and specific techniques and approximations are required for each problem. In each case, we motivate and derive our preconditioners, obtain eigenvalue bounds for the preconditioners where relevant, and demonstrate the effectiveness of our strategies through numerical experiments. The goal throughout this work is for our iterative solvers to be feasible and reliable, but also robust with respect to the parameters involved in the problems we consider
Configuring Health Consumers. Health Work and the Imperative of Personel Responsibility.
No full textBand-Toeplitz preconditioners for ill-conditioned Toeplitz systems
No full textPreconditioning for Toeplitz systems has been an active research area over the past few decades. Along this line of research, circulant preconditioners have been recently proposed for the Toeplitz-like system arising from discretizing fractional diffusion equations. A common approach is to combine a circulant preconditioner with the preconditioned conjugate gradient normal residual (PCGRN) method for the coefficient system. In this work, instead of using PCGRN for the normal equation system, we propose a simple yet effective preconditioning approach for solving the original system using the preconditioned minimal residual (PMINRES) method that can achieve convergence guarantees depending only on eigenvalues. Namely, for a large class of ill-conditioned Toeplitz systems, we propose a number of preconditioners that attain the overall O(nlog n) complexity. We first symmetrize the given Toeplitz system by using a permutation matrix and construct a band-Toeplitz plus circulant preconditioner for the modified system. Then, under certain assumptions, we show that the eigenvalues of the preconditioned system are clustered around ± 1 except a number of outliers and hence superlinear convergence rate of PMINRES can be achieved. Particularly, we indicate that our solver can be applied to solve certain fractional diffusion equations. An extension of this work to the block Toeplitz case is also included. Numerical examples are provided to demonstrate the effectiveness of our proposed method
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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