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Dissertations / Theses on the topic 'Digital aid'
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1
Udayashankara, V. "DSP Techniques for Performance Enhancement of Digital Hearing Aid." Thesis, Indian Institute of Science, 1995. http://hdl.handle.net/2005/156.
Full textAbstract:
Hearing impairment is the number one chronic disability affecting people in the world. Many people have great difficulty in understanding speech with background noise. This is especially true for a large number of elderly people and the sensorineural impaired persons. Several investigations on speech intelligibility have demonstrated that subjects with sensorineural loss may need a 5-15 dB higher signal-to-noise ratio than the normal hearing subjects. While most defects in transmission chain up to cochlea can nowadays be successfully rehabilitated by means of surgery, the great majority of the remaining inoperable cases are sensorineural hearing impaired, Recent statistics of the hearing impaired patients applying for a hearing aid reveal that 20% of the cases are due to conductive losses, more than 50% are due to sensorineural losses, and the rest 30% of the cases are of mixed origin. Presenting speech to the hearing impaired in an intelligible form remains a major challenge in hearing-aid research today. Even-though various methods have been suggested in the literature for the minimization of noise from the contaminated speech signals, they fail to give good SNR improvement and intelligibility improvement for moderate to-severe sensorineural loss subjects. So far, the power and capability of Newton's method, Nonlinear adaptive filtering methods and the feedback type artificial neural networks have not been exploited for this purpose. Hence we resort to the application of all these methods for improving SNR and intelligibility for the sensorineural loss subjects. Digital hearing aids frequently employ the concept of filter banks. One of the major drawbacks of this techniques is the complexity of computation requiring more number of multiplications. This increases the power consumption. Therefore this Thesis presents the new approach to speech enhancement for the hearing impaired and also the construction of filter bank in Digital hearing aid with minimum number of multiplications. The following are covered in this thesis.
One of the most important application of adaptive systems is in noise cancellation using adaptive filters. The ANC setup requires two input signals (viz., primary and reference). The primary input consists of the sum of the desired signal and noise which is uncorrelated. The reference input consists of mother noise which is correlated in Some unknown way with noise of primary input. The primary signal is obtained by placing the omnidirectional microphone just above one ear on the head of the KEMAR mannikan and the reference signal is obtained by placing the hypercardioid microphone at the center of the vertebral column on the back. Conventional speech enhancement techniques use linear schemes for enhancing speech signals. So far Nonlinear adaptive filtering techniques are not used in hearing aid applications. The motivation behind the use of nonlinear model is that it gives better noise suppression as compared to linear model. This is because the medium through which signals reach the microphone may be highly nonlinear. Hence the use of linear schemes, though motivated by computational simplicity and mathematical tractability, may be suboptimal. Hence, we propose the use of nonlinear models to enhance the speech signals for the hearing impaired: We propose both Linear LMS and Nonlinear second order Volterra LMS schemes to enhance speech signals. Studies conducted for different environmental noise including babble, cafeteria and low frequency noise show that the second-order Volterra LMS performs better compared to linear LMS algorithm. We use measures such as signal-to-noise ratio (SNR),
time plots, and intelligibility tests for performance comparison.
We also propose an ANC scheme which uses Newton's method to enhance speech signals. The main problem associated with LMS based ANC is that their convergence is slow and hence their performance becomes poor for hearing aid applications. The reason for choosing Newton's method is that they have high performance adaptive-filtering methods that often converge and track faster than LMS method. We propose two models to enhance speech signals: one is conventional linear model and the other is a nonlinear model using a second order Volterra function. Development of Newton's type algorithm for linear mdel results in familiar Recursive least square (RLS) algorithm. The performance of both linear and non-linear Newton's algorithm is evaluated for babble, cafeteria and frequency noise. SNR, timeplots and intelligibility tests are used for performance comparison. The results show that Newton's method using Volterra nonlinearity performs better than RLS method.
ln addition to the ANC based schemes, we also develop speech enhancement for the hearing impaired by using the feedback type neural network (FBNN). The main reason is that here we have parallel algorithm which can be implemented directly in hardware. We translate the speech enhancement problem into a neural network (NN) framework by forming an appropriate energy function. We propose both linear and nonlinear FBNN for enhancing the speech signals. Simulated studies on different environmental noise reveal that the FBNN using the Volterra nonlinearity is superior to linear FBNN in enhancing speech signals. We use SNR, time plots, and intelligibility tests for performance comparison.
The design of an effective hearing aid is a challenging problem for sensorineural hearing impaired people. For persons with sensorineural losses it is necessary that the frequency response should be optimally fitted into their residual auditory area. Digital filter enhances the performance of the hearing aids which are either difficult or impossible to realize using analog techniques. The major problem in digital hearing aid is that of reducing power consumption. Multiplication is one of the most power consuming operation in digital filtering. Hence a serious effort has been made to design filter bank with minimum number of multiplications, there by minimizing the power consumption. It is achieved by using Interpolated and complementary FIR filters. This method gives significant savings in the number of arithmetic operations.
The Thesis is concluded by summarizing the results of analysis, and suggesting scope for further investigation
2
Waterman, Niall. "The design and development of a digital hearing aid." Thesis, University of Ulster, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261058.
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3
Stempeck, Matt (Matt Kelly). "Participatory aid marketplace : designing online channels for digital humanitarians." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82434.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2013.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 215-236).
Recent years have seen an increase in natural and man-made crises. Information and communication technologies are enabling citizens to contribute creative solutions and participate in crisis response in myriad new ways, but coordination of participatory aid projects remains an unsolved challenge. I present a wide-ranging case library of creative participatory aid responses and a framework to support investigation of this space. I then co-design a Marketplace platform with leading Volunteer & Technical Communities to aggregate participatory aid projects, connect skilled volunteers with relevant ways to help, and prevent fragmentation of efforts. The result is a prototype to support the growth of participatory aid, and a case library to improve understanding of the space. As the networked public takes a more active role in its recovery from crisis, this work will help guide the way forward with specific designs and general guidelines.
by Matt Stempeck.
S.M.
4
Kaneko, Kenichi. "Nonlinear Digital Hearing Aid with Near-Instantaneous Amplitude Compression." Kyoto University, 2002. http://hdl.handle.net/2433/150217.
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Madden, Josephine Anne. "Digital processing of speech for hearing loss of cochlear origin." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335429.
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Jardine, Lewis Frier. "Digital image processing as an aid to camouflage design and assessment." Thesis, Cranfield University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276874.
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Nahid, Kaveh. "The development of a true digital hearing aid using custom VLSI technology." Thesis, University of Kent, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358170.
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Danezis, C. "Assessment of the ability of digital terrain models to aid GPS tracking of people and animals." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1331877/.
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The advent of global navigation satellite systems, and especially GPS, signified a new era in navigation. Although GPS tends to be a panacea in terms of positioning and tracking, there are still cases whereby severe problems can render navigation virtually impossible. Difficult GNSS environments such as forests, heavy canopy covered areas, or urban canyons can have a negative impact on the propagation of satellite signal and introduce large errors in positioning due to signal attenuation. Several techniques have been developed to deal with this issue, e.g. integrated GNSS/INS navigation configurations. This thesis focuses on the application of terrain aiding and its impact on the availability, accuracy, and reliability of GNSS positioning. Furthermore, it examines the impact of using GNSS receivers of different grade and different chipset sensitivity in such operations. Two main experiments were carried out; the first was conducted in the mountains of Transylvania, in Romania. This project was sponsored by the European GNSS supervisory authority, and involved the tracking of animals (bears in this case). The second experiment was held in Greenwich Park, London, using an accurate terrain model, kindly provided by the Ordnance Survey of Great Britain. In both cases, new algorithms have been developed to combine satellite tracking with local terrain models to improve positioning performance. The results indicate that in the case of standard sensitivity receivers the use of an accurate digital terrain model can improve positioning availability by as much as 74%, and the accuracy of normal four-satellite positioning by a factor of up to five. Furthermore, it was found that, for both standard and high sensitivity receivers, the external reliability of position fixes can be improved by an average of 40%, and up to 90% in some cases.
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Moyle, Kathryn, and Kathryn Moyle@canberra edu au. "Digital technologies in Australian public schools : a narrative study of government policies." Swinburne University of Technology, 2002. http://adt.lib.swin.edu.au./public/adt-VSWT20060721.132427.
Full textAbstract:
Policies advocating the use of digital technologies in government schools
are promoted by all public school education systems in Australia. This is
reflected in the release of political media statements, policies, plans,
budgets, digital networking rollouts, curriculum developments, and
professional development activities. Resources are being directed towards
such initiatives from within school education budgets and from
departmental and 'whole of government' initiatives, at state, territory and
federal levels. While there is considerable activity being supported by
governments, outside of these activities academic publications specifically
about these school level initiatives are limited.
This research sets out to answer the question: 'what does public schooling
mean in Australia in the 21st century given its past tradition of free,
compulsory and secular schooling, and given the present policies that are
urging the ubiquitous use of digital technologies?' The purpose of this
research is to interpret, understand and explain the policies of the public
schooling systems in Australia advocating the use of digital technologies. In
doing so, this thesis aims to contribute to the development of a stock of
Australian research specifically in the schooling sector, about the use of
digital technologies in schools. Further, this thesis aims to stimulate and add
to the conversations concerning these policies. It is argued that the use of
digital technologies in schooling has the capacity to redefine what has
previously been understood by 'public schooling'.
This thesis is the outcome of an interpretative social inquiry where narrative
theory and hegemony have provided its theoretical bases. This thesis has not
set out to merge these theories nor has it attempted to reconcile the internal
differences within them, but rather, to draw from them, and to use
approaches that are pertinent to this study. While such an approach may be
contentious and bring some inherent difficulties, the intention of the research has been to draw upon the abstract understandings afforded by
these theories and apply them to concrete, particular, yet newly emerging
educational activities. This is to provide interpretative and explanatory
perspectives to the advocated use of digital technologies in Australian
schools and systems, and, in Chapter Six, to forward a proposition for future
action.
There are several different ways in which this thesis could have been
approached and finally could have been structured. Likewise, there are
many avenues that require research but have been left without investigation
due to limitations of size, space and time. This is not to negate their
importance, but rather it is to recognise the limits of this project and to
highlight the necessity for more research to be undertaken.
Throughout the thesis distance education has been considered in conjunction
with the policies directly impinging upon 'face to face' schooling. It is
argued that with the advocated use of digital technologies as an inherent part
of public schooling, there is emerging, a convergence in these two styles of
schooling. Further it is argued that experiences from school level distance
education practitioners have the potential to offer some insights that may be
useful for those in 'face to face' schools using digital technologies. It is
intended then, that the implications from this research will have the capacity
to influence how we view centrally developed school education policies,
curriculum leadership and management as well as what is intended to
happen in the classroom.
The thesis has been arranged into three parts. The first three chapters
comprise Part One. Chapter One identifies the research space for the thesis.
This is achieved by describing the fields of research from which this thesis
draws, and introduces the theoretical bases used in the research space
identified for this thesis. Chapter Two provides the theoretical bases for the
thesis in more detail. In doing so, positivist approaches to the research are
rejected. Chapter Three describes the research methods used to interpret,understand and explain the public schooling sectors' digital technologies
policies. Together, these three chapters provide an outline of the nature of
the research undertaking, and the theories and methods used.
Part Two also has three chapters. These are structured around the temporal
concept important to narrative theory; that of the past, the present and the
future. Chapter Four looks to the past and provides an account of the history
and three traditions, it is argued, impinge upon this research project. In
particular, this chapter discusses what was intended by the phrase 'public
education' in Australia during the 19th and 20th centuries. This chapter
establishes the context for the interpretations of the policies that follow.
Chapter Five seeks to understand and explain the policy narratives of the
present, defined as the research period between 1997 and 2001. This period
of time is thought of as sitting temporally between the past history and
traditions outlined in Chapter Four and the possible scenarios for the future,
proposed in Chapter Six.
Part Three brings the thesis to its conclusion by reflecting on the central
question identified for this thesis: 'what does public schooling mean in
Australia in the 21st century, given its past tradition of free, compulsory and
secular schooling, and given the present policies that are urging the
ubiquitous use of digital technologies?'
10
Shaon, Arif Bin Siraj. "An approach to efficiently curating digital metadata to aid effective long-term data preservation and re-use." Thesis, University of Reading, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507015.
Full textAbstract:
Well managed and good quality metadata plays a vital role in long-term data curation by capturing information necessary for the efficient functioning of different curation operations, such as data preservation and provenance tracking. For data preservation in particular, metadata can be used to record information required to reconstruct or at least understand the reconstruction process for digital resources on future technological platform. However, without curation, metadata itself may deteriorate in terms of its quality and integrity over time. Therefore, a digital curation process needs to incorporate the curation of metadata along with that of data in order to ensure the accurate description of data over the long-term. Unfortunately, no comprehensive method for effective curation of metadata for long periods of time is known to exist at present. Even the Reference Model for Open Archival Information System (OAIS), despite being the most comprehensive and widely adopted framework for long-term data preservation, does not address the requirements of long-term metadata curation in a comprehensive and unambiguous manner. This thesis presents an approach that aims to fill the void for an efficient strategy for curating digital metadata over the long-term. The approach involves the use of a "Metadata Curation Record" and a "Metadata Curation Model". The former is a curarion-aware metadata specification that captures additional statements about both data objects and associated metadata to aid long-term digital curation, while the latter is a specialised version of the "Data Management" module of the OAIS reference model, dedicated to the purpose of long-term metadata curation. The feasibility of the approach is demonstrated by a number of case studies and a web services based prototype system for metadata curation. In addition, this thesis outlines the main requirements of long-term metadata curation and presents an indepth assessment of the current state of play.
11
Chan, Andrew. "The use of low cost virtual reality and digital technology to aid forensic scene interpretation and recording." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/4722.
Full textAbstract:
Crime scenes are often short lived and the opportunities must not be lost in acquiring sufficient information before the scene is disturbed. With the growth in information technology (IT) in many other scientific fields, there are also substantial opportunities for IT in the area of forensic science. The thesis sought to explore means by which IT can assist and benefit the ways that forensic information can be illustrated and elucidated in a logical manner. The central research hypothesis considers that through the utilisation of low cost IT, the visual presentation of information will be of significant benefit to forensic science in particular for the recoding of crime scenes and its presentation in court. The research hypothesis was addressed by first exploring the current crime scene documentation techniques; their strengths and weaknesses, giving indication to the possible niche that technology could occupy within forensic science. The underlying principles of panoramic technology were examined, highlighting its ability to express spatial information efficiently. Through literature review and case studies, the current status of the technology within the forensic community and courtrooms was also explored to gauge its possible acceptance as a forensic tool. This led to the construction of a low cost semi-automated imaging system capable of capturing the necessary images for the formation of a panorama. This provides the ability to pan around; effectively placing the viewer at the crime scene. Evaluation and analysis involving forensic personnel was performed to assess the capabilities and effectiveness of the imaging system as a forensic tool. The imaging system was found to enhance the repertoire of techniques available for crime scene documentation; possessing sufficient capabilities and benefits to warrant its use within the area of forensics, thereby supporting the central hypothesis.
12
Rahrer, Timothy J. (Timothy Joseph) Carleton University Dissertation Engineering Electrical. "A digital signal processing-based hearing prosthesis and implementation of principal components analysis for a tactile aid." Ottawa, 1990.
Find full text
13
Johnson, Earl E. "Realistic Expectations for Speech Recognition with Digital Hearing Aid Devices Providing Acoustic Amplification and Noise Averting Microphones." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/5570.
Full textAbstract:
People with hearing loss (HL) often express a desire for the particular hearing device that will yield the best speech recognition. The problem with fulfilling that desire is that a vast number of hearing devices are available from which to choose. In recent years, medical device regulatory agencies have generally viewed hearing devices (i.e., hearing aids), particularly the hardware and even the software, as substantially equivalent. The purpose of this manuscript is to: 1) Synthesize a number of variables about the person, environment in which hearing occurs, as well as characteristics of the hearing aids that can impact speech recognition. 2) Describe a created tool entitled Realistic Expectations 2 (RE2), which has application to the clinical needs of estimating expected speech recognition with and without hearing aids. RE2 is available as a supplemental file to this manuscript and may be useful for comparing estimates against measures of speech recognition ability in addition to assisting with the explanation of the operation and limitations of hearing aids. When expected speech recognition is achieved, subsequent development of speech and language can continue based on circumstance, cognitive status, and cultural-specific learning, as well as personal and societal betterment efforts like education, rehabilitation, and therapy.
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Chan, A. "The use of low cost virtual reality and digital technology to aid forensic scene interpretation and recording." Thesis, Department of Materials and Applied Science, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/4722.
Full textAbstract:
Crime scenes are often short lived and the opportunities must not be lost in acquiring
sufficient information before the scene is disturbed. With the growth in information
technology (IT) in many other scientific fields, there are also substantial opportunities
for IT in the area of forensic science. The thesis sought to explore means by which IT
can assist and benefit the ways that forensic information can be illustrated and
elucidated in a logical manner. The central research hypothesis considers that through
the utilisation of low cost IT, the visual presentation of information will be of
significant benefit to forensic science in particular for the recoding of crime scenes and
its presentation in court.
The research hypothesis was addressed by first exploring the current crime scene
documentation techniques; their strengths and weaknesses, giving indication to the
possible niche that technology could occupy within forensic science. The underlying
principles of panoramic technology were examined, highlighting its ability to express
spatial information efficiently. Through literature review and case studies, the current
status of the technology within the forensic community and courtrooms was also
explored to gauge its possible acceptance as a forensic tool.
This led to the construction of a low cost semi-automated imaging system capable of
capturing the necessary images for the formation of a panorama. This provides the
ability to pan around; effectively placing the viewer at the crime scene. Evaluation and
analysis involving forensic personnel was performed to assess the capabilities and
effectiveness of the imaging system as a forensic tool. The imaging system was found
to enhance the repertoire of techniques available for crime scene documentation;
possessing sufficient capabilities and benefits to warrant its use within the area of forensics, thereby supporting the central hypothesis.© Cranfield University 2005. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright owner.
15
Jardim, Isabela de Souza. "Mapeamento visível da fala amplificada na verificação do aparelho de amplificação sonora individual digital." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/5/5143/tde-09122009-165944/.
Full textAbstract:
Introdução: Na etapa de verificação da adaptação, o aparelho de amplificação sonora individual vem sendo estudado nos últimos anos por diferentes protocolos e equipamentos, a fim de aumentar a satisfação do usuário. Objetivo: Elaborar um protocolo de verificação de aparelho de amplificação sonora individual utilizando o mapeamento visível da fala amplificada na prática clínica e verificar a satisfação do usuário. Método: Em estudo transversal randomizado duplo-cego, foram avaliados 60 indivíduos adultos separados em dois grupos, sem experiência prévia ao uso do aparelho de amplificação sonora individual modelo retroauricular de tecnologia digital. O Grupo A foi submetido ao Protocolo IIIA, contendo os testes de ganho de inserção, reconhecimento de palavras, mapeamento visível da fala amplificada com verificação sem aconselhamento e os questionários: Client Oriented Scale of Improvement e Satisfaction with amplification in daily life. O Grupo B respondeu ao protocolo IIIB composto por: teste de reconhecimento de palavras, Mapeamento visível da fala amplificada com aconselhamento e os mesmo questionários Client Oriented Scale of Improvement e Satisfaction with amplification in daily life. Resultados: Demonstraram moderada correlação entre o ganho de inserção e o mapeamento visível da fala amplificada. Quando este último registrou os estímulos: suave, médio e forte dentro do campo dinâmico auditivo para 10% de aumento na resposta do teste de reconhecimento de palavras, significou 0,4 a 0,5 pontos de aumento na satisfação do usuário para a situação de silêncio e 0,2 a 0,3 para a situação com ruído competitivo. Conclusões: O protocolo para a verificação do aparelho de amplificação sonora individual elaborado demonstrou ser efetivo para a prática clínica e auxiliar no aumento de satisfação do usuário.Introduction: The hearing aid verification stage has been studied over many years by different protocols and equipments to increase de user satisfaction. Objective: design a hearing aid protocol using Visible Speech Mapping applied to clinical practice in order to analyze the user satisfaction. Method: The cross-sectional, randomized study was done with 60 adults, separated into two groups without prior amplification experience binaurally fitted with digital behind-the-ear hearing aid technology. Four weeks later, the group A answered Protocol IIIA covering insertion gain, Word recognition test, Visible Seech Mapping verification tool without counseling, Client Oriented Scale of Improvement and Satisfation with Amplification in Daily Life questionnaires. The group B was evaluated using the Protocol IIIB containing Word Recognition Test, Visible Speech Mapping verification and counseling tool, Client Oriented Scale of Improvement and Satisfation with Amplification in Daily Life questionnaries. Results: The results showed moderated correlation between insertion gain and Visible Speech Mapping analyzing the procedures when applied to the group A. When Visible Speech Mapping register a soft, medium and strong stimulus within de dynamic range, each 10% improvement at the Word Recognition Test´s result means a 0.4 to 0.5 points, at silence, and 0.2 a 0.3 points increase at speech-in- noise on the satisfaction global score. Conclusions: digital hearing aid verification protocol using Visible Speech Mapping has demonstrated to be effective to the clinical practice.
16
Muirhead, Fiona. "Exploiting sparsity for persistent scatterer detection to aid X-band airborne SAR tomography." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28880.
Full textAbstract:
This thesis evaluates the potential for using line of sight returns and return signals from underneath a forest canopy using X-band, airborne synthetic aperture radar (SAR) tomography. Approximately 30% of the Earth’s land surface is covered by vegetation, therefore global digital elevation models (DEMs) contain a signal from the forest canopy and not the ground. By uncovering new techniques to find the ground signals, using data collected from airborne platforms as verification, such procedures could be applied to currently operational and future X-band, spaceborne systems with the aim of resolving much of the vegetation bias on an international scale. Data from three sources is presented; data collected from Selex ES’s SAR systems, the GOTCHA dataset and simulated data. Before carrying out tomography it is shown that SAR interferometry (InSAR) can successfully be applied to X-band, helicopter data. A scatterer defined as a candidate persistent scatterer (CPS) is introduced, where the pixels are stable and coherent over a matter of days. An algorithm for selecting CPSs is developed by exploiting sparsity and a novel choice of hard thresholding operator. Using simulated forestry and SAR information the effects of changing input parameters on the outcome of the tomographic profile is analysed. What is found in this study is that model simulations demonstrate that ground points can be detected if the platform motion is relatively stable and that temporal decorrelation over the forest volume is kept to a minimal. An understory can confuse the tomographic profile since less line of sight observations can be made. By combining line of sight observations alongside new tomography techniques on high resolution SAR data this thesis shows it is possible to detect ground scatterers, even at X-band.
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Wassberg, Karolina, and Lovisa Suurwee. "Digitala hjälpmedel förpersoner med diabetes : Användarinvolvering i produktutvecklingsprocessen och värdet av ett digitalt hjälpmedel för slutanvändaren." Thesis, KTH, Integrerad produktutveckling, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297931.
Full textAbstract:
Dagens sjukvård blir allt mer digitaliserad, detta innebär att företag inom medicinteknik frekvent konfronteras med förändringar på grund av ny teknik och innovationer. För att hitta nya och kreativa lösningar blir det vanligare att företag väljer att involvera användare i produktutvecklingsprocessen. Den digitala omställningen kan skapa stora möjligheter för personer som använder sig av digitala hjälpmedel för medicinska ändamål i vardagen. Syftet med rapporten är att undersöka hur slutanvändaren kan integreras i produktutvecklingsprocessen av ett digitalt hjälpmedel för personer med diabetes. Avsikten är även att öka förståelsen för användarens upplevelse av ett digitalt hjälpmedel samt dess påverkan på den psykiska och fysiska hälsan.Arbetet inleddes med att skapa en teoretisk grund genom en litteraturstudie. Detta gjordes för att fåkunskap om produktutveckling, användarinvolvering, diabetes samt den koppling psykisk ohälsa hartill diabetes. Därefter genomfördes sju semistrukturerade intervjuer. Två respondenter från två olika företag intervjuades, ena utvecklar ett digitalt hjälpmedel och det andra har tillverkat ett som finns tillgängligt på marknaden. En person från en diabetesförening intervjuades, fyra personer med diabetes samt en överläkare med specialistutbildning inom diabetes. Baserat på intervjuerna identifierades teman som resultatet är utformat efter; produktutveckling, användarinvolvering, psykisk ohälsa samt fördelar respektive utmaningar med ett digitalt hjälpmedel. Resultatet analyserades och jämfördes mot teorin, därefter kunde slutsatser kring respektive tema dras. En slutsats gällande användarinvolvering är att båda företagen anser att det finns fler för- än nackdelar. Företagen har valt att involvera användare i olika stadier under produktutvecklingsprocessen, i olika syften och grad. Kontakten med användare fås med hjälp av kontaktnät, digitala plattformar samt direkt feedback på produkten väl ute på marknaden. Studien påvisar även att ett digital hjälpmedel gett möjlighet att undvika stora förändringar i blodsockernivåer eftersom metoderna är allt mer självstyrande. De digitala hjälpmedel som berörts i studien har många positiva effekter där den främsta är frihetskänslan. Prestationen vid fysisk aktivitet påverkas av varierande nivåer och detta kan undvikas till viss grad med ett mer utvecklat hjälpmedel. Den psykiska hälsan stöds även med ett digitalt hjälpmedel då personer med diabetes inte konstant behöver tänka på sina blodsockernivåer, vilket underlättar vardagen.Today's healthcare is becoming increasingly digital, indicating that companies in medical technology are frequently confronted with changes due to new technology and innovations. To find new and creative solutions, it is becoming increasingly common for companies to choose to involve users in the product development process. The digital transition can create great opportunities for people who use digital aids for medical purposes. The purpose of the report is to investigate how the end user can be integrated into the product development process of a digital aid for diabetics. The intention is also to increase the understanding of the user's experience of a digital treatment method and its impact on mental and physical health. The work began with creating a theoretical basis through a literature study. This was done to gain knowledge about product development, user involvement, diabetes, and the connection mental illness has to diabetes. Then seven semi-structured interviews were conducted. Two respondents from two different companies were interviewed, one is developing a digital aid and the other had manufacture done that is available on the market. One person from a diabetes association was interviewed, four people with diabetes and a senior consultant physician who is a specialist in diabetes. Based on the interviews, themes were identified according to which the results are designed; product development, user involvement, mental illness and the benefits and challenges of a digital aid. The results were analyzed and compared against the theory, after which conclusions could be drawn about each theme. Conclusions regarding user involvement is that both companies believe that there are more advantages than disadvantages. The companies have chosen to involve users at different stages during the product development process, for different purposes and degrees. The contact with users is obtained with the help of their social network, digital platforms and direct feedback on the product when it’s on the market. The study also shows that a digital aid has made it possible to avoid large changes in blood sugar levels because the methods are increasingly automatic. Digital aids have many positive effects, the most important one is the feeling of freedom. Performance in physical activity is affected by varying levels and this can be avoided to some extent with a more developed aid. Mental health is also supported with a digital aid as people with diabetes don’t have to constantly think about their blood sugar levels, which makes everyday life easier.
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Fontoura, Kleber Lopes. "Análise, projeto e implementação de reatores eletrônicos para acionamento de lâmpadas de alta intensidade em descarga "AID", controlados por circuitos de lógica reconfigurável "FPGA"." Universidade Federal de Uberlândia, 2007. https://repositorio.ufu.br/handle/123456789/14363.
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Conselho Nacional de Desenvolvimento Científico e TecnológicoProgrammable logic devices were introduced about fifteen years ago and nowadays they are used in areas like Telecommunications, Instrumentation and more recently Power Electronics. This work presents the application of an FPGA device in the control of a ballast circuit for driving high intensity discharge lamps. The electronic ballast presents improvements regarding the previous electromagnetic reactors, due to their small size and weight and also because they guarantee a longer life time for the lamps. In order to test and verify the proposed control strategy, a prototype was built to drive 70W,150W and 250W metal halide and high pressure sodium lamps. Beyond the vantages above mentioned, the prototype also presented a notable reduction in the time needed for the lamp to achieve maximum brightness, in comparison to magnetic reactors.
Os dispositivos lógicos programáveis surgiram há cerca de quinze anos e hoje são utilizados em áreas como Telecomunicações, Instrumentação e mais recentemente em Eletrônica de Potência. Este trabalho apresenta a aplicação de um dispositivo FPGA no controle de um circuito ballast eletrônico para acionamento de lâmpadas de alta intensidade de descarga (AID). Os reatores eletrônicos apresentam sensíveis melhorias com relação aos reatores eletromagnéticos por apresentarem menor peso e volume e também por garantirem uma maior vida útil às lâmpadas. Para testar e verificar a estratégia de controle proposta, dois protótipos foram construídos para alimentar lâmpadas AID de vapor de sódio e de vapor metálico de 70W, 150W e 250W. Além das vantagens citadas anteriormente, entre os resultados apresentados pelo protótipo destaca-se a notável redução no tempo para se atingir o brilho máximo da lâmpada com relação aos reatores magnéticos.
Doutor em Ciências
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Penteado, Silvio Pires. "Desenvolvimento de prótese auditiva retroauricular, digital e de especificações mínimas." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/5/5143/tde-09122009-174207/.
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A International Federation of Oto-Rhino-Laryngological Societes (IFOS) estima que cerca de 10% da população americana seja portadora de algum tipo de perda auditiva. O Better Hearing Institute afirma que nos Estados Unidos cerca de 31 milhões de pessoas apresentam algum tipo de perda auditiva, ou cerca de 10% de sua população. Muitas são as causas que contribuem para o aumento do contingente de deficientes auditivos, dentre os quais a presbiacusia, as doenças hereditárias, doenças metabólicas, uso de drogas ototóxicas, traumas acústicos, excesso de ruído, neoplasias, infecções e danos vasculares e causas idiopáticas. Dentre os efeitos perniciosos da perda auditiva estão a frustração, insegurança, paranóia, tensão, nervosismo, irritabilidade, instabilidade, medo, sensação de inferioridade, sensação de confusão, descontentamento, fobia social e depressão. Crianças com perdas auditivas unilaterais tendem a apresentar baixos níveis de aproveitamentos escolares, a demandar por técnicas especiais de linguagem por conta dos efeitos permanentes da incapacidade de cognição, mesmo quando se tratava de perdas auditivas leves. Pelo prisma da audiologia clínica todo portador de deficiência auditiva pode ser considerado um candidato ao uso de prótese auditiva - ou aparelho auditivo - um dispositivo eletrônico cujos componentes principais - processador digital de sinais, microfone e receptor - podem ser adquiridos da cadeia de suprimentos que abastecem os fabricantes internacionais que dominam o mercado mundial. Estes fabricantes procuram ofertar produtos com uma maior densidade de recursos tecnológicos que os seus concorrentes em paga de lucros maiores, a oferecer mais que os clientes necessitam ou estão dispostos a pagar. Estas organizações internacionais trazem produtos cujos preços finais são incompatíveis para os cidadãos de países em desenvolvimento. Um dos objetivos deste estudo é o de entender o modelo de negócios praticado pela indústria de próteses auditivas, notavelmente a prática de varejo, a mais lucrativa. O outro objetivo é o de desenvolver uma prótese auditiva no desenho retroauricular, digital e de especificações mínimas, que possa competir com aquelas fornecidas por organizações lv internacionais para a condução das políticas públicas, segundo a Portaria 587, Anexo IV do Ministério da Saúde. Foi contatada a cadeia de suprimentos destas organizações, solicitadas amostras diversas e montados protótipos funcionais, que depois de vários ensaios permitiram a definição de uma arquitetura eletroeletrônica básica. Esta arquitetura foi novamente ensaiada, tendo como resultado um configuração eletroeletrônica final, a qual definiu uma prótese no desenho retroauricular. De modo a definir os recursos tecnológicos e as especificações eletroacústicas do produto final para o atendimento das especificações do Ministério da Saúde, foram utilizadas as ferramentas de engenharia do fabricante do componente principal (processador digital de sinais), que incluíam o desenvolvimento com base no servidor do fabricante (online), desenvolvimento com auxílio de programas específicos (stand alone), montagem eletroeletrônica e mecânica para finalmente certificar o produto final com a mesma norma internacional das próteses auditivas comercializadas no mercado nacional. Foi possível entender o modelo de negócios praticado na indústria de próteses auditivas com a identificação dos principais atores e como se relacionam. A única prótese auditiva desenvolvida no desenho retroauricular atende a todos os requisitos de Tecnologia A e B, o que corresponde a 85% da demanda das aquisições do Governo Federal.The International Federation of Oto-Rhino-Laryngological Societies (IFOS) estimates as 10% the total amount of hearing impaired in United States. The Better Hearing Institute asserts that in United States about 31 million people have hearing losses in some degree, say around 10% of total population. Increasing the amount of hearing-impaired there is a list of causes as presbyacusis, hereditary diseases, metabolic diseases, use of ototoxic drugs, acoustic trauma, noise-induced, neoplasia, infections and vascular damages and idiopathic causes. Amongst of perverse effects of hearing losses are frustration, insecurity, paranoia, tension, nervousness, irritability, instability, fearful, sense of inferiority, sense of confusion, discontentment, social phobia and depression. Children with unilateral hearing loss appear to show high grade failures, demands for additional assistance due to permanent effects of cognition inability, even so when they are affected by mild hearing losses. By means of Audiology perspective all hearing impaired are normal applicant to wear a hearing aid, an electronic device whose chief components - digital signal processing, microphone and receiver - can be acquired from the international manufacturers supply chain, whose rule the world market. These manufacturers push products to market with higher density of technological resources than their competitors in exchange of higher profits, to offer more than the customers need or are willing to pay for. Those international organizations bring products which end prices are unmatched to citizen in the developing countries. One of the objectives of the present study is to understand the business model these organizations run, mainly the most profitable one: retail business. The other objective means the developing the digital behind-the-ear hearing aid with minimal specifications, to compete with those hearing aids, same design, supplied by these organizations to the Brazilian Government for its open tender, according to Government directive 587, section sign IV of Health Minister. It was contacted these organizations supply chain, requested samples and assembled some functional prototypes, whose after some experiments lead us to determine a basic electroelectronic architecture. This architecture was submitted to more experiments until final lvii electroelectronic architecture was determined and it was rested inside a behind-the-ear case. To determine end product technological resources and the electroacoustic specifications to fulfill Health Minister specifications it was managed engineering tools of the main component (digital signal processing), which entails being logon on the manufacturer server, also stand alone on a personal computer, to assemble the electro-electronic and mechanical modules to submit the end product to the same international standard the hearing aids already traded in the Brazilian market place. It was possible the understanding the current business model also to identify the main actors and how they interact each other. The only digital behind-the-ear hearing aid developed complies with all requirements labeled as Technology A and B, respective of 85% of all Brazilian Government acquisitions.
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Carvalho, Dionísio de. "Estudo e desenvolvimento de blocos para processamento hardwired em aparelhos de auxílio auditivo com DSP." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18155/tde-17012014-091429/.
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A vida de milhões de pessoas é afetada por problemas de deficiência auditiva, incapacitando-as de ouvirem os sons naturalmente. O uso de aparelhos de auxílio auditivo minimiza o efeito das deficiências, pois possibilita tratamento dos sinais auditivos através de sofisticados algoritmos que eliminam ruídos e amplificam os sinais de interesse. Este trabalho propõem a especificação de um sistema integrado, otimizado em termos de consumo de potência, para realizar o processamento de sinais digitais em aparelhos de auxílio auditivo digital. Foram desenvolvidos dois blocos para processamento hardwired, que substituem o processamento realizado por software, cuja finalidade é filtrar os sinais sonoros digitalizados com menor consumo. Um dos blocos, um filtro FIR de até 128 coeficientes, pode ser utilizado como filtro do tipo passa baixa ou passa altas frequências. O outro bloco, para executar o algoritmo ALE, é utilizado para eliminar ruídos periódicos. Os blocos desenvolvidos e implementados foram compilados e simulados para comprovar a funcionalidade. Os resultados das simulações mostraram que eles atendem as especificações de funcionalidade. Os blocos foram também sintetizados em uma tecnologia CMOS de 0,35 μm, três níveis de metal, para assim se ter as estimativas de área do circuito e de consumo de potência. A área do layout final foi de 14 mm². O consumo de potência estimado é de 0,30 mW para frequência de clock de 300 kHz (o que permite que um filtro FIR processe uma amostra a cada 240 μs, no pior caso, e o ALE, uma a cada 36 μs), e de 5,06 mW para frequência de clock de 5,0 MHz (filtro FIR processa uma amostra a cada 14,4 μs e o ALE, uma a cada 2,2 μs). As estimativas de consumo foram feitas considerando os dois blocos operando simultaneamente e com tensão de alimentação de 1,8 V. Para todo o sistema integrado proposto, obtive-se, com um cenário específico, o consumo de potência de 1,1 mW, considerando dois Filtros Configuráveis, um Filtro ALE e um DSP.The live of millions of people are affected by hearing problems, disabling them from hearing the sounds naturally. The use of hearing aids devices minimizes the effect of deficiencies, since it allows processing of auditory signals through sophisticated algorithms that eliminate noise and amplify the signals of interest. This work proposes the specification of an integrated system, optimized in terms of power consumption, to perform digital signal processing in digital hearing aid devices. Were developed two blocks of hardwired processing, replacing software processing, whose purposes are to filter the digitized audio signals with lower consumption. One of the blocks, an FIR filter up to 128 coefficients can be used as a low pass or high pass filter. The other block, to run the ALE algorithm, is used to eliminate periodic noises. The blocks developed and implemented were compiled and simulated to demonstrate their functionality. The simulation results show that they meet the specifications of functionality. The blocks were also synthesized in a 0.35 μm CMOS technolog, three metal levels, in order to have estimatives of circuit area and power consumption. The area of the final layout was 14,0 mm². The estimated power consumption is 0.30 mW for clock frequency of 300 kHz (which allows a FIR filter to process one sample every 240 μs in the worst case, and ALE, one every 36 μs), and 5.06 mW for clock frequency of 5.0 MHz (FIR filter processing one sample every 14.4 μs, and ALE, one every 2.2 μs). Consumption estimates were made considering the two blocks operating simultaneously and supply voltage of 1.8 V. For all the proposed integrated system, it was found, for a specific scenario, the power consumption of 1.1 mW, considering two configurable filters, one filter ALE and one DSP.
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Reyneke, Michelle. "A comparison of two non-linear prescriptive methods used with digital hearing instrument fittings in children." Diss., Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-02112005-091556.
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AlAbabneh, Ali. "Humanitarian Aid and Exploring Efficiency of Service Delivery in the Age of Communication and Technology: Jordan as a case study." Thesis, Malmö universitet, Fakulteten för kultur och samhälle (KS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-23625.
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Information and communication technologies (ICT) are becoming a growing form of designing and implementing humanitarian response in emergency and post conflict areas. This research explores the role ICTs play in the new era of emerging humanitarian spaces, focusing on two main UN agencies, the United Nations High Commissioner for Refugees (UNHCR) and the United Nations International Children’s Fund (UNICEF), that cover a wide range of services in Jordan. This master thesis investigates the different interventions of these two organizations in response to the Syrian refugee crisis in Jordan, asking how ICTs contributed to the efficiency of their service delivery. This study also analyses the changes ICTs brought to UNHCR’s and UNICEF’s humanitarian response in Jordan by comparing the nature of response before and after the integration of ICTs in the different programs. By examining the existing literature related to the use of ICT in humanitarian response combined with fieldwork conducting key informant interviews with UNHCR and UNICEF staff in the field of innovation and ICT, this master thesis aims to provide a critical perspective on the digital development discourse. This study argues that ICT has helped to increase the efficiency of humanitarian services delivery by decreasing the overall cost of interventions and decreasing the time needed to respond to the beneficiaries needs, leading to increase beneficiaries’ satisfaction.
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Pereira, Leonor Isabel Lino da Silva. "Análise de imagens digitais de lâminas delgadas para interpretação e validação dos valores de FZI em reservatórios petrolíferos." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/10120.
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Dissertação para obtenção do Grau de Mestre em Engenharia Geológica (Georrecursos)A presente tese tem como objectivo testar o potencial da análise de imagens digitais de fotomicrografias a cores de lâminas delgadas na interpretação e validação dos valores do parâmetro empírico Flow Zone Indicator (FZI) ou indicador zonal de fluxo. Para o estudo foram utilizadas 13 amostras de rochas de um reservatório siliciclástico com dados de ensaios de laboratório em plugs (porosidade e permeabilidade) e fotografias de lâminas delgadas. Com a permeabilidade e a porosidade dos ensaios foi calculado o FZI para cada amostra. O FZI atribui características hidráulicas às unidades geológicas com base na permeabilidade e porosidade, que são propriedades petrofísicas das rochas que quantificam a passagem e armazenamento de fluidos. Seguidamente, e por análise de imagens digitais num algoritmo automático em MATLAB®, cada imagem da lâmina delgada foi separada em quatro componentes ou camadas de informação que somados constituem a imagem original: i) poros; ii) grãos, iii) intercrescimentos; iv) matriz deposicional. No final desta etapa, os resultados obtidos com as componentes foram comparados qualitativamente com os valores de FZI calculados com os dados de laboratório, tendo-se tentado arranjar explicações para algumas divergências. Seguidamente, aplicou-se uma lei de regressão entre a porosidade e a permeabilidade obtidas dos plugs. Os melhores resultados foram obtidos com uma função exponencial. Os resultados obtidos com a análise de imagens em percentagens de área por amostra (poros, grãos, intercrescimentos e matriz deposicional) foram combinados para se obter uma estimativa da porosidade efectiva calculada unicamente a partir da imagem. Em seguida, e como não foi possível estimar a permeabilidade a partir das imagens, estimou-se a permeabilidade por regressão com os valores de porosidade obtidos no MATLAB®. Com o par porosidade MATLAB® e a permeabilidade obtida por regressão recalculou-se o parâmetro FZI. No final faz-se a comparação das duas estimativas de FZI e sugerem-se novas vias para a exploração do problema para que se possa tentar encontrar uma nova proposta para o cálculo do FZI unicamente por análise de imagem.
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Coelho, Talita Salles. "Implementação de algoritmos computacionais para interpretação de imagens dermatoscópicas para diagnóstico de tumores de pele." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/85/85133/tde-28012019-084648/.
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O câncer de pele é a neoplasia maligna mais incidente, no Brasil correspondendo a aproximadamente 29% de todos os tumores diagnosticados. O melanoma maligno é sua apresentação menos frequente, com cerca de 1% de todos os diagnósticos, porém com maior índice de mortalidade, comparado com outros tumores não melanomas. O fato de o melanoma ser considerado um tipo de câncer muito agressivo e não ser radiossensível, um diagnóstico precoce garante um alto índice de sobrevida ao paciente. O método mais utilizado para a análise de melanomas é a regra do ABCD, que consiste em extrair características de: assimetria, borda, coloração e diâmetro das lesões, a fim de diferenciá-las das demais lesões de pele. A dermatoscopia é uma técnica não invasiva, que permite fazer o reconhecimento das estruturas superficiais da pele com uma ampliação de até 400x, o que facilita a análise das lesões. A contribuição deste presente trabalho consiste na análise de lesões associada à técnica de processamento de imagem digital, com o objetivo de fornecer uma ferramenta de auxílio ao médico, dando um amparo no momento de se fornecer um diagnóstico ao paciente. O software desenvolvido neste trabalho utiliza imagens dermatoscópicas de lesões de pele associado à regra do ABCD, fornecendo por meio da análise destas características, um diagnóstico, se a lesão é melanoma ou não melanoma.Skin cancer is the most frequent malignant tumor in Brazil representing approximately 29% of all diagnosed tumors. Malignant melanoma is the least common presentation, with about 1% of all diagnoses, but with higher mortality rate compared to other non-melanoma tumors. Early diagnosis ensures a high patient survival rate. The most used method for the analysis of these lesions is the ABCD rule, where features such as asymmetry, border, color and diameter of lesions are extracted. Dermatoscopy is a noninvasive technique that allows the recognition of skin structure with a magnification of up 400x. A good diagnosis is associated with the degree of subjectivity of the operator doctor. The contribution of this present work consists in the analysis of lesions associated with digital image processing technique, with the goal of provide a support tool to doctor, giving one support in time to give a diagnosis to the patient. The software developed here with dermatoscopic images of skin lesions associated with ABCD rule, giving a diagnosis, by the analysis of the lesion characteristics, indicating if the lesion is melanoma or no melanoma.
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Linder, Tilda, and Maja Pavlovic. ""Man kan inte erbjuda praktiskt stöd som en kopp kaffe om klienten är ledsen" : - En kvalitativ studie om det digitala mötets betydelse inom ekonomiskt bistånd." Thesis, Linnéuniversitetet, Institutionen för socialt arbete (SA), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-100701.
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Traditionally, meetings between social workers and clients have taken place physically. Since the 2010s, there has been a digital development which has meant that more calls between social workers and clients take place digitally, for example via telephone, Skype or mobile applications. In the spring of 2020, Sweden’s social services faced a drastic change due to covid-19 caused by the coronavirus SARS-CoV-2. In order to reduce the spread of infection, more and more meetings within the social services have had to take place digitally. This study aimed to investigate the impact and significance of digitalisation, in the form of the digital meeting, in the interaction and meeting between social welfare secretaries and clients in economic aid, viewed from the social welfare secretaries’ perspective.The empirical material has been collected through qualitative interviews with eight social welfare secretaries active within economic aid. With the intention of analyzing the empirical data a theoretical framework has been used, consisting of Goffman's theory of social interaction and new institutional organization theory.The result indicates that there are difficulties in establishing new, but also maintaining existing, relationships with clients when meetings become digital. The interaction between the parties is affected when the physical meeting is absent, especially if the parties cannot see each other. Apart from digital maturity, the digital meeting does not seem to require any other proficiency. The social welfare secretaries continue to describe that the proficiencies they already possess such as sensitivity, compassion and professionalism become more difficult to maintain in digital meetings. At the same time, the results show that digital meetings also have positive effects. It is mainly emphasized that digital meetings are more efficient and accessible than physical meetings. Furthermore, the impact and significance of the digital meeting is also affected by the client’s different conditions.
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Eskilsson, Björn, and Åsa Andersson. "Visuellt stöd som stöttning för elever i språklig sårbarhet. : En enkätstudie om lärares användning på lågstadiet." Thesis, Umeå universitet, Institutionen för språkstudier, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-178747.
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The purpose of the study was to investigate teachers’ use of visual aid within the subject Swedish in schools and with a specific focus on their work with pupils in language vulnerability. We conducted a questionnaire study with 39 teachers who teach Swedish in primary school. Our questions were how and to what extent teachers in primary school describe that they use visual aid and in which teaching situations teachers describe that they use visual aid to make teaching accessible to pupils in language vulnerability. We have also investigated how teachers describe that visual aid has an impact on making teaching accessible to pupils in language vulnerability. Our last question was whether teachers had received training in using visual aid and whether they described a need for further training. Our results show that teachers use visual aid to a large extent, but in very varied ways. The most frequently used aid is structural aid, while strategy aid and communication aid are used to a lesser extent. Moreover, the teachers report that the visual support facilitates learning for pupils in language vulnerability. Most of them also state that they received training in the subject, but that they would need further training to support pupils to a higher degree. In conclusion, this study shows that although Swedish teachers are aware of the fact that visual aid helps pupils in language vulnerability to reach higher goal fulfilment, their use of visual aids is highly diverse.
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Sundkvist, Christine. "Digital marknadskommunikation : ur ett konsumentperspektiv." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10143.
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Användningen av digitala medier ökar konstant. Onlinekulturen har kommit att bli en naturlig del av vardagen och konsumenter är dagligen aktiva på diverse sociala medier där de utbyter information och kommunicerar med andra individer. Digitala medier är även plattformar där konsumenter interagerar med modemärken. Den digitala marknadskommunikationen har kommit att bli en självklar del av ett företags marknadsföringsstrategier, inte bara i varumärkesbyggande syfte utan även exempelvis för att fungera som trafikdrivande till företagets onlinebutik. En förståelse för konsumenten är väsentlig för att framgångsrikt nå ut via dessa kanaler. Tidigare forskning visar dock på ett gap i forskningen om konsumentens upplevelser och mottagande av den digitala marknadskommunikationen, vilket indikerar på ett behov av fortsatt forskning. Syftet med denna studie är att undersöka digital marknadskommunikation ur ett konsumentperspektiv. Studien ämnar få en förståelse för konsumentens mottagande av svenska modemärkens digitala kommunikation och vad som stimulerar konsumenten till att klicka sig vidare till modemärkets onlinebutik. Studien avgränsas till nyhetsbrev och Instagram, vilka är två vanligt förekommande digitala kanaler. Nio semistrukturerade intervjuer genomfördes med kvinnliga respondenter i åldrarna 25-30 år. Instagrambilder och nyhetsbrev inkluderades i intervjun från Totême, Rodebjer och Filippa K. Studien bygger på AIDA modellen som beskriver konsumentens steg i mottagandet av marknadskommunikation. Studiens resultat visar att konsumentens uppmärksamhet på digitala medier är svårfångad. Det existerar ett överflöd av digital marknadskommunikation, vilket gör konsumenten selektiv och kräsen. Konsumenten stimuleras av inspirerande bilder och en visuellt tilltalande helhet samt vill mottagaren kunna identifiera sig med det som kommuniceras. För att meddelandet inte ska stanna vid inspiration och framgångsrikt påverka konsumenten till att klicka sig vidare till onlinebutiken behöver konsumenten guidas av modemärket på ett enkelt och tydligt sätt. Konsumenten är bekväm och den digitala marknadskommunikationen får inte upplevas tidskrävande. Lyckas modemärket stimulera konsumenten visar studien att konsumenten är positivt inställd och mer frekvent besöker onlinebutiken.The usage of digital media is constantly increasing. The online culture has become a part of our daily lives and consumers frequently engage in social media practices such as communicating with other individuals and sharing information. Digital media channels are also a way for consumers to interact and communicate with fashion brands. Digital marketing communication has become a natural part of a firm’s marketing strategies and communicating through digital channels offers advantages not only from a brand-building perspective but also drives traffic to the online store. An understanding of the consumer is essential to successfully reach out to the consumer in the digital sphere. Existing research is though limited within this field and further research concerning consumer perception of digital marketing communication is demanded. The study aims to examine digital marketing communication from a consumer perspective. The purpose is to get a deeper understanding of the consumer’s perception of digital marketing communication within the context of Swedish fashion brands. The study addresses consumer motivations and aspects that drive the consumer to visit the online store. The study is restricted to two widely used digital channels, newsletter and Instagram, and was conducted by nine semi-structured interviews with females between the age of 25-30. The interviews involved newsletters and Instagram pictures by Totême, Rodebjer and Filippa K. The study is based on the AIDA model, which describes stages that occur when a consumer receives marketing communication. Findings show that it is hard to catch the consumer’s attention. It exists an overload of information and fashion brands in the digital sphere bombard consumers with messages. The outcome is a “picky” consumer. The consumer demands inspiring and visually appealing pictures and content they can relate to and identify themselves with. Furthermore, the findings show that the fashion brand has to guide the consumer to an action. It is essential that the fashion brand communicate a message that is permeated by ease and simplicity. The consumer is a comfy individual and the digital marketing messages will not get the consumer to visit the online store if it feels time consuming. Lastly, the result shows that the consumer has a positive attitude and more frequently visits the online store when the fashion brand successfully reaches out and stimulates the consumer. This thesis is written in Swedish.
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Olson, J. A. "Digital imaging, leucocytes, gamma-linolenic acid and diabetic retinopathy." Thesis, University of Aberdeen, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.593242.
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The work for this thesis has been carried out in the Diabetic Clinic, Woolmanhill, the Eye Clinic, Foresterhill and the Departments of Bio-Medical Physics and Ophthalmology, University of Aberdeen. One hundred and twenty two patients with type 1 diabetes mellitus were recruited from the Diabetic Clinic, Woolmanhill, and attended a Research Clinic at the Eye Clinic, Foresterhill, on a three monthly basis for two years each between 1992 and 1995. Data was extensively collated relating to diabetic control and diabetic complications. Concentrations and activities of several serum factors were studied in an attempt to elucidate pathogenetic mechanisms in diabetic retinopathy. Serum levels of soluble leucocyte endothelial adhesion molecules were measured to see if there is indirect evidence for increase leucocyte adhesion in diabetic retinopathy. Similar studies were also performed looking at serum induced retinal endothelial capillary cell migration, a putative early feature in the development of sight-threatening new vessel formation. Computer image analysis methods, developed in the Department of Bio-Medical Physics, were modified and evaluated, leading to robust techniques suitable for quantifying lesions of diabetic retinopathy in large numbers of unselected fundal photographs and fluorescein angiograms. This latter work was completed in 1997. As it is known that essential fatty acid metabolism in diabetes is abnormal, leading to low levels of gamma-linolenic acid and its metabolites, the above techniques were used to assess the progress of diabetic retinopathy in a two year crossover trial of dietary gamma-linolenic acid supplementation.
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Schmitt, Jan, Benoit Decreton, and Phillip C. Nell. "How corporate headquarters add value in the digital age." Organizational Design Community, 2019. http://dx.doi.org/10.1186/s41469-019-0049-6.
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How will digitalization influence the role of corporate headquarters (CHQs) and their relationships with their operating units? We recently asked 67 senior CHQ managers this question. The results suggest that CHQs expect to become more powerful and more involved in their operating units. These conclusions seem to be driven by perceptions that the ongoing digitalization will provide CHQ managers with more timely and better information. In this "Point of View", we discuss the potential pitfalls of such a narrative. We also offer ideas for how to avoid mistakes and ensure that CHQs increase their value-added in times of digitalization. In particular, we suggest that CHQs place emphasis on social interactions for data to be effectively collected and analyzed, for decision-making power to be adequately allocated, and for CHQ involvement to be informed and necessary.
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SUMME, LORI ANN. "Noise Reduction in Digital Hearing Aids Using Environmental Sounds." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1052327314.
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Barbro, Patrick A. "Content and Context: Consumer Interactions with Digital Decision Aids." Diss., Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/332469.
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Business Administration/MarketingPh.D.
Through four essays, this dissertation contributes to the body of marketing literature by advancing understanding of consumer interactions with digital decision aids. Different aspects of the content contained within digital decision aids are explored in several contexts. First, the drivers of consumer interactivity in an online review community are examined and it is found that violations of community norms are an important factor in stimulating consumer action. Second, a tool is developed to facilitate the normalization of online review content across languages. Next, elements of language and national culture are investigated to determine their influence on consumer reviews in an international context. It is found that cultural biases play an important role in the relative verbosity, valence, and helpfulness of online reviews across countries. Lastly, the role of images in digital decision aids is considered and it is found that image type and perspective can influence consumer product evaluation. In sum, the influence that content and context have on consumer interactions with digital decision aids is clearly demonstrated through a diverse yet intertwined set of studies.
Temple University--Theses
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Olsson, Sandra. "Digitala läromedel och återkoppling i matematik för årskurs 1-3. : Lärares möjlighet till återkoppling med digitala läromedel." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84694.
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Digital teaching materials are today considered an important complement in the teaching of mathematics in today's school. As our society becomes increasingly digital, it is even more important that the school adapts and develops its knowledge in digital curricula. That teachers then have knowledge of how these teaching aids are structured and work is now even more important, partly so they know which teaching aid is most effective both for the student's knowledge and development and as an aid to the teacher's ability to assess. In this work, a qualitative content analysis of five digital teaching materials in mathematics has been done. The purpose of the content analysis was to see which digital teaching materials have feedback as part of their offer and whether the teacher has the opportunity to provide feedback to the students in the digital teaching materials in mathematics for grades 1-3. All the digital teaching materials have been analyzed based on the student's and teacher's insight into the teaching materials, this was done with the help of an analysis schedule. The results have then been set against different levels of feedback to conclude that all five digital teaching aids have feedback at the task level as an important aspect. Furthermore, the analysis showed that there are three "types" of e-textbooks. One of the digital teaching materials examined belonged to one "type" of e-textbook while the other four belonged to one and the same. Finally, it could be stated that all five digital teaching aids have some shortcomings when it comes to feedback.Digitala läromedel anses idag vara ett viktigt komplement i undervisningen inom matematik i dagens skola. Då vårt samhälle blir allt mer digitaliserat är det ännu viktigare att skolan anpassar sig och utvecklar sina kunskaper inom digitala verktyg. Att lärare då har kunskap om hur dessa läromedel är uppbyggda och fungerar är nu ännu viktigare, dels för att de ska veta vilket läromedel som är mest effektivt både före elevens kunskapsutveckling och som hjälpmedel för lärarens möjlighet till bedömning. I detta arbete har en kvalitativ innehållsanalys av fem digitala läromedel inom matematik gjorts. Syftet med innehållsanalysen var att se vilka digitala läromedel som har återkoppling som en del av sitt utbud samt om läraren har möjlighet till att ge återkoppling till eleverna via de digitala läromedlen i matematik för år 1–3. Alla de digitala läromedlen har analyserats utifrån elevens och lärarens insyn i dem, detta gjordes med hjälp av ett analysschema. Resultatet har sedan ställts emot olika nivåer av återkoppling för att komma fram till att alla de fem digitala läromedlen har återkoppling på uppgiftsnivå som en viktig aspekt. Vidare visade analysen att det finns tre ”typer” av e-läroböcker, det vill säga digitala läromedel. Ett av dem som undersöktes tillhörde en ”typ” av e-lärobok medan de andra fyra tillhörde ett annat digitalt läromedel. Slutligen kunde det konstateras att alla de digitala läromedel som undersöktes har några brister när det kommer till återkoppling.
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Shusina, Ngwa Abinwi. "Unbiased adaptive feedback cancellation in hearing aids." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274703.
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Charif, Khalifi Moulay Hassan. "Étude et réalisation d'un module d'acquisition et de traitement d'images destiné à la maintenance assistée par ordinateur d'équipements électroniques." Nancy 1, 1988. http://www.theses.fr/1988NAN10257.
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Les outils proposés sont batis autour d'un système expert de diagnostics de pannes et d'aide à la réparation, complèté par une base de données comportant une schématique complète des équipements du centre d'émission ainsi que des images réelles de ces équipements
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Schulz, Martin [Verfasser], and Felix von [Akademischer Betreuer] Stetten. "Microfluidic system integration for droplet based digital nucleic acid testing." Freiburg : Universität, 2020. http://d-nb.info/1229349278/34.
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Canagarajah, Cedric Nishanthan. "Digital signal processing techniques for speech enhancement in hearing aids." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260433.
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De, Ridder Ryan (Ryan James). "Business strategy of nucleic acid memory for digital information storage." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/110132.
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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, School of Engineering, System Design and Management Program, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 62-67).
Nucleic acid memory (NAM) is the storage of digital data by encoding the information into the medium of nucleic acids. This is often called DNA storage, as typically, but not necessarily, the information is stored in the nucleobases that comprise DNA. Baum first introduced this idea in 1995, but it wasn't until 2012 that Church proved the idea on a larger scale. NAM has a number of features that make it very promising as a data storage medium. The three typically highlighted are capacity density, data retention (i.e., durability), and energy usage. NAM should enter the data storage market, as a hardware product, through the ~$4.5B archiving market, by targeting large storage service providers and large data-intensive corporations with on-premise operations. A NAM product has the potential to reduce the capital and operational cost base of these companies, by millions of dollars per year. An architecture strategy should be employed to enter the market, relying on control over underlying ideas and partnerships to barricade the company from competition. NAM is a decade away from commercialization, making this a very risky early stage venture. The costs need to come down at least 100,000-fold before the technology is cost competitive with current solutions. Additionally, there are a number of scientific and engineering issues that need to be carefully resolved. Due to the risks, the only viable funding source is government grants. If early stage funding were secured, IP should be developed in the core NAM technology of storage and access and an interim revenue source established. This would allow the company a strong chance to thrive in the competitive storage industry, if and when NAM becomes cost competitive.
by Ryan de Ridder.
S.M. in Engineering and Management
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Aguayo, Ivan 1978. "Evaluation of different forms of compression in digital hearing aids." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8941.
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Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.Includes bibliographical references (leaves 90-91).
People with cochlear hearing loss have a reduced dynamic range of hearing, thus amplitude compression may provide adequate amplification of soft sounds without uncomfortable over-amplification of loud sounds caused by conventional linear amplification. Although compression is conceptually straightforward, there are various design parameters that may affect the intelligibility of speech, the quality of sounds, and the perception of background noise. Four combinations of the Dual Front-End automatic gain control (AGC) system were implemented: (1) The Dual Front-End with a Hold Timer developed in Stone et al. [8], which aimed at reducing pumping effects while maintaining a relatively fast release; (2) The Dual Front-End with the SNR Estimator, investigated by Martin et al. [4], designed to provide a varying release time constant depending on the SNR level; (3) The Dual Front-End with both the Hold Timer and the SNR Estimator; (4) The Dual Front-End by itself, without the Hold Timer or the SNR Estimator. A fifth system, composed of linear amplification and compression limiting, was implemented to be used as a reference condition. A variety of stimuli consisting of speech at different levels and speech plus environmental sounds were processed by the five systems and presented over headphones to three hearing-impaired subjects. Subjects rated the processed stimuli for intelligibility and quality. While no clear differences were found among the four compression systems, there were some major differences between the Dual Front-End systems and the Linear system. The direction of these differences varied with subject, and to a lesser degree, with stimulus condition. In addition, compression systems generally performed better in stimuli conditions with low SNRs, indicating that compression may be useful for suppression of background noise.
by Ivan Aguayo.
M.Eng.and S.B.
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Burgos, D. "Digital anthropology and educational eGames : learning through behavioural patterns in digital, game-based contexts." Thesis, University of Westminster, 2015. https://westminsterresearch.westminster.ac.uk/item/9x1qq/digital-anthropology-and-educational-egames-learning-through-behavioural-patterns-in-digital-game-based-contexts.
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The selected publications are focused on the relations between users, eGames and the educational context, and how they interact together, so that both learning and user performance are improved through feedback provision. A key part of this analysis is the identification of behavioural, anthropological patterns, so that users can be clustered based on their actions, and the steps taken in the system (e.g. social network, online community, or virtual campus). In doing so, we can analyse large data sets of information made by a broad user sample,which will provide more accurate statistical reports and readings. Furthermore, this research is focused on how users can be clustered based on individual and group behaviour, so that a personalized support through feedback is provided, and the personal learning process is improved as well as the group interaction. We take inputs from every person and from the group they belong to, cluster the contributions, find behavioural patterns and provide personalized feedback to the individual and the group, based on personal and group findings. And we do all this in the context of educational games integrated in learning communities and learning management systems. To carry out this research we design a set of research questions along the 10-year published work presented in this thesis. We ask if the users can be clustered together based on the inputs provided by them and their groups; if and how these data are useful to improve the learner performance and the group interaction; if and how feedback becomes a useful tool for such pedagogical goal; if and how eGames become a powerful context to deploy the pedagogical methodology and the various research methods and activities that make use of that feedback to encourage learning and interaction; if and how a game design and a learning design must be defined and implemented to achieve these objectives, and to facilitate the productive authoring and integration of eGames in pedagogical contexts and frameworks. We conclude that educational games are a resourceful tool to provide a user experience towards a better personalized learning performance and an enhance group interaction along the way. To do so, eGames, while integrated in an educational context, must follow a specific set of user and technical requirements, so that the playful context supports the pedagogical model underneath. We also conclude that, while playing, users can be clustered based on their personal behaviour and interaction with others, thanks to the pattern identification. Based on this information, a set of recommendations are provided Digital Anthropology and educational eGames 6 /216 to the user and the group in the form of personalized feedback, timely managed for an optimum impact on learning performance and group interaction level. In this research, Digital Anthropology is introduced as a concept at a late stage to provide a backbone across various academic fields including: Social Science, Cognitive Science, Behavioural Science, Educational games and, of course, Technology-enhance learning. Although just recently described as an evolution of traditional anthropology, this approach to digital behaviour and social structure facilitates the understanding amongst fields and a comprehensive view towards a combined approach. This research takes forward the already existing work and published research onusers and eGames for learning, and turns the focus onto the next step — the clustering of users based on their behaviour and offering proper, personalized feedback to the user based on that clustering, rather than just on isolated inputs from every user. Indeed, this pattern recognition in the described context of eGames in educational contexts, and towards the presented aim of personalized counselling to the user and the group through feedback, is something that has not been accomplished before.
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Gleeson, Jeremy Information Technology & Electrical Engineering Australian Defence Force Academy UNSW. "Finding the shipboard relative position of a rotary wing unmanned aerial vehicle (UAV) with ultasonic ranging." Awarded by:University of New South Wales - Australian Defence Force Academy, 2008. http://handle.unsw.edu.au/1959.4/38978.
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Simple, cheap and reliable echo-based ultrasonic ranging systems such as the Polaroid ranging unit are easily applied to indoor applications. However, to measure the range between an unmanned helicopter and a moving ship deck at sea using ultrasound requires a more robust ranging system, because rushing air and breaking water are known ultrasound noise sources. The work of designing, constructing and testing such a system is described in this dissertation. The compact, UAV ready ultrasound transmitter module provides high power, broadband arbitrary signal generation. The separate field-ready receiver is based on a modern embedded Digital Signal Processor (DSP), providing high speed matched-filter correlation processing. Large time-bandwidth signalling is employed to maximise the signal to noise ratio of the ranging system. Synthesised experiments demonstrate the ability of the correlation processing to reliably recover timing from signals buried in noise. Real world experiments demonstrate decimetre accuracy with two centimetre resolution, ten metre range and 32Hz refresh rate. A maximum boresight range of up to 38m is supported.
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Anderson, William R. T. "The use of literature as a practical aid to preaching." Available from the University of Aberdeen Library and Historic Collections Digital Resources. Online version available for University members only until Jan. 1, 2013, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=26241.
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Bürgin, Felix. "Low-power circuit architectures and clocking strategies for digital hearing aids." Konstanz Hartung-Gorre, 2008. http://d-nb.info/992181747/04.
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Schmisseur, Brooke E. B. "An Evaluation of Noise Reduction Effectiveness in Four Digital Hearing Aids." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1022253793.
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Darkgie, Jessica. "Hur kan digitala verktyg främja lärandet för elever med dyslexi sett ur ett elevperspektiv? : En kvalitativ intervjustudie om dyslektiska elevers upplevelser av digitala verktyg i sin skolundervisning." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-19773.
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Skolverket har som mål att stärka elevers digitala kompetens inom skolväsendet för att främja kunskapsutvecklingen och anser att mer forskning behövs för att se hur elever kan uppnå en hög digital kompetens. För att digitala verktyg ska kunna stötta elevers lärande behöver dessa verktyg utvärderas ur ett elevperspektiv, speciellt för elever med dyslexi som har ett stort behov av digitala verktyg för att uppnå kunskapskraven. När en elev har fått diagnosen dyslexi sätts digitala verktyg in i undervisningen i syfte att underlätta elevens svårigheter, däremot finns det lite forskning som visar på hur elever upplever digitala verktyg i deras undervisning och om de digitala verktygen verkligen stödjer eleverna i deras lärande.Syftet med studien var därför att ta reda på hur digitala verktyg kan främja lärandet för elever med dyslexi sett ur ett elevperspektiv. Genom en kvalitativ forskningsmetod och intervjuer med sex dyslektiska elever från högstadiet och gymnasiet har studien undersökt elevernas upplevelser av digitala verktyg i en skolmiljö. Resultatet från studien visade på att de flesta elever upplevde flera fördelar med digitala verktyg. Ett rättstavningsprogram bidrog till att elever kände flyt i sitt skrivande då de enkelt kunde rätta till grammatiska fel och stavfel. Genom att använda datorn som verktyg för att ta anteckningar kunde elever hänga med i skolan på ett bättre sätt. Läsförståelsen och ordförrådet förbättrades genom att lyssna på böcker med digitala verktyg. Motivationen ökade när elever kände att de utvecklades i deras lärande. Dock upplevde vissa elever även utmaningar med digitala verktyg som kunde hämma deras lärande. Röda undermarkeringar som påvisade felstavningar i ett rättstavningsprogram upplevdes som störande och negativa. Talsynteser med datoriserade röster upplevdes som svåra att förstå. Andra utmaningar som lyftes fram av eleverna var tekniska problem och brist på digital kompetens hos lärare. En lärarens kompetens för att anpassa ett digitalt stöd efter elevers olika behov ansågs som en viktig faktor för elevens lärande.The National Agency for Education aims to strengthen students' digital competence in the school system to promote student's development of knowledge and believes that more research is needed to see how students can meet a high level of digital competence. For digital tool's ability to support students' learning, these tools need to be evaluated from a student perspective, especially for students with dyslexia who have a great need for digital tools to achieve the knowledge requirements. When a student is diagnosed with dyslexia, digital tools are used in the teaching to alleviate the student's difficulties nevertheless there is little research that shows how students experience digital tools in their education and whether the digital tools support students in their learning.The purpose of the study omitted to find out how digital tools can promote learning for students with dyslexia from a student perspective. Through a qualitative research methodand interviews with six dyslexic students from high school and high school, the study has examined students' experiences of digital tools in a school environment.The results from the study showed that most students experienced several benefits of digital tools. A spelling program helped students feel fluent in their writing because of the easiness of correct grammatical errors and spelling errors. Students could keep up with the school better by using the computer as a tool for taking notes. Reading comprehension and vocabulary were improved by listening to books with digital tools. Motivation increased when students felt that they were developing in their learning. However, some students also experienced challenges with digital tools that could hamper their learning. Students perceived red underscores that indicated misspellings in a spelling program as disruptive and negative. Students perceived speech syntheses with computerized voices as hard to understand. Other challenges highlighted by the students were technical problems and lack of digital competence in teachers. A teacher's competence to adopt digital support to students' different needs was considered a key reason for the student's learning.
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Eriksson, Jeanette. "Formativ bedömning inom digitala läromedel i matematik : Återkoppling - nödvändigt för både lärare och elev." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-73062.
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The use of digital teaching materials in mathematics is becoming increasingly more common within school teaching. Examining the teaching material becomes an important part of the teacher's work. Not least to ensure a successful teaching that is quality assured, against the Swedish curriculum. Successful teaching has long been characterized by formative assessment for learning. In this work, five digital teaching materials for mathematics have been examined through a qualitative content analysis. The purpose has been to establish the feedback structure of the digital teaching aids. The digital teaching materials that have been studied are designed for pupils in grades 1–3, where both a pupil client and teacher client are included. The survey has been based on an analysis schedule and the result has been set against various key factors for feedback. The result showed that three out of five digital teaching materials are "smart" and can provide the pupil with tasks that contribute to the pupil's progression. Yet, it´s only one of five digital teaching materials that has a well-developed system that makes full use of the potential that exists in a digital teaching material. A summary conclusion is that the digital teaching materials seem to strive to design a formative feedback structure, while some of the teaching aids do not pretend to be anything but a tool for quantity training.Användning av digitala läromedel i matematik, blir allt vanligare i skolans undervisning. Att granska läromedlet blir således en viktig del av lärarens arbete. Inte minst för att säkerställa en framgångsrik undervisning som är kvalitetssäkrad, mot den svenska läroplanen. Framgångsrik undervisning har länge präglats av formativ bedömning för lärande. I det här arbetet har fem digitala läromedel för matematik undersökts genom en kvalitativ innehållsanalys. Syftet har varit att fastställa de digitala läromedlens återkopplingsstruktur. De digitala läromedel som har undersökts är framtagna för elever i årkurs 1–3, där både en elevklient och lärarklient är inkluderade. Undersökningen har utgått ifrån ett analysschema och resultatet har ställts mot olika nyckelfaktorer för formativ återkoppling. Resultatet visade att tre av fem läromedel är ”smarta” och kan förse eleven med uppgifter som bidrar till elevens progression. Samtidigt så är det endast ett av fem läromedel som har ett väl utvecklat system som till fullo använder sig av den potential som föreligger ett digitalt läromedel. En sammanfattande slutsats är att de digitala läromedlen förefaller strävar efter att utforma en formativ återkopplingsstruktur, samtidigt som några av läromedlen inte utger sig för att vara något annat än ett redskap för att mängdträna.
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Joly, Yvan. "A digital speech transformation system for developing aids for the hearing impaired /." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60047.
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This thesis presents the design of a digital speech transformation system for developing aids for the hearing impaired. The system is required to perform, in real time, four basic speech transformations: time-scale modification, frequency-scale modification, pitch modification, and spectral envelope modification. It is based on the sinusoidal representation of Quartieri and McAulay, but achieves the required deconvolution of the speech signal by liner prediction, rather than homomorphic filtering.The system is implemented in software, and a detailed study is done to determine the type of hardware implementation required to perform the speech transformations in real time. The proposed implementation is a multiprocessor system based on the TMS320C25 digital signal processor. Results obtained on an emulator for the TMS320C25 demonstrate the ability of the system to analyze and synthesize the speech signal in real time, while results obtained by simulation demonstrate its transformation capabilities.
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Summe, Lori Ann. "Noise reduction in digital hearing aids with a background of environmental sounds." Cincinnati, Ohio : University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1052327314.
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Juras, Sherrie Ann. "Digital portfolios: Advancing assessment through technology." CSUSB ScholarWorks, 2001. https://scholarworks.lib.csusb.edu/etd-project/1951.
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The project discusses how evolving technologies used to create digital portfolios can demonstrate student achievement in virtually unlimited ways. Evidence of student growth and achievement can be documented digitally. Such evidence can take the form of text, graphics, photos, sound, video data, and can even include database records of standardized or course-end test scores and grades.
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Parsons, Colton A. "Variable Precision Tandem Analog-to-Digital Converter (ADC)." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1255.
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This paper describes an analog-to-digital signal converter which varies its precision as a function of input slew rate (maximum signal rate of change), in order to best follow the input in real time. It uses Flash and Successive Approximation (SAR) conversion techniques in sequence.
As part of the design, the concept of "total real-time optimization" is explored, where any delay at all is treated as an error (Error = Delay * Signal Slew Rate). This error metric is proposed for use in digital control systems. The ADC uses a 4-bit Flash converter in tandem with SAR logic that has variable precision (0 to 11 bits). This allows the Tandem ADC to switch from a fast, imprecise converter to a slow, precise converter. The level of precision is determined by the input’s peak rate of change, optimized for minimum real-time error; a secondary goal is to react quickly to input transient spikes.
The implementation of the Tandem ADC is described, along with various issues which arise when designing such a converter and how they may be dealt with. These include Flash ADC inaccuracies, rounding issues, and system timing and synchronization.
Most of the design is described down to the level of logic gates and related building blocks (e.g. latches and flip-flops), and various logic optimizations are used in the design to reduce calculation delays. The design also avoids active analog circuitry whenever possible – it can be almost entirely implemented with CMOS logic and passive analog components.
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Salorio, Corbetto Marina. "Comparison of different forms of frequency lowering in digital hearing aids for people with dead regions in the cochlea." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708542.
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