75,165 research outputs found

    SoC Software Components Diagnosis Technology

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    A novel approach to evaluation of hardware and software testability, represented in the form of register transfer graph, is proposed. Instances of making of software graph models for their subsequent testing and diagnosis are shown.Comment: 4 page

    On-Line Dependability Enhancement of Multiprocessor SoCs by Resource Management

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    This paper describes a new approach towards dependable design of homogeneous multi-processor SoCs in an example satellite-navigation application. First, the NoC dependability is functionally verified via embedded software. Then the Xentium processor tiles are periodically verified via on-line self-testing techniques, by using a new IIP Dependability Manager. Based on the Dependability Manager results, faulty tiles are electronically excluded and replaced by fault-free spare tiles via on-line resource management. This integrated approach enables fast electronic fault detection/diagnosis and repair, and hence a high system availability. The dependability application runs in parallel with the actual application, resulting in a very dependable system. All parts have been verified by simulation

    A Hierachical Infrastrucutre for SOC Test Management

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    HD2BIST - a complete hierarchical framework for BIST scheduling, data-patterns delivery, and diagnosis of complex systems - maximizes and simplifies the reuse of built-in test architectures. HD2BIST optimizes the flexibility for chip designers in planning an overall SoC test strategy by defining a test access method that provides direct virtual access to each core of the system

    Design and implementation of a multi-octave-band audio camera for realtime diagnosis

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    Noise pollution investigation takes advantage of two common methods of diagnosis: measurement using a Sound Level Meter and acoustical imaging. The former enables a detailed analysis of the surrounding noise spectrum whereas the latter is rather used for source localization. Both approaches complete each other, and merging them into a unique system, working in realtime, would offer new possibilities of dynamic diagnosis. This paper describes the design of a complete system for this purpose: imaging in realtime the acoustic field at different octave bands, with a convenient device. The acoustic field is sampled in time and space using an array of MEMS microphones. This recent technology enables a compact and fully digital design of the system. However, performing realtime imaging with resource-intensive algorithm on a large amount of measured data confronts with a technical challenge. This is overcome by executing the whole process on a Graphic Processing Unit, which has recently become an attractive device for parallel computing

    Profound vision loss impairs psychological well-being in young and middle-aged individuals.

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    PurposeThe aim of this study was to evaluate the effects of profound vision loss on psychological well-being in adolescents, young adults, and middle-aged adults with regard to mood, interpersonal interactions, and career-related goals. In addition, we assessed the significance of the resources that may be used to enhance psychological well-being in cases of profound vision loss, and in particular, examined the utility of low vision aids and the role of the ophthalmologist as a provider of emotional support.MethodsA questionnaire was issued to individuals aged 13-65 years with profound vision loss resulting from Leber's hereditary optic neuropathy (LHON). Depression prevalence was evaluated with questions regarding major depressive disorder symptomatology. Participants appraised the effects of vision loss on their interpersonal interactions and career goals by providing an impact rating (IR) on a 21-point psychometric scale from -10 to +10. Social well-being index was defined as the average of interpersonal IR and career IR. Subjects were additionally asked about the use of low vision aids and sources of emotional support.ResultsA total of 103 participants (mean age =26.4±11.2 years at LHON diagnosis; mean ± standard deviation) completed the questionnaire. Nearly half (49.5%) met the depression criteria after vision loss. Negative impacts on interpersonal interactions (median IR = -5) and career goals (median IR = -6) were observed; both ratings were worse (P<0.001) for depressed versus nondepressed subjects. Older age at diagnosis corresponded to higher depression prevalence and increased incidence of negative interpersonal IR and career IR. Sixty-eight percent of subjects used electronic vision aids; controlling for age, social well-being index was higher among these individuals than for those who did not use electronic aids (P=0.03). Over half of the participants (52.4%) asserted that they derived emotional support from their ophthalmologist.ConclusionProfound vision loss in adolescents, young adults, and middle-aged adults is associated with significant negative psychological and psychosocial effects, which are influenced by age and use of electronic vision aids. Ophthalmologists, in addition to managing vision loss, may serve an important role in the emotional adaptation of these patients

    Methods of Technical Prognostics Applicable to Embedded Systems

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    HlavnĂ­ cĂ­lem dizertace je poskytnutĂ­ ucelenĂ©ho pohledu na problematiku technickĂ© prognostiky, kterĂĄ nachĂĄzĂ­ uplatněnĂ­ v tzv. prediktivnĂ­ ĂșdrĆŸbě zaloĆŸenĂ© na trvalĂ©m monitorovĂĄnĂ­ zaƙízenĂ­ a odhadu Ășrovně degradace systĂ©mu či jeho zbĂœvajĂ­cĂ­ ĆŸivotnosti a to zejmĂ©na v oblasti komplexnĂ­ch zaƙízenĂ­ a strojĆŻ. V současnosti je technickĂĄ diagnostika poměrně dobƙe zmapovanĂĄ a reĂĄlně nasazenĂĄ na rozdĂ­l od technickĂ© prognostiky, kterĂĄ je stĂĄle rozvĂ­jejĂ­cĂ­m se oborem, kterĂœ ovĆĄem postrĂĄdĂĄ větĆĄĂ­ mnoĆŸstvĂ­ reĂĄlnĂœch aplikaci a navĂ­c ne vĆĄechny metody jsou dostatečně pƙesnĂ© a aplikovatelnĂ© pro embedded systĂ©my. DizertačnĂ­ prĂĄce pƙinĂĄĆĄĂ­ pƙehled zĂĄkladnĂ­ch metod pouĆŸitelnĂœch pro Ășčely predikce zbĂœvajĂ­cĂ­ uĆŸitnĂ© ĆŸivotnosti, jsou zde popsĂĄny metriky pomocĂ­, kterĂœch je moĆŸnĂ© jednotlivĂ© pƙístupy porovnĂĄvat aĆ„ uĆŸ z pohledu pƙesnosti, ale takĂ© i z pohledu vĂœpočetnĂ­ nĂĄročnosti. Jedno z dizertačnĂ­ch jader tvoƙí doporučenĂ­ a postup pro vĂœběr vhodnĂ© prognostickĂ© metody s ohledem na prognostickĂĄ kritĂ©ria. DalĆĄĂ­m dizertačnĂ­m jĂĄdrem je pƙedstavenĂ­ tzv. částicovĂ©ho filtrovanĂ­ (particle filtering) vhodnĂ© pro model-based prognostiku s ověƙenĂ­m jejich implementace a porovnĂĄnĂ­m. HlavnĂ­ dizertačnĂ­ jĂĄdro reprezentuje pƙípadovou studii pro velmi aktuĂĄlnĂ­ tĂ©ma prognostiky Li-Ion baterii s ohledem na trvalĂ© monitorovĂĄnĂ­. PƙípadovĂĄ studie demonstruje proces prognostiky zaloĆŸenĂ© na modelu a srovnĂĄvĂĄ moĆŸnĂ© pƙístupy jednak pro odhad doby pƙed vybitĂ­m baterie, ale takĂ© sleduje moĆŸnĂ© vlivy na degradaci baterie. SoučástĂ­ prĂĄce je zĂĄkladnĂ­ ověƙenĂ­ modelu Li-Ion baterie a nĂĄvrh prognostickĂ©ho procesu.The main aim of the thesis is to provide a comprehensive overview of technical prognosis, which is applied in the condition based maintenance, based on continuous device monitoring and remaining useful life estimation, especially in the field of complex equipment and machinery. Nowadays technical prognosis is still evolving discipline with limited number of real applications and is not so well developed as technical diagnostics, which is fairly well mapped and deployed in real systems. Thesis provides an overview of basic methods applicable for prediction of remaining useful life, metrics, which can help to compare the different approaches both in terms of accuracy and in terms of computational/deployment cost. One of the research cores consists of recommendations and guide for selecting the appropriate forecasting method with regard to the prognostic criteria. Second thesis research core provides description and applicability of particle filtering framework suitable for model-based forecasting. Verification of their implementation and comparison is provided. The main research topic of the thesis provides a case study for a very actual Li-Ion battery health monitoring and prognostics with respect to continuous monitoring. The case study demonstrates the prognostic process based on the model and compares the possible approaches for estimating both the runtime and capacity fade. Proposed methodology is verified on real measured data.
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