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  • Books
  • Articles  (280)
  • Electrical Engineering, Measurement and Control Technology  (170)
  • Computer Science  (113)
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  • Books
  • Articles  (280)
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  • 1
    Electronic Resource
    Electronic Resource
    High-performance autofocus circuit for biological microscopy (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 3966-3977 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An autofocus circuit, based on measurement of the high spatial frequency image components, was designed for automated microscopic scanning of biological specimens. By careful consideration of the system transfer function, elimination of video end-of-line filter artifacts, correction for illumination instability, and incorporation of autogain, the focus measurement circuit attained the sensitivity and dynamic range necessary for robust operation even at the extremes of biological specimen detail encountered in exhaustive raster scans of thousands of fields. This new circuit exhibited a 25-fold improvement in dynamic range over a previous analog implementation, matched real-time digital performance at an order of magnitude lower cost, resulted in autofocus precision of 56 nm (or 10-fold better than the depth of field of the objective) in scanning experiments comprising over 10 000 microscope fields, and tracked focus at scanning speeds of up to 3.45 fields/s. Focus was correctly maintained in these scanning experiments without additional compensation for low-detail images. This circuit makes possible the widespread inclusion of high-performance autofocus as a low cost option in video microscopy systems. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149207
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrasonics—temperature shapes the envelope (1994)
    Bradford : Emerald
    Sensor review 14 (1994), S. 19-23 
    Details
    ISSN: 0260-2288
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Analyses the effects of temperature on the behaviour of ultrasonicsensors applied to object recognition. Describes the measurement systememployed, the environmental considerations of ultrasonic sensors and looks atthe most commonly used parameters to analyse the echo form in the recognitionprocess. Evaluates the performance of the parametric model of the ultrasonicecho signal with a comparative study of different ultrasonictransducers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/EUM0000000004234
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Comparison of SiO"x and polyimide as a dielectric layer on stainless steel in thin-film pressure sensor manufacture
    Amsterdam : Elsevier
    Sensors and Actuators A: Physical 32 (1992), S. 611-615 
    Details
    ISSN: 0924-4247
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0924-4247(92)80052-5
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Implementation of the Decorrelating Receiver for Asynchronous DS-CDMA Systems over Multipath Fading Channels (2000)
    Springer
    Wireless personal communications 15 (2000), S. 79-95 
    Details
    ISSN: 1572-834X
    Keywords: CDMA ; multiuser detection ; multipath fading channel ; decorrelating detector
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract This paper presents a decorrelating detector for DS-CDMAasynchronous systems over multipath fading channels. The decorrelatingreceiver applies the inverse correlation matrix of signature waveformsto detect the received signal. A procedure for finding such an inversematrix is developed. This procedure employs the reciprocal basis,derived from the basis of normalized user signatures, to cancelsimultaneously both the multiuser and the intersymbolinterference. The proposed multiuser detector operates over a finitedetection window, and the only restriction imposed on the set of signaturesis that the signatures must be independent at the receiver end. If the channelis slowly variant, the detectorcan be very efficient for high bit rate transmissions. Theoreticalbounds for the multiuser interference are obtained. Simulationresults, in which both binary and non-binary sequences are used,reveal that the behaviour of the detector approaches the single userbound when an adequate set of signatures is employed. The reducedcomplexity of this detector indicates that it could be a good candidatefor practical implementation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008959121461
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  • 5
    Electronic Resource
    Electronic Resource
    A method of designing systems with quasi-surface waves (1965)
    Springer
    Radiophysics and quantum electronics 8 (1965), S. 601-603 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01038345
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Correlation of echoencephalographic findings and neurodevelopmental outcome: Intracranial hemorrhage and ventriculomegaly in infants of birth weight 1,000 grams or less (1987)
    Springer
    Journal of clinical monitoring and computing 3 (1987), S. 178-186 
    Details
    ISSN: 1573-2614
    Keywords: Measurement techniques: echoencephalography ; Hemorrhage ; cerebral ; Brain: hemorrhage ; hydrocephalus ; Complications: neurologic ; Child development disorders ; Infant ; premature: diseases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract Echoencephalograms were obtained for 118 of 121 successive infants who were admitted to the Stanford intensive care nursery, weighed 1,000 g or less at birth, and survived long enough for at least one study to be performed. Eightyeight of these infants survived and were followed up for 1 to 3 years; psychometric testing (Bayley Scales of Infant Development, Stanford-Binet Intelligence Scale, or both) was performed on 81% of these infants. Subependymal-intraventricular hemorrhages or intraparenchymal hemorrhages were associated with impaired development, but ventriculomegaly was not. The absence of echoencephalographic abnormalities did not exclude the possibility of impaired development in many infants. Periventricular leukomalacia was not observed. These data support independent scoring of subependymal intraventricular hemorrhages, intraparenchymal hemorrhages, and ventriculomegaly, rather than use of combined scales for prognostic purposes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01695940
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    Paper (German National Licenses)
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  • 7
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    Energy levels of the quartic double well using a phase-integral method (1993)
    American Physical Society
    Details
    Publication Date: 1993-11-01
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Physical Society
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  • 8
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    Gene Expression Signatures Based on Variability can Robustly Predict Tumor Progression and Prognosis (2015)
    Libertas Academica
    Details
    Publication Date: 2015-06-08
    Description: Gene expression signatures are commonly used to create cancer prognosis and diagnosis methods, yet only a small number of them are successfully deployed in the clinic since many fail to replicate performance on subsequent validation. A primary reason for this lack of reproducibility is the fact that these signatures attempt to model the highly variable and unstable genomic behavior of cancer. Our group recently introduced gene expression anti-profiles as a robust methodology to derive gene expression signatures based on the observation that while gene expression measurements are highly heterogeneous across tumors of a specific cancer type relative to the normal tissue, their degree of deviation from normal tissue expression in specific genes involved in tissue differentiation is a stable tumor mark that is reproducible across experiments and cancer types. Here we show that constructing gene expression signatures based on variability and the anti-profile approach yields classifiers capable of successfully distinguishing benign growths from cancerous growths based on deviation from normal expression. We then show that this same approach generates stable and reproducible signatures that predict probability of relapse and survival based on tumor gene expression. These results suggest that using the anti-profile framework for the discovery of genomic signatures is an avenue leading to the development of reproducible signatures suitable for adoption in clinical settings.
    Electronic ISSN: 1176-9351
    Topics: Computer Science , Medicine
    Published by Libertas Academica
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  • 9
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    PsyGeNET: a knowledge platform on psychiatric disorders and their genes (2015)
    Oxford University Press
    Details
    Publication Date: 2015-09-11
    Description: : PsyGeNET (Psychiatric disorders and Genes association NETwork) is a knowledge platform for the exploratory analysis of psychiatric diseases and their associated genes. PsyGeNET is composed of a database and a web interface supporting data search, visualization, filtering and sharing. PsyGeNET integrates information from DisGeNET and data extracted from the literature by text mining, which has been curated by domain experts. It currently contains 2642 associations between 1271 genes and 37 psychiatric disease concepts. In its first release, PsyGeNET is focused on three psychiatric disorders: major depression, alcohol and cocaine use disorders. PsyGeNET represents a comprehensive, open access resource for the analysis of the molecular mechanisms underpinning psychiatric disorders and their comorbidities. Availability and implementation: The PysGeNET platform is freely available at http://www.psygenet.org/ . The PsyGeNET database is made available under the Open Database License ( http://opendatacommons.org/licenses/odbl/1.0/ ). Contact: lfurlong@imim.es Supplementary information : Supplementary data are available at Bioinformatics online.
    Print ISSN: 1367-4803
    Electronic ISSN: 1460-2059
    Topics: Biology , Computer Science , Medicine
    Published by Oxford University Press
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  • 10
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    Sensors, Vol. 16, Pages 934: Optimization of the Coverage and Accuracy of an Indoor Positioning System with a Variable Number of Sensors (2016)
    MDPI Publishing
    In: Sensors
    Details
    Publication Date: 2016-06-23
    Description: This paper focuses on optimal sensor deployment for indoor localization with a multi-objective evolutionary algorithm. Our goal is to obtain an algorithm to deploy sensors taking the number of sensors, accuracy and coverage into account. Contrary to most works in the literature, we consider the presence of obstacles in the region of interest (ROI) that can cause occlusions between the target and some sensors. In addition, we aim to obtain all of the Pareto optimal solutions regarding the number of sensors, coverage and accuracy. To deal with a variable number of sensors, we add speciation and structural mutations to the well-known non-dominated sorting genetic algorithm (NSGA-II). Speciation allows one to keep the evolution of sensor sets under control and to apply genetic operators to them so that they compete with other sets of the same size. We show some case studies of the sensor placement of an infrared range-difference indoor positioning system with a fairly complex model of the error of the measurements. The results obtained by our algorithm are compared to sensor placement patterns obtained with random deployment to highlight the relevance of using such a deployment algorithm.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
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