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  • 1
    In: The Analyst, 2014, Vol.139(7), pp.1653-1660
    Description: This paper presents an ultrasensitive fluorescent detection method through fabricating a silver microarray substrate. Silver nanoparticles (AgNPs) and Ag@Au coreshell nanoparticles with different sizes were first synthesized by a seed-mediated growth method and the metal-enhanced fluorescence of these nanoparticles on different fluorescent dyes was investigated. The results indicated that AgNPs could act as a versatile and effective metal-enhanced fluorescence material for various fluorophores, whereas the enhanced fluorescence from Ag@Au was limited only to certain fluorophores. When the AgNPs were functionalized with aptamers and fluorescent dyes, a good analytical performance for simultaneous detection of human IgE and platelet-derived growth factor-BB (PDGF-BB) could be obtained. AgNPs were not only used as detection tags but also used to fabricate the plasmonic microarray substrate to further enhance the sensitivity of fluorescent detection. As a result, a linear response to PDGF-BB concentration was obtained in the concentration range of 16 pg mL 1 to 50 ng mL 1 , and the detection limit was 3.2 pg mL 1 . In addition, the AgNP modified plasmonic microarrays showed remarkable recovery and no significant interference from human serum when applied to 2 ng mL 1 PDGF-BB concentration. The plasmonic microarray substrate demonstrated both high specificity and sensitivity for protein microarray detection and this novel approach has great potential for ultrasensitive detection of protein biomarkers in the bio-medical field.
    Subject(s): Plasmonics ; Fluorescence ; Human ; Proteins ; Silver ; Nanoparticles ; Chemical Compounds ; Fluorescent Dyes ; Instruments and Measurements (So) ; Analysis (MD) ; Chemical Analysis (Ep) ; Chemical Analysis (Ed) ; Chemical Analysis (EC);
    ISSN: 0003-2654
    E-ISSN: 1364-5528
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  • 2
    Language: English
    In: Personality and Individual Differences, July 2016, Vol.97, pp.289-299
    Description: Most prior studies regarding navigational efficiency of electronic maps mainly investigated map characteristics such as the frame of references of maps (track-up maps vs. north-up maps) and the map dimensionality (2D maps vs. 3D maps). However, relatively little research has been found regarding how user characteristics, especially a user’s cognitive style, affect the effectiveness of navigational displays. The present study examined how individuals’ field dependence-independence, as an essential dimension of cognitive styles, affects user performance in orienting and navigating tasks with 2D and 3D electronic maps. The results suggested field-independent individuals had higher mental rotation ability than field-dependent individuals. The results also indicated significant interactions between field dependence-independence and frame of reference on both orienting and navigating tasks. Field-independent (FI) individuals responded more quickly and with higher accuracy compared to...
    Subject(s): Field Dependence-Independence ; Frame of Reference ; Electronic Maps ; Field Dependence-Independence ; Frame of Reference ; Electronic Maps ; Psychology
    ISSN: 0191-8869
    E-ISSN: 1873-3549
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  • 3
    Language: English
    In: Perceptual and Motor Skills, February 2012, Vol.114(1), pp.339-351
    Description: Age-related differences in rare-target search are primarily explained by the speed-accuracy trade-off, primed responses, or decision making. The goal was to examine how motor inhibition influences visual search. Children pressed a key when a rare target was detected. On no-target trials, children withheld reactions. Response time (RT), hits, misses, correct rejection, and false alarms were measured. Tapping tests assessed motor control. Older children tapped faster, were more sensitive to rare targets (higher d'), and reacted more slowly than younger ones. Girls outperformed boys in search sensitivity but not in RT. Motor speed was closely associated with hit rate and RT. Results suggest that development of inhibitory control plays a key role in visual detection. The potential implications for cognitive-motor development and individual differences are discussed.
    Subject(s): Psychology
    ISSN: 0031-5125
    E-ISSN: 1558-688X
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  • 4
    Language: English
    In: Proceedings of the Human Factors and Ergonomics Society Annual Meeting, September 2016, Vol.60(1), pp.840-840
    Description: Recent advances in information technology have led to the extensive use of electronic maps in navigation tasks. An important question is how to present information about locations and directions to facilitate navigation tasks performed by different users. Extensive studies in the literature have investigated the effect of the frame of reference (i.e., North-Up and Track-Up Electronic Maps) on navigation performance but found disparate results regarding the best type of maps to optimize performance (Aretz & Wickens, 1992; Cuevas, Huthman, Knudsen, and Wei, 2001). The field dependence-independence (FDI), as one of the cognitive styles, has been found to affect an individual’s way of orienting in virtual environments but not their performance in orienting tasks (Kroutter, 2010). However, few studies have been carried out to research how users’ cognitive styles interacted with map characteristics, which in turn influenced their navigation performance. The current work investigated...
    Subject(s): Engineering
    ISSN: 1541-9312
    ISSN: 10711813
    E-ISSN: 2169-5067
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  • 5
    Conference Proceeding
    Conference Proceeding
    2016
    Language: English
    In: 2016 IEEE International Conference on Information and Automation (ICIA), August 2016, pp.2065-2070
    Description: With the rapid growth of Internet consumption, the various product comments' form and redundant information are not convenient for the customers to grasp the hot opinions of the historical comments. In view of this, this paper studies the hot opinions of the products' comments and takes the hotel comments data as the main research objects. We filter the comment data from the length of the comments and the feature selection aspect by analyzing the characteristics of hotel comment data. We construct the mathematical model for the processed data and then adopt the affinity propagation clustering algorithm to extract the final hot opinions. Compared with the original comments, the experiment results of the hot opinion extraction are more concise and clear expressed.
    Subject(s): Clustering Algorithms ; Data Mining ; Feature Extraction ; Mathematical Model ; Algorithm Design and Analysis ; Data Models ; Semantics ; Opinion Mining ; Comments ; Feature Selection ; Similarity Calculation
    Source: IEEE Conference Publications
    Source: IEEE Xplore
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  • 6
    In: HFES, Human Factors and Ergonomics Society Annual Meeting, 2016, 2016, Vol.60, p.840
    Subject(s): Informationstechnologie
    ISSN: 1071-1813
    Source: wiso Wirtschaftswissenschaften (GBI-Genios Deutsche Wirtschaftsdatenbank GmbH) 〈img src="http://exlibris-pub.s3.amazonaws.com/wiso_logo.jpg" style="vertical-align:middle;margin-left:7px"〉
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  • 7
    Language: English
    In: 2016 9th International Symposium on Computational Intelligence and Design (ISCID), December 2016, Vol.2, pp.248-251
    Description: The display mode of character scrolling has been widely applied in display design. This study mainly aims to examine the impact of different sizes of characters on visual search through the performance of visual search and ratings of subjective difficulties. A total of 12 college students participate in completing the visual search task of the target words in the rolling characters. The study aims to analyze the accuracy of this visual search, the reaction time and the grading results of the search difficulties. The experimental results show that with the decrease of the size of characters and the increase of the rolling speed of characters, the visual search performance will significantly reduce, the rating of the participants' subjective difficulties will improve. However, when the rolling speed is at 20pix/s to 140pix/s, the size of characters may have more effects on the performance than the scrolling speed significantly. Especially when the size is 10 pt, the search performance and subjective evaluation will be dropped significantly. The result of this study provides an advice for the design of the display of the scrolling characters that the character size should be greater than 10pt, and the rolling speed should be higher than 20pix/s.
    Subject(s): Decision Support Systems ; Visualization ; Handheld Computers ; Computational Intelligence ; Rolling Speed ; Chinese Characters ; Visual Search ; Computer Science
    E-ISSN: 2473-3547
    Source: IEEE Conference Publications
    Source: IEEE Xplore
    Source: IEEE Journals & Magazines 
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  • 8
    Conference Proceeding
    Conference Proceeding
    2011
    ISBN: 9781457706769  ISBN: 1457706768  ISBN: 9780769544441 
    Language: English
    In: 2011 Third International Conference on Intelligent Human-Machine Systems and Cybernetics, August 2011, Vol.1, pp.12-15
    Description: This research studied the usability problems of YAH maps in Westlake Scenery District. At first phase, using structured interview method, the usability problems of the maps in the District were investigated, and the amending advice were put forward according to the problems, and secondly, a performance comparison experiment was conducted to explore whether an improved YAH symbol performed better than the before. The results showed that: (1) there were totally six usability problems in four categories, such as inconspicuous YAH symbol, improper placement et al., in exist maps. (2) The YAH symbol amended map performed better than the before on judging directions. This study may provide some guidance on the design of West Lake navigation system, or other similar public space design.
    Subject(s): Navigation ; Usability ; Interviews ; Indexes ; Color ; Layout ; Educational Institutions ; Navigational Map ; Yah Map ; Usability ; Investigation
    ISBN: 9781457706769
    ISBN: 1457706768
    ISBN: 9780769544441
    Source: IEEE Conference Publications
    Source: IEEE Xplore
    Source: IEEE Journals & Magazines 
    Source: IEEE eBooks
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  • 9
    Conference Proceeding
    Conference Proceeding
    2009
    ISBN: 9780769537528  ISBN: 0769537529 
    Language: English
    In: 2009 International Conference on Intelligent Human-Machine Systems and Cybernetics, August 2009, Vol.2, pp.455-458
    Description: The purpose of this study was to evaluate the effects of computer pointing devices on computer using of aging people in Chinese mainland. A total of 16 elder users whose average age was 65 without any computer experience before were selected as subjects in a tracking task. Three pointing devices including traditional mouse, touch pad and track point in notebook were evaluated. The operation performance which included correct ratio and operation time and the subjective reaction using NASA-TLX workload questionnaire were recorded during the tasks. The results of ANOVA showed that the accuracy ratios of the three pointing devices were not significantly different, and the mean operation time for the correct trials of track point was significantly longer than the other two devices. The further correlation analysis between the operation times and scores of workload indicated that the performance index of operation time for pointing devices correlated with satisfaction scores.
    Subject(s): Aging ; Mice ; Psychology ; Analysis of Variance ; Performance Analysis ; Senior Citizens ; Intelligent Systems ; Man Machine Systems ; Cybernetics ; Educational Institutions ; Age People ; Computer Pointing Device ; Tracking Task ; Engineering ; Psychology
    ISBN: 9780769537528
    ISBN: 0769537529
    Source: IEEE Conference Publications
    Source: IEEE Xplore
    Source: IEEE Journals & Magazines 
    Source: IEEE eBooks
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  • 10
    Language: English
    In: Frontiers in psychology, 01 June 2020, Vol.11
    Description: Research on the acquisition of spatial knowledge not only enriches our understanding of the theory of spatial knowledge representation but also creates practical value for the application of spatial knowledge. The aim of this study is to understand the impact of different learning methods on the acquisition of spatial knowledge, including the role of 2D maps, the difference between physical interaction and virtual interaction, and whether passive learning can replace active learning in virtual environments. One experiment was conducted, in which landmark knowledge and configurational knowledge were measured. Results indicate that 2D maps play a supporting role in acquiring both landmark knowledge and configurational knowledge. In addition, physical learning was associated with better spatial knowledge representation compared with virtual learning. An analysis of observational data in the third comparison found no significant difference between passive learning and active learning...
    Subject(s): Spatial Knowledge ; Learning Methods ; Field Navigation Learning ; 2d Map-Assisted Field Navigation Learning ; Virtual Street View Map Learning ; Active Learning ; Psychology
    E-ISSN: 1664-1078
    Source: Directory of Open Access Journals (DOAJ)
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