Near Real Time Heading Drift Correction for indoor pedestrian tracking based on sequence detection

Abstract Minegishi, Y., Yoshinaga, T., Aoyama, J., and Tsukamoto, K. 2009. Species identification of Anguilla japonica by real-time PCR based on a sequence detection system: a practical application to eggs and larvae. – ICES Journal of Marine Science, 66: 1915–1918. To develop a practical method for identifying Japanese eel Anguilla japonica eggs and larvae to species by a sequence detection system using a real-time polymerase chain reaction (PCR), we examined (i) the sensitivity of the system using samples at various developmental stages, and (ii) influences of intra- and interspecific DNA sequence variations in the PCR target region. PCR amplifications with extracted DNA solution at 7.0 ng µl−1 or lower were efficient at distinguishing A. japonica from other anguillids. A single egg at the gastrula or later developmental stages could also be identified. Two sequence variations in the PCR target region were observed in 2 out of 35 A. japonica collected from three localities, and from four year classes at a single locality. These mutations, however, did not affect the result of species identification achieved by A. japonica-specific PCR primers and probe. The accuracy of this PCR-based method of species identification will help in field surveys of the species.

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Real-time pedestrian tracking in natural scenes

Computer Analysis of Images and Patterns - Lecture Notes in Computer Science ◽

10.1007/3-540-63460-6_98 ◽

1997 ◽

pp. 42-49 ◽

Cited By ~ 8

Author(s):

J. Denzler ◽

H. Niemann

Keyword(s):

Real Time ◽

Natural Scenes ◽

Pedestrian Tracking

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Economic and Synergistic Pedestrian Tracking System with Service Cooperation for Indoor Environments

International Journal of Organizational and Collective Intelligence ◽

10.4018/ijoci.2011010101 ◽

2011 ◽

Vol 2 (1) ◽

pp. 1-20 ◽

Cited By ~ 8

Author(s):

Tomoya Ishikawa ◽

Masakatsu Kourogi ◽

Takeshi Kurata

Keyword(s):

Indoor Environment ◽

Tracking System ◽

Tracking Performance ◽

Quality Of Services ◽

Rfid Tags ◽

Indoor Environments ◽

Pedestrian Tracking ◽

Security Services ◽

Indoor Pedestrian Tracking

This paper describes an indoor pedestrian tracking system that can economically improve the tracking performance and the quality and value of services by incorporating other services synergistically. The tracking system obtains position, orientation, and action of pedestrians continuously and accurately in large indoor environments by utilizing surveillance cameras and active RFID tags for security services and 3-D environment models for navigation services. Considering service cooperation and co-creative intelligence cycles, this system can improve both the tracking performance and the quality of services without significant increase of costs by sharing the existing infrastructures and the 3-D models among services. The authors conducted an evaluation of the tracking system in a large indoor environment and confirmed that the accuracy of the system can be improved by utilizing the infrastructures and the 3-D models. Synergistic services utilizing the tracking system and service cooperation can also enhance the quality and value of services.

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Improved chemical exchange saturation transfer imaging with real-time frequency drift correction

Magnetic Resonance in Medicine ◽

10.1002/mrm.27663 ◽

2019 ◽

Vol 81 (5) ◽

pp. 2915-2923 ◽

Cited By ~ 5

Author(s):

Ruibin Liu ◽

Hongxi Zhang ◽

Weiming Niu ◽

Can Lai ◽

Qiuping Ding ◽

...

Keyword(s):

Real Time ◽

Chemical Exchange ◽

Frequency Drift ◽

Chemical Exchange Saturation Transfer ◽

Saturation Transfer ◽

Drift Correction ◽

Time Frequency

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Different Real-Time PCR Formats Compared for the Quantitative Detection of Human Cytomegalovirus DNA

Clinical Chemistry ◽

10.1093/clinchem/45.11.1932 ◽

1999 ◽

Vol 45 (11) ◽

pp. 1932-1937 ◽

Cited By ~ 65

Author(s):

Andreas Nitsche ◽

Nina Steuer ◽

Christian Andreas Schmidt ◽

Olfert Landt ◽

Wolfgang Siegert

Keyword(s):

Real Time ◽

Human Cytomegalovirus ◽

Real Time Pcr ◽

Detection System ◽

Quantitative Detection ◽

Fluorescence Signal ◽

Hybridization Probe ◽

Sequence Detection ◽

Hybridization Probes ◽

Assay Time

Abstract Background: The aim of this study was to compare the ABI PRISM 7700 Sequence Detection System and the LightCycler to develop a quantitative real-time PCR assay for the detection of human cytomegalovirus (HCMV) DNA suitable for routine hospital application. Methods: We used one exonuclease probe and five different hybridization probe sets as sequence-specific fluorescence detection formats. For the exonuclease assay and two hybridization probe sets, reproducibility and the detection limit were determined. To keep the total assay time to a minimum, we gradually shortened individual reaction steps on both instruments. Results: The exonuclease assay can be interchangeably performed on the 7700 and the LightCycler. No change of reaction conditions is required, except for the addition of bovine serum albumin to the LightCycler reaction. The shortest possible total assay time is 80 min for the ABI PRISM 7700 Sequence Detection System and 20 min for the LightCycler. When the LightCycler is used, the exonuclease probe can be replaced by a set of hybridization probes. All assays presented here detected HCMV DNA in a linear range from 101 to 107 HCMV genome equivalents/assay (r >0.995) with low intraassay (<5%) and interassay (<10%) variation. Conclusions: The ABI PRISM 7700 Sequence Detection System as well as the LightCycler are useful instruments for rapid and precise online PCR detection. Moreover, the two principles of fluorescence signal production allow HCMV quantification with the same accuracy.

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Infrastructure-Free Indoor Pedestrian Tracking with Smartphone Acoustic-Based Enhancement

Sensors ◽

10.3390/s19112458 ◽

2019 ◽

Vol 19 (11) ◽

pp. 2458 ◽

Cited By ~ 1

Author(s):

Chao Liu ◽

Sining Jiang ◽

Shuo Zhao ◽

Zhongwen Guo

Keyword(s):

Doppler Effect ◽

Location Estimation ◽

Location Based Services ◽

Estimation Accuracy ◽

Measurement Unit ◽

Average Error ◽

Pedestrian Tracking ◽

Tracking Accuracy ◽

Acoustic Frequency ◽

Indoor Pedestrian Tracking

Indoor pedestrian tracking has been identified as a key technology for indoor location-based services such as emergency locating, advertising, and gaming. However, existing smartphone-based approaches to pedestrian tracking in indoor environments have various limitations including a high cost of infrastructure constructing, labor-intensive fingerprint collection, and a vulnerability to moving obstacles. Moreover, our empirical study reveals that the accuracy of indoor locations estimated by a smartphone Inertial Measurement Unit (IMU) decreases severely when the pedestrian is arbitrarily wandering with an unstable speed. To improve the indoor tracking performance by enhancing the location estimation accuracy, we exploit smartphone-based acoustic techniques and propose an infrastructure-free indoor pedestrian tracking approach, called iIPT. The novelty of iIPT lies in the pedestrian speed reliability metric, which characterizes the reliability of the pedestrian speed provided by the smartphone IMU, and in a speed enhancing method, where we adjust a relatively less reliable pedestrian speed to the more reliable speed of a passing by “enhancer” based on the acoustic Doppler effect. iIPT thus changes the encountered pedestrians from an“obstacle” into an “enhancer.” Extensive real-world experiments in indoor scenarios have been conducted to verify the feasibility of realizing the acoustic Doppler effect between smartphones and to identify the applicable acoustic frequency range and transmission distance while reducing battery consumption. The experiment results demonstrate that iIPT can largely improve the tracking accuracy and decrease the average error compared with a conventional IMU-based method.

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A Real-Time Sequence Detection Algorithm for Floating Point Unit Design

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.687-691.3494 ◽

2014 ◽

Vol 687-691 ◽

pp. 3494-3497

Author(s):

Wei Sun ◽

Jun She An ◽

Shuang Yang

Keyword(s):

Fixed Point ◽

Real Time ◽

Detection Algorithm ◽

Time Sequence ◽

Floating Point ◽

Design Data ◽

Sequence Detection ◽

Unit Design ◽

Floating Point Unit ◽

Short Time

Sequence detection is used in many algorithms and applications. Sequences are different depending on different demands. In the process of floating-point CORDIC coprocessor design,data are need to change from floating point format to fixed point format. This process is necessary to detect the number of consecutive zeros. We design the leading-zero-counting algorithm to achieve this function, and this conversion process is completed in a very fixed short time, to ensure the needs of the floating point CORDIC coprocessor.

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