Assessment of information efficiency of error-correcting codes in Plotkin bound

In this article, the authors investigate the enhanced two stage MMSE (TS-MMSE) equalizer in bit-interleaved coded FBMC/OQAM system which gives a tradeoff between complexity and performance, since error correcting codes limits error propagation, so this allows the equalizer to remove not only ICI but also ISI in the second stage. The proposed equalizer has shown less design complexity compared to the other MMSE equalizers. The obtained results show that the probability of error is improved where SNR gain reaches 2 dB measured at BER compared with ICI cancellation for different types of modulation schemes and ITU Vehicular B channel model. Some simulation results are provided to illustrate the effectiveness of the proposed equalizer.

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Error-Correcting Codes in Projective Spaces Via Rank-Metric Codes and Ferrers Diagrams

IEEE Transactions on Information Theory ◽

10.1109/tit.2009.2021376 ◽

2009 ◽

Vol 55 (7) ◽

pp. 2909-2919 ◽

Cited By ~ 99

Author(s):

Tuvi Etzion ◽

Natalia Silberstein

Keyword(s):

Projective Spaces ◽

Error Correcting Codes ◽

Rank Metric ◽

Rank Metric Codes ◽

Ferrers Diagrams

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Perceived Efficiency Outcomes, Sources and Awareness of Online Health Information among the Elderly during COVID-19

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18158121 ◽

2021 ◽

Vol 18 (15) ◽

pp. 8121

Author(s):

Gizell Green ◽

Riki Tesler ◽

Cochava Sharon

Keyword(s):

Health Status ◽

Health Information ◽

The Elderly ◽

Cross Sectional Study ◽

Online Health Information ◽

Online Information ◽

Safety Skills ◽

Cross Sectional ◽

Information Efficiency ◽

Online Sources

The Internet and social media are crucial platforms for health information. Factors such as the efficiency of online health information, the outcomes of seeking online health information and the awareness of reliable sources have become increasingly important for the elderly during the COVID-19 pandemic. This study aimed to examine differences between elderly individuals’ income above and below the average monthly wage in relation to their online health information efficiency and the outcomes of seeking online health information; to evaluate types of online information sources with online health information efficiency and the outcomes of seeking online health information; and to explore online health information efficiency as a mediator between health status and awareness of online sources. A cross-sectional study design was conducted with 336 elderly participants age 65 or older. The participants volunteered to complete a questionnaire. No differences were found between the two groups regarding efficiency in retrieving health information from official online health sites and Google. Perceived efficiency mediated health status and awareness of online sources. In these challenging times, it is important to provide a tailor-made education strategy plan for reliable sources of online health information for the elderly, in order to enhance their technology safety skills. It is also important to explore other mediating variables between health status and awareness of online sources.

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4D BIM for Construction Logistics Management

CivilEng ◽

10.3390/civileng2020018 ◽

2021 ◽

Vol 2 (2) ◽

pp. 325-348

Author(s):

Kane Whitlock ◽

Fonbeyin Henry Abanda ◽

Marcelline Blanche Manjia ◽

Chrispin Pettang ◽

George Elambo Nkeng

Keyword(s):

Three Dimensional ◽

Qualitative Interview ◽

Logistics Management ◽

Project Delivery ◽

Building Information Modelling ◽

Layout Planning ◽

Information Efficiency ◽

Site Layout ◽

Building Information ◽

Common User

This study presents an investigation into the extent to which emerging building information modelling (BIM) can be applied to construction logistics management (CLM). Given the specialist nature of the domains, the study employed an in-depth qualitative interview, whereby six experts were interrogated about their experiences of BIM for CLM. The study found the main applications of BIM on CLM to be the creation of three-dimensional (3D) site layout plans and four-dimensional (4D) coordination of site processes and common user plant, updating the 4D logistics plan as the project progressed and collaboration in BIM-based logistics coordination. Furthermore, there was a consensus amongst interviewees on improvement in site safety, comprehension of logistics information, efficiency on site, and effectiveness of layout planning as the main benefits. Lastly, the lack of training with implications on understanding was one of the main barriers to applying BIM to CLM. The findings from this study have the potential to stimulate the uptake of BIM by construction logistics practitioners. By so doing, the performance construction project delivery can be improved, and waste can be minimised or eliminated.

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A robust and high capacity data hiding method for JPEG compressed images with SVD-based block selection and advanced error correcting techniques

Journal of Intelligent & Fuzzy Systems ◽

10.3233/jifs-189877 ◽

2021 ◽

pp. 1-11

Author(s):

Kusan Biswas

Keyword(s):

Data Hiding ◽

High Capacity ◽

Error Correcting Codes ◽

Human Vision ◽

Data Embedding ◽

Compressed Images ◽

Matrix Encoding ◽

Dct Coefficients ◽

Capacity Data ◽

Value Decomposition

In this paper, we propose a frequency domain data hiding method for the JPEG compressed images. The proposed method embeds data in the DCT coefficients of the selected 8 × 8 blocks. According to the theories of Human Visual Systems (HVS), human vision is less sensitive to perturbation of pixel values in the uneven areas of the image. In this paper we propose a Singular Value Decomposition based image roughness measure (SVD-IRM) using which we select the coarse 8 × 8 blocks as data embedding destinations. Moreover, to make the embedded data more robust against re-compression attack and error due to transmission over noisy channels, we employ Turbo error correcting codes. The actual data embedding is done using a proposed variant of matrix encoding that is capable of embedding three bits by modifying only one bit in block of seven carrier features. We have carried out experiments to validate the performance and it is found that the proposed method achieves better payload capacity and visual quality and is more robust than some of the recent state-of-the-art methods proposed in the literature.

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