scholarly journals A novel zero-watermarking scheme based on NSCT-SVD and blockchain for video copyright

Author(s):  
Xiangqi Wu ◽  
Peng Ma ◽  
Zihan Jin ◽  
Yuxuan Wu ◽  
Wei Ou ◽  
...  

Abstract With the advent of information era, issues about video copyright continue to emerge. In the grey industrial chain of piracy, the film industry is a major disaster area so far. The current protection schemes for video copyright are inefficient and costly so that video industry still has to face the infringement. Research on a simple and efficient protection technology of video copyright is urgent. To address the inefficiency and irregularity of the current protection schemes for video copyright, this paper proposes a simple and efficient protection scheme for video copyright based on video zero-watermarking and blockchain. The results show that key-frames extraction and key-frames zero-watermarking based on NSCT-SVD in the proposed video zero-watermarking algorithm perform well and achieve low-cost protection for video copyright in practical environment. In addition, video zero-watermarking algorithm of proposed scheme works well with blockchain. Proposed scheme improves some extent on database centralization and evidential difficulties of traditional video zero-watermarking schemes, and it is more reliable, simpler and more effective than traditional video zero-watermarking schemes without blockchain. Keywords: Video copyright, Blockchain, Zero-watermarking, Privacy, Key-frames extraction

2021 ◽  
Author(s):  
Xiangqi Wu ◽  
Peng Ma ◽  
Zihan Jin ◽  
Yuxuan Wu ◽  
Wei Ou ◽  
...  

Abstract With the advent of information era, issues about video copyright continue to emerge. In the grey industrial chain of piracy, the film industry is a major disaster area so far. The current protection schemes for video copyright are inefficient and costly so that video industry still has to face the infringement. Research on a simple and efficient protection technology of video copyright is urgent. To address the inefficiency and irregularity of the current protection schemes for video copyright, this paper proposes a simple and efficient protection scheme for video copyright based on zero-watermarking and blockchain. The results show that the proposed key-frames extraction method of proposed scheme performs well and achieves low-cost protection of video copyright in pratical environment. In addition, video zero-watermarking algorithm of proposed scheme works well with blockchain. Proposed scheme improves some extent on the database centralization and evidential difficulties of traditional video zero-watermarking schemes, and it is more reliable, simpler and more effective than traditional video zero-watermarking schemes.


Author(s):  
Karan S Belsare ◽  
Gajanan D Patil

A low cost and reliable protection scheme has been designed for a three phase induction motor against unbalance voltages, under voltage, over voltage, short circuit and overheating protection. Taking the cost factor into consideration the design has been proposed using microcontroller Atmega32, MOSFETs, relays, small CTs and PTs. However the sensitivity of the protection scheme has been not compromised. The design has been tested online in the laboratory for small motors and the same can be implemented for larger motors by replacing the i-v converters and relays of suitable ratings.


2019 ◽  
Vol 9 (4) ◽  
pp. 642 ◽  
Author(s):  
Xu Xi ◽  
Xinchang Zhang ◽  
Weidong Liang ◽  
Qinchuan Xin ◽  
Pengcheng Zhang

Digital watermarking is important for the copyright protection of electronic data, but embedding watermarks into vector maps could easily lead to changes in map precision. Zero-watermarking, a method that does not embed watermarks into maps, could avoid altering vector maps but often lack of robustness. This study proposes a dual zero-watermarking scheme that improves watermark robustness for two-dimensional (2D) vector maps. The proposed scheme first extracts the feature vertices and non-feature vertices of the vector map with the Douglas-Peucker algorithm and subsequently constructs the Delaunay Triangulation Mesh (DTM) to form a topological feature sequence of feature vertices as well as the Singular Value Decomposition (SVD) matrix to form intrinsic feature sequence of non-feature vertices. Next, zero-watermarks are obtained by executing exclusive disjunction (XOR) with the encrypted watermark image under the Arnold scramble algorithm. The experimental results show that the scheme that synthesizes both the feature and non-feature information improves the watermark capacity. Making use of complementary information between feature and non-feature vertices considerably improves the overall robustness of the watermarking scheme. The proposed dual zero-watermarking scheme combines the advantages of individual watermarking schemes and is robust against such attacks as geometric attacks, vertex attacks and object attacks.


2021 ◽  
Vol 64 (3) ◽  
pp. 185-193
Author(s):  
Jelena Ristić ◽  
Miloš Vučinić ◽  
Danilo Ristić ◽  
Milutin Vučinić

Extensive analytical and experimental research has been done by the authors directed to mitigation of the effects of earthquakes on structures. The research results mainly represent parts of the realized several related international projects. A selected part of the analytical studies directed to comparison between conventional and seismically isolated frame structures is presented in this paper. The responses of the applied newely developed advanced seismic isolation system HC-RMS-GOSEB to the simulated input excitation of three representative earthquakes of intensity 0.50g, have shown that it is very effective for construction of vibro-isolated and seismically resistant buildings, providing activated multistage seismic response and globally optimized seismic energy balance. Its application achieves an increase in the vibration period of the structure, far enough from the dominant period of seismic excitation. The results of the research confirm that this system is a potential solution for achieving low-cost and highly efficient protection of buildings.


2013 ◽  
Vol 72 (3) ◽  
pp. 2469-2495 ◽  
Author(s):  
Shi-Jinn Horng ◽  
Mahmoud E. Farfoura ◽  
Pingzhi Fan ◽  
Xian Wang ◽  
Tianrui Li ◽  
...  

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3018 ◽  
Author(s):  
Knut Oberhagemann ◽  
A. M. Aminul Haque ◽  
Angela Thompson

Protecting against riverbank erosion along the world’s largest rivers is challenging. The Bangladesh Delta, bisected by the Brahmaputra River (also called the Jamuna River), is rife with complexity. Here, an emerging middle-income country with the world’s highest population density coexists with the world’s most unpredictable and largest braided, sand-bed river. Bangladesh has struggled over decades to protect against the onslaught of a continuously widening river corridor. Many of the principles implemented successfully in other parts of the world failed in Bangladesh. To this end, Bangladesh embarked on intensive knowledge-based developments and piloted new technologies. After two decades, successful, sustainable, low-cost riverbank protection technology was developed, suitable for the challenging river conditions. It was necessary to accept that no construction is permanent in this morphologically dynamic environment. What was initially born out of fund shortages became a cost-effective, systematic and adaptive approach to riverbank protection using improved knowledge, new materials, and new techniques, in the form of geobag revetments. This article provides an overview of the challenges faced when attempting to stabilize the riverbanks of the mighty rivers of Bangladesh. An overview of the construction of the major bridge crossings as well as riverbank protection schemes is detailed. Finally, a summary of lessons learned concludes the impressive progress made.


Vaccines ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 9 ◽  
Author(s):  
Theano Lagousi ◽  
Paraskevi Basdeki ◽  
John Routsias ◽  
Vana Spoulou

Non-serotype-specific protein-based pneumococcal vaccines have received extensive research focus due to the limitations of polysaccharide-based vaccines. Pneumococcal proteins (PnPs), universally expressed among serotypes, may induce broader immune responses, stimulating humoral and cellular immunity, while being easier to manufacture and less expensive. Such an approach has raised issues mainly associated with sequence/level of expression variability, chemical instability, as well as possible undesirable reactogenicity and autoimmune properties. A step forward employs the identification of highly-conserved antigenic regions within PnPs with the potential to retain the benefits of protein antigens. Besides, their low-cost and stable construction facilitates the combination of several antigenic regions or peptides that may impair different stages of pneumococcal disease offering even wider serotype coverage and more efficient protection. This review discusses the up-to-date progress on PnPs that are currently under clinical evaluation and the challenges for their licensure. Focus is given on the progress on the identification of antigenic regions/peptides within PnPs and their evaluation as vaccine candidates, accessing their potential to overcome the issues associated with full-length protein antigens. Particular mention is given of the use of newer delivery system technologies including conjugation to Toll-like receptors (TLRs) and reformulation into nanoparticles to enhance the poor immunogenicity of such antigens.


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