layered design
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Axioms ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 27
Author(s):  
Song-Kyoo (Amang) Kim

The research designs a new integrated system for the security enhancement of a decentralized network by preventing damages from attackers, particularly for the 51 percent attack. The concept of multiple layered design based on Blockchain Governance Games frameworks could handle multiple number of networks analytically. The Multi-Layered Blockchain Governance Game is an innovative analytical model to find the best strategies for executing a safety operation to protect whole multiple layered network systems from attackers. This research fully analyzes a complex network with the compact mathematical forms and theoretically tractable results for predicting the moment of a safety operation execution are fully obtained. Additionally, simulation results are demonstrated to obtain the optimal values of configuring parameters of a blockchain-based security network. The Matlab codes for the simulations are publicly available to help those whom are constructing an enhanced decentralized security network architecture through this proposed integrated theoretical framework.


Author(s):  
Lokesh S ◽  
Jayasri B. S

A Cross Layered framework is an important concept in today’s world given the abundant usage of both single-path and multi path wireless network architectures. One of the important design issues in the development of a robust framework such as this is the design of an Optimization Agent or an OA. In recent days of wireless and wired ad-hoc networks, cross-layer design was brought about a few years back to explore attached optimization at different layers. In order to describe solutions in cross-layered design, the Open System Intercommunications model was employed. However, it is clear that no voice and reference mechanism exists to aid optimization, which could effectively halt effective adaptability and deployment of cross-layered solutions. In this study, we suggest some hypotheses regarding how to model and create cross-layer solutions using the OSI layered method. We use the aforementioned method to analyse and simulate a particular type of cross-layered solution, namely energy-aware routing protocols. We use a layered approach to examine two proposals that are accessible in the literature. The applied strategy leads to the creation of an energy- aware, one-of-a-kind solution that outperforms prior versions and provides interesting and clear insights into the function that each layer plays in the overall optimization process. The network throughput, utilization, and reliability have all increased practically rapidly in the last few years. With the emergence of broadband wireless and wired cellular networks, as well as mobile adhoc networks (MANETs) and improved computational capacity, a new generation of apps, especially real-time multimedia applications, has emerged. Delivering real-time multimedia traffic across a sophisticated network like the Internet could be a particularly difficult undertaking, as these applications have stringent bandwidth and other quality-of-service (QoS) requirements.


Author(s):  
Fabiana Di Porto

AbstractDuring the past decade, a small but rapidly growing number of Law&Tech scholars have been applying algorithmic methods in their legal research. This Article does it too, for the sake of saving disclosure regulation failure: a normative strategy that has long been considered dead by legal scholars, but conspicuously abused by rule-makers. Existing proposals to revive disclosure duties, however, either focus on the industry policies (e.g. seeking to reduce consumers’ costs of reading) or on rulemaking (e.g. by simplifying linguistic intricacies). But failure may well depend on both. Therefore, this Article develops a `comprehensive approach', suggesting to use computational tools to cope with linguistic and behavioral failures at both the enactment and implementation phases of disclosure duties, thus filling a void in the Law & Tech scholarship. Specifically, it outlines how algorithmic tools can be used in a holistic manner to address the many failures of disclosures from the rulemaking in parliament to consumer screens. It suggests a multi-layered design where lawmakers deploy three tools in order to produce optimal disclosure rules: machine learning, natural language processing, and behavioral experimentation through regulatory sandboxes. To clarify how and why these tasks should be performed, disclosures in the contexts of online contract terms and privacy online are taken as examples. Because algorithmic rulemaking is frequently met with well-justified skepticism, problems of its compatibility with legitimacy, efficacy and proportionality are also discussed.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhenzhong Yu ◽  
Zhong Yang ◽  
Yan Zhang ◽  
Yizhi Wang ◽  
Xingliu Hu ◽  
...  

AbstractThe illusion device developed from the scattering cancellation employs very simple homogeneous and isotropic materials, but this device is only valid for electrically small objects. In this paper, we prove that the illusion device optimized by genetic algorithm can be applied to large-scale occasions. For an electrically small target, an optimized core–shell illusion device can achieve better illusion effect than the analytical design based on the scattering cancellation. With the increase of the device size, the ability of the single-layered shell to manipulate the scattering is very limited. For a moderate-size target, two optimized multi-layered examples are presented: one is to make a dielectric cylinder appear as another dielectric target, and the other is to make a conducting cylinder behave like a double-negative-material target. The full-wave simulations are carried out to visualize the similar field distributions of the target and the optimized multi-layered design. This optimized design greatly widens the size application range of the illusion device and can also improve the illusion performance with simple material parameters.


Author(s):  
Angélica Rocío SERRANO-FARFÁN ◽  
Alejandra NIVÓN-PELLÓN

Disposable diapers are the modern solution to keep babies' skin dry and clean since they are efficient, a single diaper can keep a baby clean and dry for up to eight hours and they are effective due to the manufacturing materials that are waterproof, flexible, resistant and highly absorbent. While these are advantages to the layered design of the disposable diaper, they become barriers that prevent degradation. In Mexico, 14% of the solid waste generated corresponds to this waste. In the present work, a systematic and exhaustive review is made of the trends, regulations, and regulations that govern the commercialization and possible improvements to the disposable diaper considered a product whose usability is highly accepted and disseminated. The foregoing to prospect the development of this product and orient it towards a more sustainable future to manage the relevant innovations and changes in the regulations that correspond to disposable diapers in the framework of development: social, economic, and environmental that raises the 2030 agenda.


2021 ◽  
Vol 6 (53) ◽  
pp. eabf5116
Author(s):  
Ke Liu ◽  
Felix Hacker ◽  
Chiara Daraio

Continuous and controlled shape morphing is essential for soft machines to conform, grasp, and move while interacting safely with their surroundings. Shape morphing can be achieved with two-dimensional (2D) sheets that reconfigure into target 3D geometries, for example, using stimuli-responsive materials. However, most existing solutions lack the ability to reprogram their shape, face limitations on attainable geometries, or have insufficient mechanical stiffness to manipulate objects. Here, we develop a soft, robotic surface that allows for large, reprogrammable, and pliable shape morphing into smooth 3D geometries. The robotic surface consists of a layered design composed of two active networks serving as artificial muscles, one passive network serving as a skeleton, and cover scales serving as an artificial skin. The active network consists of a grid of strips made of heat-responsive liquid crystal elastomers (LCEs) containing stretchable heating coils. The magnitude and speed of contraction of the LCEs can be controlled by varying the input electric currents. The 1D contraction of the LCE strips activates in-plane and out-of-plane deformations; these deformations are both necessary to transform a flat surface into arbitrary 3D geometries. We characterize the fundamental deformation response of the layers and derive a control scheme for actuation. We demonstrate that the robotic surface provides sufficient mechanical stiffness and stability to manipulate other objects. This approach has potential to address the needs of a range of applications beyond shape changes, such as human-robot interactions and reconfigurable electronics.


2021 ◽  
Vol 58 (2) ◽  
pp. 6544-6560
Author(s):  
Dr. B. Sundaravadivazhagan, Dr. B. Subashini, Mr. Mohemed Ashik M

In the present scenario, Internet of Things is playing vital role in the next era of communication. The IOT applications like smart cities, smart houses, smart livestock, smart health care, smart climate etc.It can be lead to many security challenges and issues. The aim of this survey focus on the main objective of the security challenges and issues in the data privacy, security, confidentiality, integrity, availability, access control, encryption, default password, malware and ransom, botnet, phishing, cloud, routing and trust management and discussed recovery from mention security defies. This study has detailed review of IoT layered design, each of these layers having lot of security challenges such as threats, vulnerabilities and attacks. Understanding these challenges and associated countermeasures mechanism with the help of the secure routing.          


Author(s):  
A. B. Sulin ◽  
D. V. Evdulov ◽  
A. M. Ibragimova ◽  
A. I. Semilyak

Objective. The objective of the study is to develop a design model of the electronic equipment cooling system based on the combined use of high-current thermoelectric semiconductor batteries of layered design and an evaporative-condensing thermal thermosyphon, as well as to study the thermophysical processes occurring during its operation.Methods. A mathematical model of the electronic equipment cooling system based on the combined use of high-current layered thermoelectric batteries and an evaporative-condensing thermal thermosyphon is presented. The design model includes a description of heat exchange processes in a layered thermoelectric element at various supply currents, determination of the amount of heat transferred through the cross-section of the channel of a thermal thermosyphon per unit of time, and the temperature values at each channel point.Result. A 2D dynamic heat conduction problem is solved for a complex system with rectangular geometry of fragments and heat sources. The temperature distribution of a thermoelement along its longitudinal axis at different values of the supply current and the change in the heat flow along its length in a thermal evaporation-condensation thermosyphon are studied.Conclusion. The results of the research have shown the effectiveness of combined use of high-current layered thermoelectric batteries and a thermal thermosyphon in electronic equipment with dense element packaging. It is shown that to increase the efficiency of electronic equipment and reduce the heat losses that occur in the heat line when the heat-generating element of radio-electronic equipment and thermoelectric semiconductor batteries are separated by a sufficiently large distance (over 0.6 m), it is advisable to use an evaporative-condensing thermal thermosyphon as a heat line.


Soft Robotics ◽  
2020 ◽  
Vol 7 (5) ◽  
pp. 649-662
Author(s):  
Gal Tibi ◽  
Ela Sachyani Keneth ◽  
Michael Layani ◽  
Shlomo Magdassi ◽  
Amir Degani

Author(s):  
D. Ramirez Cardona ◽  
H. Di Benedetto ◽  
C. Sauzeat ◽  
N. Calon ◽  
J. G. Rose

International rail authorities in several countries, primarily in Western Europe and Asia, have been actively involved with the development and application of asphalt trackbeds for more than 40 years. In this paper, representative activities and standards for trackbeds in countries involved with significant asphalt trackbed design and construction are described. The most common identified use of this technique consists of building asphalt subballast layers as a (partial) replacement for unbound granular material (UGM) subballast. This has been primarily associated with the construction of new high-speed lines (HSL), where the used asphalt mix is similar to those used for highway base courses. Most countries specify a layered design for the track support layers. This involves setting specific standards for individual layer thickness and bearing capacity depending on traffic characteristics. Some other identified uses include asphalt slab tracks and even sleeperless and ballastless track systems where the rail is embedded in an asphalt slab. The presented use cases in this paper account for the advantages and important considerations in relation to the use of asphalt in layered track designs. Even though some countries have adopted asphalt layers as a standard component of their track systems, more information is needed to develop a rational and optimized design method and maintenance protocols of asphalt subballast layers; thus, the importance of the data collected from instrumented track sections and information introduced in this paper.


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