In P2P systems, large volumes of data are declustered naturally across a large number of peers. But it is very difficult to control the initial data distribution
Machine tools are used to manufacture components with desired size, shape, and surface finish. The accuracy of machining is influenced by stiffness, structural damping, and long-term dimensional stability of the machine tool structures. Components machined using such machines exhibit more dimensional variations because of the excessive vibration during machining at higher speeds. Compared to conventional materials like cast iron, stone-based polymer composites such as epoxy granite have been found to provide improved damping characteristics, by seven to ten folds, due to which they are being considered for machine tool structures as alternate materials. The stiffness of structures made of epoxy granite can be enhanced by reinforcing with structural steel. The current work highlights the design and analysis of different steel reinforcements in the lathe bed made of the epoxy granite composite to achieve equivalent stiffness to that of cast iron bed for improved static and dynamic performances of the CNC lathe. A finite element model of the existing the cast iron bed was developed to evaluate the static (torsional rigidity) and dynamic characteristics (natural frequency) and the results were validated using the experimental results. Then finite element models of five different steel reinforcement designs of the epoxy granite bed were developed, and their static and dynamic behaviors were compared with the cast iron bed through numerical simulation using finite element analysis. The proposed design (Design-5) of the epoxy granite bed is found to have an improvement in dynamic characteristics by 4–10% with improved stiffness and offers a mass reduction of 22% compared to the cast iron bed, hence it can be used for the manufacture of the CNC lathe bed and other machine tool structures for enhanced performance.
<p>With the recent advancement of software development methodologies and frameworks, service meshes has been to rapidly gain the lime light. In this paper, we provide an introduction to service meshes and discuss their key use cases in modern cloud-native architectures. We also explore the challenges associated with performance analysis of service meshes and present a survey of recent research in this area. To address these challenges, we propose the use of soft computing techniques for performance analysis of service meshes. Our study includes a comparative analysis of different service mesh platforms and their performance under varying workloads. Overall, this paper provides insights into the benefits and limitations of service meshes and highlights the importance of performance analysis in ensuring the reliability and scalability of micro-services based applications.</p>
In peer-to-peer content distribution the lack of a central authority makes authentication difficult.
Without authentication, adversary nodes can spoof identity and falsify messages in the overlay. This enables malicious nodes to launch man-in-the-middle or denial-of-service attacks. In this paper, we present a trust based content distribution for peer-to-peer overlay networks, which is built on the trust management scheme. The main concept is, before sending or accepting the traffic, the trust of the peer must be validated. Based on the success of data delivery and searching time, we calculate the trust index of a node. Then the aggregated trust index of the peers whose value is below the threshold value is considered as distrusted and the corresponding traffic is blocked. By simulation results we show that our proposed scheme achieves increased success ratio with reduced delay and drop.
SummaryVehicular ad‐hoc networks (VANETs) depends on organizing the vehicles as versatile hubs in order to obtain a correspondence arrangement. The arrangement of vehicular specially appointed systems does not just encourage novel telematics applications. The selection of dynamic well‐being application raises new dangers to street well‐being if security issues are not appropriately taken care of. An extraordinary dynamic security application is observed as an empowerment to anticipate the passing trade in threat alerts which depends on singular perceptions. VANET is considered by many specialist co‐ops in urban situations. Where the communicate tempest will corrupt the guiding performance. The issue is addressed and examined by various protocols such as AODV, DSR, DYMO, TORA, and TIHOO. The proposed AESP‐VANET (Advanced and enhanced security protocol for VANET) is an upgraded security version which is developed using improved fluffy and cukoo search algorithm. The steady state between the source and destination hub is considered to deal the location issues in the network. The disclosure of the courses is restricted by AESP‐VANET using fuzzy framework and it constrains the messages which requires the course request. The improved cuckoo calculation in hybrid methodology, which is one of the best meta calculations particularly in the huge inquiry space, brilliantly chooses the most steady and ideal course among realized courses by computing an upgraded wellness work. AESP‐VANET gives out the result using Network Simulator 2. This shows a tremendous improvement in the throughput, overhead, and many more parameters.
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