scholarly journals A New Approach Customizable Distributed Network Service Discovery System

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Xiangzhan Yu ◽  
Zhichao Hu ◽  
Yi Xin
Keyword(s):  
Private Information ◽  
Service Discovery ◽  
Vehicular Networks ◽  
Scanning Speed ◽  
Network Services ◽  
Distributed Network ◽  
Network Service ◽  
Discovery System ◽  
Service Information ◽  
High Scanning Speed

Computer systems and applications on the internet provide services to outsiders and, at the same time, the vulnerabilities may be exploited by attackers and leak some sensitive private information. To collect and monitor the service information provided by the network environment such as IoT (Internet of Things), vehicular networks, cloud computing, and cloud storage, it is particularly important that a system can provide faster service discovery for discovering and identifying specific network services. The current service discovery systems mainly use port scanning technology, including Nmap, Zmap, and Masscan. However, these technologies hard code the service features and only support common services so that cannot cope with real-time updates and changing network services. To solve the above problems, this paper proposed a customizable distributed network service discovery system based on stateless scanning technology of Masscan and proposed a customizable interactive pattern set syntax. The system used random destination address technologies to scan for Ipv4 address allocation and used a distributed deployment scheme. Experimental results show that the system has high scanning speed and has high adaptability to new services and special services.

Network Services

2015 ◽  
pp. 242-262
Keyword(s):  
Genetic Algorithms ◽  
Remote Control ◽  
Service Discovery ◽  
Network Protocols ◽  
Control Device ◽  
Service Performance ◽  
Network Services ◽  
Network Service ◽  
Electrical Device ◽  
Universal Controller

A novel framework formed from a collection of independent agents that interact with each other is determined to provide a network service. Agents in this structure have the capability to perform independent activities such as duplication, migration, etc. A new method is developed in this chapter by means of genetic algorithms to change the behavior of agents over peers and also to improve the network service performance in a distributed and well planned way. Architecture with a remote control device, Personal Universal Controller (PUC), is described. The PUC provides two-way communication with the applications for copying specification for its functionality and constructing an interface for monitoring that electrical device. The requirements of every application hold the information about its dependency information and availability of appliance conditions. The network protocols, such as Service Discovery Protocols, are explained with their types and functionality.

scholarly journals Time efficient laser modification of steel surfaces for advanced bonding in hybrid materials

2020 ◽  
Author(s):  
D. Voswinkel ◽  
D. Kloidt ◽  
O. Grydin ◽  
M. Schaper
Keyword(s):  
Adhesive Bonding ◽  
Scanning Speed ◽  
Laser Source ◽  
Lap Shear ◽  
Carbon Fibre Reinforced Polymer ◽  
Bonding Properties ◽  
Fibre Reinforced Polymer ◽  
Yvo4 Laser ◽  
Steel Surfaces ◽  
High Scanning Speed

AbstractLaser surface treatment of metals is one option to improve their properties for adhesive bonding. In this paper, a pulsed YVO4 Laser source with a wavelength of 1064 nm and a maximum power of 25 W was utilized to increase the surface area of the steel HCT490X in order to improve its bonding properties with a carbon fibre reinforced polymer (CFRP). Investigated was the influence of the scanning speed of the laser source on the bonding properties. For this purpose, the steel surfaces were ablated at a scanning speed between 1500 and 4500 mm/s. Afterwards the components were bonded with the adhesive HexBond™ 677. After lap shear tests were carried out on the specimen, the surfaces were inspected using scanning electron microscopy (SEM). The experiments revealed that the bonding quality can be improved with a high scanning speed, even when the surface is not completely ablated.

Evaluating Situation Assessment in Distributed Network Electricity Control

2020 ◽  
Vol 64 (1) ◽  
pp. 263-267
Author(s):  
Mark W.Wiggins ◽  
Jaime Auton ◽  
Daniel Sturman
Keyword(s):  
Service Providers ◽  
Network Control ◽  
Distributed Network ◽  
Network Service ◽  
Situation Assessment ◽  
Network Service Provider ◽  
Remedial Strategies ◽  
Control Operators ◽  
Organisational Level ◽  
Three Phases

Situation assessment is a critical skill amongst electricity distribution controllers but can be difficult to assess in practice. In the present research, we adapted a psychometric approach based on the principle that expert situation assessment engages cue-based associations from memory. Using consortium norming, we acquired performance data from 320 network control operators for five network control-related tasks that comprised the electricity network service provider edition of the EXPERT Intensive Skills Evaluation (EXPERTise 2.0) software. Operators were distributed across 11 Distributed Network Service Providers (DNSP), with data collected over three phases. Data were examined across the three phases of data collection and suggest that DNSPs can monitor the situation assessment of network controllers at an individual and at an organisational level, affording the opportunity to identify changes in performance and implement remedial strategies as appropriate.

Distributed and Adaptive Service Discovery Using Preference

2010 ◽  
pp. 396-424
Author(s):  
Ryota Egashira ◽  
Akihiro Enomoto ◽  
Tatsuya Suda
Keyword(s):  
Service Discovery ◽  
Service Providers ◽  
End Users ◽  
Research Community ◽  
End User ◽  
Network Service ◽  
Preference Information ◽  
Extensive Simulation ◽  
Service Oriented Computing ◽  
Service Oriented

In Service-Oriented Computing, service providers publish their services by deploying service components which implement those services into a network. Since such services are distributed around the network, Service-Oriented Computing requires the functionality to discover the services that meet certain criteria specified by an end user. In order to overcome the scalability issue that the current centralized discovery mechanism inherently has, distributed discovery mechanisms that the P2P research community has developed may be promising alternatives. This chapter outlines existing distributed mechanisms and proposes a novel discovery mechanism that utilizes end users’ preferences. The proposed mechanism allows end users to return their feedback that describes the degree of the preference for discovered services. The returned preference information is stored at nodes and utilized to decide where to forward subsequent queries. The extensive simulation demonstrates that the proposed mechanism meets key requirements such as selectivity, efficiency and adaptability.

Acquiring the Gist of Social Network Service Threads via Comparison with Wikipedia

2011 ◽  
Vol 7 (2) ◽  
pp. 17-28
Author(s):  
Akiyo Nadamoto ◽  
Eiji Aramaki ◽  
Takeshi Abekawa ◽  
Yohei Murakami
Keyword(s):  
Social Network ◽  
Network Services ◽  
Network Service ◽  
Social Network Service ◽  
Multiple Users ◽  
Social Network Services

Internet-based social network services (SNSs) have grown increasingly popular and are producing a great amount of content. Multiple users freely post their comments in SNS threads, and extracting the gist of these comments can be difficult due to their complicated dialog. In this paper, the authors propose a system that explores this concept of the gist of an SNS thread by comparing it with Wikipedia. The granularity of information in an SNS thread differs from that in Wikipedia articles, which implies that the information in a thread may be related to different articles on Wikipedia. The authors extract target articles on Wikipedia based on its link graph. When an SNS thread is compared with Wikipedia, the focus is on the table of contents (TOC) of the relevant Wikipedia articles. The system uses a proposed coverage degree to compare the comments in a thread with the information in the TOC. If the coverage degree is higher, the Wikipedia paragraph becomes the gist of the thread.

scholarly journals Competition of Duopoly MVNOs for IoT Applications through Wireless Network Virtualization

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Wanli Zhang ◽  
Xianwei Li ◽  
Liang Zhao ◽  
Xiaoying Yang
Keyword(s):  
Radio Frequency ◽  
Wireless Network ◽  
Network Performance ◽  
Stackelberg Game ◽  
Network Virtualization ◽  
Network Services ◽  
Network Service ◽  
Iot Applications ◽  
Wireless Network Virtualization ◽  
Iot Devices

Network performance is of great importance for processing Internet of Things (IoT) applications in the fifth-generation (5G) communication system. With the increasing number of the devices, how network services should be provided with better performances is becoming a pressing issue. The static resource allocation of wireless networks is becoming a bottleneck for the emerging IoT applications. As a potential solution, network virtualization is considered a promising approach to enhancing the network performance and solving the bottleneck issue. In this paper, the problem of wireless network virtualization is investigated where one wireless infrastructure provider (WIP), mobile virtual network operators (MVNOs), and IoT devices coexist. In the system model under consideration, with the help of a software-defined network (SDN) controller, the WIP can divide and reconfigure its radio frequency bands to radio frequency slices. Then, two MVNOs, MVNO1 and MVNO2, can lease these frequency slices from the WIP and then provide IoT network services to IoT users under competition. We apply a two-stage Stackelberg game to investigate and analyze the relationship between the two MVNOs and IoT users, where MVNO1 and MVNO2 firstly try to maximize their profits by setting the optimal network service prices. Then, IoT users make decisions on which network service they should select according to the performances and prices of network services. Two competition cases between MVNO1 and MVNO2 are considered, namely, Stackelberg game (SG) where MVNO1 is the leader whose price of network service is set firstly and MVNO2 is the follower whose network service price is set later and noncooperative strategic game (NSG) under which the service prices of MVNO1 and MVNO2 are simultaneously set. Each IoT user decides whether and which MVNO to select on the basis of the network service prices and qualities. The numerical results are provided to show the effectiveness of our game model and the proposed solution method.

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