telephone networks
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10.29007/s1rd ◽  
2022 ◽  
Author(s):  
Minh Duc Nguyen ◽  
Thai Hien Nguyen

Nowadays in the construction of modem buildings, it is necessary to accommodate pipes and ducts necessary services, such as air conditioning, water supply, sewerage, electricity, computer networks, and telephone networks. Cellular members – steel I‐ shaped structural elements with circular web openings at regular intervals – have been used as beams for more than 35 years now. Although in the past already a large deal of research was performed into the subject of the behavior of cellular beams, almost no attention has been paid to the application of cellular members as columns. The column will be analyzed using the finite element method to calculate the critical load and compared with the Eurocode3 standard, web-post buckling, and frame using cellular member by FEM.


Author(s):  
Sabah S. Al-Fedaghi ◽  
Ghadeer Aldamkhi

In computing, a network generally denotes devices, often referred to as nodes, connected by links. Networks that are modeled with diagrams consist of hundreds of symbols, images, pictures, and icons, such as a computer, a server rack, or a cloud-based storage system. Network representations provide valuable insights into understanding the systems' underlying structures and mechanisms. Nevertheless, this unusually large number of superficial symbols and icons reflects a need for more systematic representations of the interiority of nodes. To give uniformity to this cascade of notions of basic units of nodes in network diagrams, the authors propose adoption of a new modeling methodology, called a thinging (abstract) machine (TM) (abstract machine of things) that represents all notions as a single diagrammatic machine. Because of the large number of network types, in this paper, they specifically and without loss of generality focus on IP telephone (internet protocol telephone) networks to exemplify communication networks. A real case study of IP telephone networks is modeled using TM.


2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Kjetil Andersson ◽  
Daniel Göller

Abstract A substantial share of customers in emerging markets use dual-SIM phones and subscribe to two mobile networks. A primary motive for so called multi-simming is to take advantage of cheap on-net services from both networks. In our modelling effort, we augment the seminal model of competing telephone networks á la Laffont, Rey and Tirole (1998b) by a segment of flexible price hunters that may choose to multi-sim. According to our findings, in equilibrium, the networks set a high off-net price in the linear tariffs to achieve segmentation. This induces the price hunters to multi-sim. We show that increased deployment of dual-SIM phones may induce a mixing equilibrium with high expected on-net prices. Thus, somewhat paradoxically, deployment of a technology that increases substitutability, and thereby competition, may end up raising prices.


2021 ◽  
pp. 95-124
Author(s):  
Laszlo Solymar

Several attempts at inventing the telephone are described, particularly the crucial contribution of Alexander Graham Bell. The invention was offered to Western Union but its managing director declined to accept the offer on the basis that he saw no future for the telephone. The head of the British Post Office, William Preece, had similar views. He believed that the availability of messenger boys will make the telephone unnecessary. Women’s employment prospects improved with the emergence of telephone exchanges. The growth in the telephone networks is shown graphically. Telephone broadcasting worked in Budapest for nearly four decades including the First World War.


Author(s):  
Sergiu Apostu

This paper presents an analysis of voice traffic in telephone networks, based on machine learning algorithms to detect frauds made by callers. Starting from the raw data set that includes information about the call date, destination number, duration and caller's number, in our approach we were able to identify fraudulent calls in early stages. For balance, the data set was split in 2 parts: one for training and one for testing. To obtain mean’s values from dataset, a standardization technique was applied in order to scale the data before the dimensionality reduction using Principal Component Analysis. Then, the first two components were used as inputs for Logistic Regression and Random Forest models, having the caller as target. Finally, the target was moved on the destination file so as to identify the caller and the moment when the call has started based on a vector representation of words.


Author(s):  
S.Krishna Prabha ◽  
◽  
Broumi said ◽  
Selçuk Topal ◽  
◽  
...  

Routers steer and bid network data, through packets that hold a variety of categories of data such as records, messages, and effortless broadcasts like web interfaces. The procedure of choosing a passageway for traffic in a network or between several networks is called routing. Starting from telephone networks to public transportation the principles of routing are applied. Routing is the higher-level decision-making that directs network packets from their source en route for their destination through intermediate network nodes by specific packet forwarding mechanisms. The main function of the router is to set up optimized paths among the different nodes in the network. An efficient novel routing algorithm is proposed with the utilization of neutrosophic fuzzy logic in this work addition to many routing algorithms for finding the optimal path in the literature. In this approach, each router makes its own routing decision in the halting time. Various concepts like routing procedures, most expected vector, most expected object, and list of estimated delays are explained.


2021 ◽  
Vol 11 (1) ◽  
pp. 288-293
Author(s):  
Nada I. Najim

Abstract Advances in communication technology have significantly altered our knowledge about telephone networks. The remarkable expansion in communication is obvious in numerous aspects of life of life; the transmission of information has never been easier. Wireless communication has also had a remarkable development, and these facilities have become more reliable and easily accessible. This study, through a descriptive approach in accordance with earlier studies, aims to explain how to increase the capacity of wireless data delivery in addition to other important challenges that face the enhancement of these services in remote areas. This study highlights the challenges that accompany the adoption of wireless networks in remote areas: particularly signal strength. This is highly linked to the specific features of rural areas in terms of living habits in separated nodes rather than in high-density population centers areas.


Planning to improve the signal condition of cellular telephone networks in a company is very important. PT. Artisan Wahyu is a company engaged in property and real estate. The purpose of this study was to determine the quality and strength of the signal beam at the Gandaria 8 Office Tower using the G-net Track Lite application, to determine the number of indoor omnidirectional antennas based on capacity planning method, and for determining the number of omnidirectional indoor antennas based on coverage planning method. The research method used is quantitative method with a descriptive type of research. By using the analysis method of Capacity Planning and Coverage Planning. Therefore, it is necessary to plan an omnidirectional indoor antenna analysis so that activities in communication can be enjoyed properly. From the results of the research conducted, there were four plans for omnidirectional indoor antenna networks for the 2nd floor based on capacity and coverage of 6 antennas. Whereas for the 22nd floor based on capacity as much as 3 and for coverage as many as five antennas so that the Coverage Planning method is recommended to be applied to the Gandaria Building 8 Office Tower. (FF, FA, RM).


Author(s):  
Sarit Prava Das ◽  
Shatabdi Das

Competitor pressures, plummeting sales revenue and outdated marketing strategy are some reasons behind a company’s need to reposition itself and remain financially viable. India's telecommunication network is the second largest in the world based on the total number of telephone users (both fixed and mobile phone). It has one of the lowest call tariffs in the world enabled by the mega telephone networks and hyper-competition among them. This research sought to know the impact of rebranding on the loyalty of the network’s subscribers and the general attitude of the People towards branding in the telephony business. A survey was carried out on subscriber attitude towards Airtel as a result of the multiple rebranding through which it emerged


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