Study of reliability measures of a local area network via copula linguistics approach

2015 ◽  
Vol 32 (1) ◽  
pp. 97-111 ◽  
Author(s):  
D. K. Rawal ◽  
Mangey Ram ◽  
V. V. Singh
Keyword(s):  
Operating System ◽  
Local Area Network ◽  
Local Area ◽  
Design System ◽  
Area Network ◽  
Time To Failure ◽  
Reliability Measures ◽  
Content Type ◽  
Partial Failure ◽  
Complete Failure

Purpose – The purpose of this paper is to find the reliability measures of Linux operating system connected in local area network (LAN). Design/methodology/approach – The system has two different topologies, i.e. star topology (subsystem-1) and bus topology (subsystem-2), are placed at two different places, and connected to a server through a hub. Both the topologies have n clients. The system has partial failure and complete failure. The partial failure is of two type’s namely minor partial and major partial. The minor partial failure degrades the system whereas the major partial failure brings the system to a break down mode. The system can completely fail due to failure of server hacking and blocking. Findings – By using supplementary variable technique and Laplace transformation, by taking different types of failure and two types of repairs the availability, non-availability, mean time to failure and cost analysis (expected profit) of the design system have been obtained. Originality/value – In this research, a mathematical model of Linux operating system has been discussed from which one can check the behavioral analysis of the designed system.

Printed array antenna with an elephant trunk shape radiating patch for Bluetooth and WLAN applications

Circuit World ◽  
2020 ◽  
Vol 46 (4) ◽  
pp. 355-362
Author(s):  
Yashar Zehforoosh ◽  
Mehdi Zavvari
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Array Antenna ◽  
Power Divider ◽  
Area Network ◽  
Elephant Trunk ◽  
Content Type ◽  
Frequency Bands ◽  
Wilkinson Power Divider

Purpose This purpose of this study is to present a novel four-element array antenna in combination with a modified Wilkinson power divider feeding network. Design/methodology/approach The two covering bands of this planar array antenna are achieved by an Elephant trunk shape (ETS) radiating element; therefore, two frequency bands for Bluetooth (2.4 GHz) and the wireless local area network (WLAN) band (5.15-5.825 GHz) are obtained. Findings An improved design of the power divider with curved corners rather than the sharp edges and certain new modifications in the length of matching stubs are implemented. Originality/value This paper describes an improved four-way Wilkinson power divider with excellent loss of insertion and adequate return loss for all ports and good isolation performance within two frequency bands (2.4 and 5.5 GHz) and when loaded with array components; the modified power divider complies with the design requirements. To comprehend its behavior, numerical and experimental results are provided. The simulated and measured results indicate a proper bandwidth coverage of the suggested antenna, stable radiation patterns and high gain.

The Special Research on a Low Noise Amplifier

2012 ◽  
Vol 605-607 ◽  
pp. 2057-2061
Author(s):  
Xin Yin ◽  
Yi Yao ◽  
Jin Ling Jia
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Noise Figure ◽  
Design Method ◽  
Local Area ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Design System ◽  
Area Network ◽  
Noise Amplifier

This paper studies a low noise amplifier design method for 5.8G wireless local area network. Using the software of designing RF circuit ADS(Advanced Design System) and Avago Technologies’s ATF-36077,we designed a three-cascade LNA. In 5.725G~5.85GHz range, noise figure less than 0.5dB, more than 30dB gain, input and output standing wave ratio less than 1.3dB.The LNA meet the design requirements.

scholarly journals PENERAPAN KECERDASAN BUATAN PADA GAME “AIR STRIKE STTA” BERBASIS CLIENT SERVER PADA ANDROID

Compiler ◽  
2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Eko Teguh Prasetyo ◽  
Nurcahyani Dewi Retnowati
Keyword(s):  
Operating System ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Data Traffic ◽  
Client Server ◽  
Traffic Lane ◽  
Unity 3D ◽  
Android Operating System

Smartphones with Android operating system is one proof that the very quickly progress of technology. Functions and services on Android smartphones is no longer just for communication but also for entertainment such as games. Application are made in this research is a game that applies artificial intelligence with pathfinding techniques and can be played in single player and two players using the wireless local area network as data traffic lane with distribution techniques client server and can be played on smartphones with Android operating system. Software used to create this game is the Unity 3D engine. Unity 3D is a game creator software that is very powerful at this time. By using Unity 3D can make a game in a variety of devices, one of which is on a smartphones with Android operating system. With the application of this game can be a means the entertainment for anybody.

scholarly journals Sistem Kendali Perangkat Elektronik Jarak Jauh Berbasis Jaringan Nirkabel Menggunakan Secure Shell (SSH) dan robot Operating System (ROS)

2020 ◽  
Vol 7 (6) ◽  
pp. 1205
Author(s):  
Abdul Jalil
Keyword(s):  
Operating System ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Electronic Devices ◽  
Local Area ◽  
Remote Access ◽  
Raspberry Pi ◽  
Area Network ◽  
Air Conditioner ◽  
Robot Operating System

<p>Salah satu tantangan di era revolusi industri 4.0 adalah pengembangan sistem kontrol secara jarak jauh menggunakan koneksi jaringan nirkabel. Tujuan penelitian ini adalah membangun sistem kontrol perangkat elektronik jarak jauh dengan memanfaatkan jaringan <em>wireless tethering </em>pada <em>smartphone</em> menggunakan topologi <em>Wireless Local Area Network</em> (WLAN) dan <em>Robot Operating System</em> (ROS) sebagai perangkat lunak kontrol. Pemanfaatan <em>wireless tethering smartphone</em> untuk berbagi koneksi internet dapat dimanfaatkan untuk mengontrol perangkat elektronik yang terkoneksi ke Raspberry Pi. Koneksi jaringan <em>wireless tethering</em> memiliki arsitektur jaringan yang cukup sederhana jika dibandingkan dengan arsitektur pengontrolan jarak jauh lainnya, serta memiliki jarak jangkau koneksi yang cukup jauh dibandingkan dengan koneksi Bluetooth. Metodologi yang digunakan untuk mengontrol perangkat elektronik pada penelitian ini adalah menggunakan <em>Remote Access Control</em> (RAC) berbasis protokol SSH. Pemanfaatan <em>wireless tethering</em> dan aplikasi <em>mobile</em> SSH dapat digunakan untuk mengirim perintah ROS <em>message</em> dari <em>smartphone</em> ke Raspberry Pi untuk mengontrol pin GPIO Raspberry Pi agar aktif <em>high</em> atau aktif <em>low</em>. Pada saat ROS <em>message</em> mengirim perintah ke GPIO untuk aktif <em>high</em>, maka sistem akan memberikan instruksi kepada relay untuk menyalakan perangkat elektronik. Selanjutnya pada saat GPIO menerima perintah untuk aktif <em>low</em>, maka sistem akan memberikan instruksi kepada relay untuk mematikan perangkat elektronik. Hasil penelitian ini adalah <em>smartphone </em>android dapat digunakan untuk mengontrol perangkat elektronik seperti lampu, kipas angin, pemanas ruangan, dan <em>air conditioner</em> secara jarak jauh menggunakan jaringan WLAN berdasarkan perintah dari ROS <em>message</em>. Perangkat elektronik pada penelitian ini dapat di kontrol secara efektif pada jarak 20 meter di dalam ruangan dan 40 meter di area bebas hambatan.</p><p> </p><p class="Judul2"><strong><em>Abstract</em></strong></p><p class="Abstract"><em>One of the challenges in the Industrial Revolution 4.0 is the development of control systems by remotely using a wireless network connection. This study aims to build a control system for controlling the electronic devices by remotely with the utilization of wireless tethering network in the smartphone used Wireless Local Area Network (WLAN) topology and Robot Operating System (ROS) as software for the controller. Utilization of wireless tethering in the smartphone for share the internet connection can be used for control the electronic devices that connected to the Raspberry Pi. The connection of wireless tethering has a simple architecture when compared with the other architecture of the control system by remotely, it then has a long-range connection when compared to the Bluetooth connection. The methodology has used to manage the electronic devices in this study is used Remote Access Control (RAC) based on SSH protocol. The utilization of wireless tethering and mobile SSH can be used to sends ROS message command from smartphone to the Raspberry Pi to control the Raspberry Pi GPIO pin to active high or active low. When android smartphone send ROS message command to the Raspberry Pi to make the GPIO to active high, the system will instruct the relay to turn on the electronic devices. Then when GPIO accepts the instruction to active low, the system will instruct the relay to turn off the electronic devices. The result of this study is that android smartphone can be used to control the electronic devices such as a lamp, fan, heater, and air conditioner by remotely used WLAN network and command from ROS message. The electronic devices on this study can be controlled by effectively with the distance of 20 meters in the rooms and 40 meters at the outside area. </em></p><p class="Judul2"><strong><em><br /></em></strong></p>

scholarly journals Analisa Kecepatan Lalu Lintas Data Jaringan Local Area Network Menggunakan Graphical Network Simulator 3 (GNS-3)

2021 ◽  
Vol 1 (1) ◽  
pp. 13-19
Author(s):  
Ayyub Ramli ◽  
Sriyono Sriyono ◽  
Harry Ramza
Keyword(s):  
Operating System ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Network Simulator ◽  
Packet Tracer

Perkembangan teknologi informasi tidak bisa dipisahkan dari perkembangan teknologi dan infrastruktur jaringan komputer. Pembuatan suatu jaringan diperlukan perancangan dan simulasi terlebih dahulu supaya hasilnya sesuai dengan keinginan atau mendapatkan sesuatu yang maksimal. Banyak sekali komponen yang dapat digunakan untuk perancangan seperti router. Router sendiri memiliki banyak system operasi contohnya router MikrotikOS. Jurnal ini untuk merancang dan mensimulasikan jaringan komputer. Perancangan dan simulasi jaringan komputer dapat menggunakan aplikasi Graphical Network Simulator 3(GNS3). GNS3 adalah software simulasi jaringan komputer berbasis GUI yang mirip dengan Cisco Packet Tracer. Namun pada GNS3 memungkinkan simulasi jaringan yang komplek, karena menggunakan operating system asli dari perangkat jaringan seperti cisco, mikrotik dan juniper. Sehingga kita berada kondisi lebih nyata dalam mengkonfigurasi router langsung daripada di Cisco Packet Tracer. Berbeda dengan Cisco Packet Tracer, pada GNS3 harus menginstal terlebih dahulu system operasi dari router itu sendiri yaitu router MikrotikOS maupun CiscoIOS. Di dalam penulisan ini akan dibahas mengenai bagaimana merancang dan mensimulasikan jaringan komputer menggunakan aplikasi GNS3 dengan konfigurasi yang baik dan benar sehingga dapat diterapkan dengan baik.

Anchor shape gap coupled patch antenna for WiMAX and WLAN applications

2019 ◽  
Vol 38 (1) ◽  
pp. 263-286 ◽  
Author(s):  
Vivek Singh ◽  
Brijesh Mishra ◽  
Rajeev Singh
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Patch Area ◽  
Resonant Frequencies ◽  
Content Type ◽  
High Frequency Structure Simulator

Purpose Purpose of this study is to design a compact gap coupled anchor shape patch antenna for wireless local area network/high performance radio local area network and worldwide interoperability for microwave access applications. Design/methodology/approach An anchor shape microstrip antenna is conceived, designed, simulated and measured. The anchor shape antenna is transformed to its rectangular equivalent by conserving the patch area. Modeling and simulation of the antenna is performed by Ansys high frequency structure simulator (HFSS) electromagnetic solver based on the concept of finite element method. The simulated results are experimentally verified by using Agilent E5071C vector network analyzer. Theoretical analysis of an electromagnetically gap coupled anchor shape microstrip patch antenna has been performed by obtaining the lumped element equivalent of the transformed antenna. Findings The proposed antenna has a compact conducting patch of dimension 0.26λ × 0.12λ mm2 (λ is calculated at lower resonating frequency of 3.56 GHz) with impedance bandwidths of 100 and 140 MHz and antenna gains of 1.91 and 3.04 dB at lower resonating frequency of 3.56 GHz and upper resonating frequency of 5.4 GHz, with omni-directional radiation pattern. Originality/value In literature, one does not encounter anchor shape antenna using the concept of gap coupling and parasitic patches. The design has been optimized for wireless local area network/worldwide interoperability for microwave access applications with a relatively low patch area (291.12 mm2) as compared to other reported antennas for wireless local area network/worldwide interoperability for microwave access applications. Transformed antenna and the actual experimental antenna behavior varies, but the resonant frequencies of the transformed antenna as observed by theoretical analysis and simulated results (by high frequency structure simulator) are reasonably close, and the percentage difference between the resonant frequencies (both at lower and upper bands) is within the permissible limit of 1-2.5 per cent. Results confirm the theoretical proposition of transformation of shapes in antenna design, which allows a designer to adapt the design shape according to the application.

scholarly journals PERANCANGAN DAN IMPLEMENTASI SERVER VOICE OVER INTERNET PROTOKAL (VOIP) DENGAN TRIXBOX PADA WIRELESS LOCAL AREA NETWORK MENGGUNAKAN SMARTPHONE

2015 ◽  
Vol 6 (2) ◽  
pp. 87
Author(s):  
Muhammad Iqbal Nahwi ◽  
Edy Victor Haryanto ◽  
Budi Triandi
Keyword(s):  
Operating System ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Free Software ◽  
Area Network

<p>ABSTRAK <br /> <br />Pada saat ini data telekomunikasi dalam kehidupan manusia sangatlah penting, baik untuk berhubungan antara manusia dalam hal pemenuhan kebutuhan dan informasi maupun hiburan. Sedangkan secara nyata, utuk biaya komunikasi di negara indonesia masih termasuk mahal. Pemanfaatan teknologi VoIP dalam komunikasi yang murah, aman dengan kualitas yang cukup baik sangat tepat untuk diterapkan di negara ini. Pada teknologi VoIP ini berkomunikasi melalui telepon tidak hanya bisa dilakukan dengan mengandalkan pesawat telepon konvensional maupun handphone, namun melalui jaringan internet juga bisa dilakukannya. Dalam penelitian ini metodologi yang digunakan adalah mengimplementasi sistem VoIP pada linux trixbox. Infrastruktur jaringan VoIP yang dirancang menggunakan protokol SIP(session initiation protokol) <br />sebagai protokol komunikasi, memanfaatkan free software linux Trixbox sebagai operating system, asteriks sebagai aplikasi server, dan di sisi client menggunakan softphone X-lite. aplikasi Keyyo VoIP digunakan untuk client pada smartphone.</p>

Strathnet—a local area network

1981 ◽  
Vol 1 (1) ◽  
pp. 21 ◽  
Author(s):  
David Hutchison ◽  
Doug Shepherd
Keyword(s):  
Local Area Network ◽  
Local Area ◽  
Area Network

A Local Area Network for Medical Research; Planning, Realization and Experience

1991 ◽  
Vol 30 (01) ◽  
pp. 53-64 ◽  
Author(s):  
R. Schosser ◽  
C. Weiss ◽  
K. Messmer
Keyword(s):  
Medical Research ◽  
Word Processing ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Test Installation ◽  
Cost Performance ◽  
The Public ◽  
On Line ◽  
The University

This report focusses on the planning and realization of an interdisciplinary local area network (LAN) for medical research at the University of Heidelberg. After a detailed requirements analysis, several networks were evaluated by means of a test installation, and a cost-performance analysis was carried out. At present, the LAN connects 45 (IBM-compatible) PCs, several heterogeneous mainframes (IBM, DEC and Siemens) and provides access to the public X.25 network and to wide-area networks for research (EARN, BITNET). The network supports application software that is frequently needed in medical research (word processing, statistics, graphics, literature databases and services, etc.). Compliance with existing “official” (e.g., IEEE 802.3) and “de facto” standards (e.g., PostScript) was considered to be extremely important for the selection of both hardware and software. Customized programs were developed to improve access control, user interface and on-line help. Wide acceptance of the LAN was achieved through extensive education and maintenance facilities, e.g., teaching courses, customized manuals and a hotline service. Since requirements of clinical routine differ substantially from medical research needs, two separate networks (with a gateway in between) are proposed as a solution to optimally satisfy the users’ demands.

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