ZWOS - A Lightweight Operating System For Lightweight Embedded Wireless Devices

2005 ◽  
Author(s):  
Michael Melkonian ◽  
Jim Wu
Keyword(s):  
Operating System ◽  
Wireless Devices

scholarly journals An Adaptive Scheduler for Real-Time Operating Systems to Extend WSN Nodes Lifetime

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Roberto Rodriguez-Zurrunero ◽  
Ramiro Utrilla ◽  
Elena Romero ◽  
Alvaro Araujo
Keyword(s):  
Operating System ◽  
Real Time ◽  
Operating Systems ◽  
Research Area ◽  
Rechargeable Batteries ◽  
Wireless Sensor ◽  
Portable Devices ◽  
Wireless Devices ◽  
Changing Environments ◽  
Tasks Scheduling

Wireless Sensor Networks (WSNs) are a growing research area as a large of number portable devices are being developed. This fact makes operating systems (OS) useful to homogenize the development of these devices, to reduce design times, and to provide tools for developing complex applications. This work presents an operating system scheduler for resource-constraint wireless devices, which adapts the tasks scheduling in changing environments. The proposed adaptive scheduler allows dynamically delaying the execution of low priority tasks while maintaining real-time capabilities on high priority ones. Therefore, the scheduler is useful in nodes with rechargeable batteries, as it reduces its energy consumption when battery level is low, by delaying the least critical tasks. The adaptive scheduler has been implemented and tested in real nodes, and the results show that the nodes lifetime could be increased up to 70% in some scenarios at the expense of increasing latency of low priority tasks.

scholarly journals OLSR in android operating system

2021 ◽  
Author(s):  
Nasim Chowdhury
Keyword(s):  
Operating System ◽  
Routing Protocol ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Wireless Devices ◽  
Test Bed ◽  
Ad Hoc Routing ◽  
Ad Hoc Networking ◽  
Code Base ◽  
Android Operating System

Optimized Link State Routing protocol, an ad-hoc routing protocol, has been popular in wireless devices running on Linux operating system for quite some time. In this project we have outlined the process of preparing Android devices for ad-hoc networking, a way to overcome limitations of the OS for continuous UDP communication, ensure all devices communicate on the same wireless Wi-Fi SSID, Cell-ID, subnet and finally implement the Optimized Links State Routing (OLSR) in Android Operating System using Google Nexus 7 devices. Using the code base from ProjectSPAN, an open source project, OLSR protocol has been ported to Android Nexus 7 devices. The core application is divided into two major sections, MANET and OLSR. Mobile Ad-hoc Network portion of the code takes care of setting up the device for ad-hoc mode communication, firewall and peripheral setup while OLSR portion of the code maintains the neighbor tables, MPRs and routing. The project also describes the process by which a device is prepared to run low level custom codes in Android operating system. The OLSR implementation has been successfully tested with three nodes test bed, demonstrating the multi-hop ad-hoc networking capabilities of this wireless routing protocol. With the aid of the Android’s graphical interface the application is able to exhibit the dynamic nature of the OLSR protocol. As nodes and neighbors in the network moves around with respect to time and relative location, OLSR protocol is able to form new neighbors and elect Multipoint Relay in real time.

scholarly journals OLSR in android operating system

2021 ◽  
Author(s):  
Nasim Chowdhury
Keyword(s):  
Operating System ◽  
Routing Protocol ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Wireless Devices ◽  
Test Bed ◽  
Ad Hoc Routing ◽  
Ad Hoc Networking ◽  
Code Base ◽  
Android Operating System

Optimized Link State Routing protocol, an ad-hoc routing protocol, has been popular in wireless devices running on Linux operating system for quite some time. In this project we have outlined the process of preparing Android devices for ad-hoc networking, a way to overcome limitations of the OS for continuous UDP communication, ensure all devices communicate on the same wireless Wi-Fi SSID, Cell-ID, subnet and finally implement the Optimized Links State Routing (OLSR) in Android Operating System using Google Nexus 7 devices. Using the code base from ProjectSPAN, an open source project, OLSR protocol has been ported to Android Nexus 7 devices. The core application is divided into two major sections, MANET and OLSR. Mobile Ad-hoc Network portion of the code takes care of setting up the device for ad-hoc mode communication, firewall and peripheral setup while OLSR portion of the code maintains the neighbor tables, MPRs and routing. The project also describes the process by which a device is prepared to run low level custom codes in Android operating system. The OLSR implementation has been successfully tested with three nodes test bed, demonstrating the multi-hop ad-hoc networking capabilities of this wireless routing protocol. With the aid of the Android’s graphical interface the application is able to exhibit the dynamic nature of the OLSR protocol. As nodes and neighbors in the network moves around with respect to time and relative location, OLSR protocol is able to form new neighbors and elect Multipoint Relay in real time.

Routine Digital Processing of Microscope Images

1990 ◽  
Vol 48 (1) ◽  
pp. 550-551
Author(s):  
E. Wisse ◽  
A. Geerts ◽  
R.B. De Zanger
Keyword(s):  
Operating System ◽  
Digital Processing ◽  
Hard Disks ◽  
The Sun ◽  
Tape Drive ◽  
High Definition ◽  
Fluorescent Microscope ◽  
Microscope Images ◽  
Helical Scan ◽  
Ethernet Connection

The slowscan and TV signal of the Philips SEM 505 and the signal of a TV camera attached to a Leitz fluorescent microscope, were digitized by the data acquisition processor of a Masscomp 5520S computer, which is based on a 16.7 MHz 68020 CPU with 10 Mb RAM memory, a graphics processor with two frame buffers for images with 8 bit / 256 grey values, a high definition (HD) monitor (910 × 1150), two hard disks (70 and 663 Mb) and a 60 Mb tape drive. The system is equipped with Imaging Technology video digitizing boards: analog I/O, an ALU, and two memory mapped frame buffers for TV images of the IP 512 series. The Masscomp computer has an ethernet connection to other computers, such as a Vax PDP 11/785, and a Sun 368i with a 327 Mb hard disk and a SCSI interface to an Exabyte 2.3 Gb helical scan tape drive. The operating system for these computers is based on different versions of Unix, such as RTU 4.1 (including NFS) on the acquisition computer, bsd 4.3 for the Vax, and Sun OS 4.0.1 for the Sun (with NFS).

Home Automation Using Bluetooth

2020 ◽  
pp. 675-678
Author(s):  
Mukesh Mahajan ◽  
Astha Dubey ◽  
Samruddhi Desai ◽  
Kaveri Netawate
Keyword(s):  
Temperature Sensor ◽  
Humidity Sensor ◽  
The Other ◽  
Automation System ◽  
Home Automation ◽  
Wireless Devices ◽  
Home Appliances ◽  
Home Automation System ◽  
Condition Systems

This paper reviews basically about Bluetooth based home automation system. It is controlled by PIC microcontroller. Home automation can be defined as the ability to perform tasks automatically and monitor or change status remotely. These include tasks such as turning off lights in the room, locking doors via smartphone, automate air condition systems and appliances which help in the kitchen. Now a days several wireless devices are available such as Bluetooth, Zigbee and GSM. Since Bluetooth is low in cost than the other two and hence is used more. In this paper we have described the methods of automating different home appliances using Bluetooth and pic microcontroller. Different sensors are involved in this system to advance and make it smarter. Sensors such as temperature sensor, liquid sensors, humidity sensor etc. can be used.

PERBAIKAN TATA LETAK LANTAI PRODUKSI INDUSTRI MEBEL MENGGUNAKAN METODE GRAFIK DAN ALGORITMA CRAFT

2020 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Kuswanto Kuswanto ◽  
Juan Junius ◽  
Anita Christine Sembiring
Keyword(s):  
Operating System ◽  
Material Handling ◽  
Facility Layout ◽  
Integrated Planning ◽  
Furniture Manufacturing ◽  
Milling Machines ◽  
Material Handling Costs ◽  
The Cost ◽  
A Company ◽  
Research Show

Facility layout is integrated planning of the flow of a product in an operating system to obtain the most effective and efficient interrelation between workers, materials, machinery, and equipment as well as handling and transferring materials. A company engaged in furniture manufacturing has a problem in its production process, namely, the distance between machines is too far so that it affects the cost of handling materials. Distant workstations are found on profile machines, milling machines, measuring machines, cutting machines. Therefore, improvements must be made to the layout of facilities on the production floor so that facility layout is efficient and material handling costs are reduced. The problem-solving approach used is the Graph Method and CRAFT Algorithm. The results of the research show that material handling costs are reduced by 7.58% or Rp. 17,765 using the CRAFT algorithm.

Pengembangan Sistem VOIP Menggunakan Server Issabel Versi 4.0 dan Tunnel EOIP pada OMNI Hospital Alam Sutera

2018 ◽  
Vol 18 (1) ◽  
pp. 13-20
Author(s):  
Elly Mufida ◽  
David Wardana Agus Rahayu
Keyword(s):  
Operating System ◽  
Open Source ◽  
End Of Life ◽  
Communication System ◽  
Communication Protocol ◽  
The Internet ◽  
Migration Process ◽  
Web Browser ◽  
Backup Path ◽  
E Mail

The VoIP communication system at OMNI Hospital Alam Sutera uses the Elastix 2.5 server with the Centos 5.11 operating system. Elastix 2.5 by the developer has been declared End of Life. The server security system is a serious concern considering that VoIP servers can be accessed from the internet. Iptables and fail2ban applications are applications that are used to limit and counteract those who try to attack the VoIP server. One application that can be used as an open source VoIP server is the Issabel Application version 4.0. The migration process from Elastix 2.5 application to Issabel 4.0 by backing up all configurations in the Elastix 2.5 application through a web browser including the configuration of endpoints, fax, e-mail, asterisk. After the backup file is downloaded then upload the backup file to the Issabel 4.0 application then run the migration process. Adding a backup path as a failover connection is needed because the VoIP communication protocol between the OMNI Hospitals Group still uses one path so that when there is a problem in the connection path, the communication protocol will stop. The tunnel EoIP is a protocol used as a backup path between the OMNI Hospitals Group site.

PERANGKAT LUNAK KOMPUTER

2020 ◽  
Author(s):  
Adinda Ayu Fadhilah
Keyword(s):  
Operating System ◽  
Computer Program ◽  
Programming Languages ◽  
Computer Users ◽  
System Software ◽  
Application System ◽  
Software Application

Perangkat lunak komputer merupakan sebuah program komputer yang menjembatani pengguna komputer dan perangkat keras yang digunakannya. Dengan kata lain perangkat lunak merupakan penerjemah antara manusia sebagai orang yang memberi instruksi dan komputer sebagai pihak yang menerima instruksi. Perangkat lunak memang tidak tampak secara fisik dan tidak berwujud benda namun bisa untuk dioperasikan. Perangkat lunak secara garis besar software atau perangkat lunak dapat diklasifikasikan menjadi tiga bagian yaitu, perangkat lunak sistem operasi, perangkat lunak sistem aplikasi dan bahasa pemograman.Kata kunci : Perangkat Lunak KomputerAbstractComputer software is a computer program that bridges computer users and the hardware they use. In other words software is a translator between humans as the person who gives instructions and the computer as the party who receives instructions. The software does not appear physically and is not tangible but can be operated. Software outline software or software can be classified into three parts, namely, operating system software, application system software and programming languages.

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