Temperature Control Circuit by Fan

The circuit is temperature control by fan, this circuit can control temperature and it also indicates the temperature. All the above functions are monitored and controlled by the 8 bit microcontroller AT89S52. The system will get the temperature from the IC DS1820 and it will control the speed according the values stored in the code.? The System is fully controlled by the microcontroller AT89S52.  Here is a schematic drawing:

Proposal GSM based Control System

1.0 Introduction to Project
“GSM based Control System” implements the emerging applications of the GSM technology. Using GSM networks, a control system has been proposed that will act as an embedded system which can monitor and control appliances and other devices locally using built-in input and output peripherals.  Remotely the system allows the user to effectively monitor and control the house/office appliances and equipments via the mobile phone set by sending commands in the form of SMS messages and receiving the appliances status. The main concept behind the project is receiving the sent SMS and processing it further as required to perform several operations. The type of the operation to be performed depends on the nature of the SMS sent. The principle in which the project is based is fairly simple. First, the sent SMS is stored and polled from the receiver mobile station and then the required control signal is generated and sent to the intermediate hardware that we have designed according to the command received in form of the sent message.

 We have selected a particular Nokia mobile set (Nokia 3310) for our project. The messages are sent from the mobile set that contain commands in written form which are then processed accordingly to perform the required task. A microcontroller based system has been proposed for our project. There are several terminologies that are used extensively throughout this project report.

 GSM (Global System for Mobile Communications): It is a cellular communication

standard.

 SMS (Short Message Service): It is a service available on most digital mobile phones that permit the sending of short messages (also known as text messaging service).
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CONSTRUCTION QUALITY CONTROL INSPECTION PROGRAM

 

 The guidelines presented in this chapter provide staff engineers and geologists with recommended procedures and criteria to be used in reviewing and evaluating construction quality control inspection programs for FERC jurisdictional projects. These guidelines are based on the FERC Regulations, FERC Operating Manual for Inspection of Projects and Supervision of Licenses for Water Power Projects, and selected Quality Control Inspection Programs (QCIPs) from each FERC Regional Office. The term "licensee" in the remainder of this chapter refers to licensee, exemptee or applicant as appropriate. The review performed by staff will be conducted to ensure that submitted QCIPs comply with the Commission's Regulations and provide accepted construction quality control inspection and documentation practices common to the hydroelectric industry. Quality control has been defined as measuring conformance with the requirements.

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 CONSTRUCTION QUALITY CONTROL INSPECTION PROGRAM
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[ REPORT ] The Robot control using the wireless communication and the serial communication

 Abstract:

 This project outlines the strategy adopted for establishing two kinds of communications; one for wireless communication between a mobile Robot and a remote Base Station, another for serial communication between a remote Base Station and a GUI Application, PC. TekBot is a low cost mobile Robot built by Oregon State University which in its current version requires wired communication. Our aim is to be able to command and control the Robot wirelessly by the GUI Application. This will be a useful addition for NASA’s curriculum development for master’s degree programs.
  The principle task of this project was to program the AVR microcontroller interfaced to a radio packet controller module (operating at a frequency of 433 MHz) which would enable us to wirelessly control the Robot. The communication protocols dealing with transmission and reception of data and wireless control of the TekBot have been successfully implemented. These details are discussed in this report.

1. Introduction

The NASA Robotics Alliance Cadets Program is a far-reaching, innovative project aimed at creating a new highly integrated and interactive college undergraduate level curriculum centered around Robotics and focusing on the content of at least the first two years of Mechanical Engineering, Electrical Engineering and Computer Science. This project is being co-led by Mark Leon, NASA AMES Director of Education and David Schneider of Cornell University and is supported by David Lavery, NASA Program Executive of Planetary and Solar Exploration. The program is being designed to be implemented at a very low start-up cost, and to make this goal obtainable, the program is being developed using low to no cost components from already developed, well-tested and robust engineering testbeds. The Microcontroller board to be used is the Oregon State University TekBots platforms, whose base kit is approximately $100.

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TCP

 click here complete Lecture Notes: Computer Networks

Topics in TCP

TCP Congestion Control

If the receiver advertises a large window-size , larger than what the network en route can handle , then there will invariably be packet losses. So there will be re-transmissions as well . However , the sender cannot send all the packets for which ACK has not been received because this way it will be causing even more congestion in the network. Moreover , the sender at this point of time cannot be sure about how many packets have actually been lost . It might be that this is the only one that has been lost , and some following it have actually been received and buffered by the receiver. In that case , the sender will have unnecessarily sent a number of packets. So the re-transmission of the packets also follows slow-start mechanism. However , we do indeed need to keep an upper bound on the size of the packets as it increases in slow start, to prevent it from increasing unbounded and causing congestion. This cap is put at half the value of the segment size at which packet loss started.

Congestion Window

NETWORK SECURITY THREATS AND ATTACKS

NETWORK SECURITY THREATS AND ATTACKS

When a network is connected to the Internet to increase information sharing, communications, or productivity, the network is vulnerable to potential intrusions and attacks. Areas where potential intruders can enter may be dial-up access points, network connections, or misconfigured hosts.

Misconfigured hosts, frequently overlooked as points of network entry can be network systems that (1) use unprotected login accounts (such as guest accounts), (2) employ extensive trust in remote commands, (3) have illegal modems attached to them, or (4) use easy-to-break passwords (Cisco Systems, 1997). Security threats are classified as passive or active (Stallings & Van Slyke, 1998). Passive attacks involve eavesdropping on, or monitoring, transmissions without actually disturbing the network. The main concern of the point of vulnerability in the net-work is eavesdropping by another employee or unauthorized user. Data is transmitted in the form of frames or packets containing the source and destination address, and other related information. An eavesdropper can monitor the traffic of this information on the network. Individuals who attempt to read privileged data, perform unauthorized modification to data, or disrupt the system, on the other hand, carry out active attacks. There are many ways in which to attack the network security. These security attacks target the key elements of the network security architecture as aforementioned:

GSM,GPRS BASED PROJECTS

 GSM,GPRS BASEDPROJECTS  ,,,,,others report are comming soon

GSM based notice board system:> REPORT HERE

Home security system using GSM:> REPORT HERE

GPS BASED VEHICLE BILLING SYSTEM WITH SAFETY FEATURES:> REPORT HERE

DOOR LOCKING SECURITY SYSTEM UING GSM:> REPORT HERE

 Home appliance control using GSM

Child monitoring using GSM + GPS

Offline Cargo Monitoring System using GPS

Article tracking system using GPS and GSM                                

 SOFTWARE FOR SHORTCUTFILE REMOVEABALE DOWNLOAD

GSM based data monitoring system

Remote Temperature Monitoring through GSM.

Intelligent TAXI metering Based on GPS

Car security System using GSM/ GSM+GPS.

GSM based Traffic density monitoring and control

GSM based Energy Meter.

GSM based bus tracking.

SMS reader for blind.

GSM based voting machine.

Mark Announcement System using GSM.

Remote Sales Terminal.

Remote Irrigation control and monitoring using GSM

Weather monitoring using GSM for hazardous areas.

Water reservoir monitoring and PUMP station control using GSM

Wild life monitoring and location indicators for visitors using GPS+GSM
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