Wednesday, November 3, 2010
Mozilla SeaBird Concept Phone in 2D/3D
Logitech launches the K750 Wireless Solar Keyboard, to be available for $80
Mophie Juice Pack Air for the iPhone 4
Thursday, July 22, 2010
RC AMPLIFIER
Tuesday, July 20, 2010
Electronic amplifier
An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In this sense, an amplifier may be considered as modulating the output of the power supply.
There are many alternative classifications that address different aspects of amplifier designs, and they all express some particular perspective relating the design parameters to the objectives of the circuit. Amplifier design is always a compromise of numerous factors, such as cost, power consumption, real-world device imperfections, and a multitude of performance specifications. Below are several different approaches to classification:
Monday, July 19, 2010
Online address book with upto date information(cs project topic)
People usually changes email addresses and mobile number. Before changing numbers, they will have given that number to many. After changing, when they try, the number will not be correct and hence the call will not be connected. Many contacts are lost in a similar way. The project aims to solve this problem by maintaining an online contact base.
Every contact on the mobile or on the desktop is synced with it. So If Frederik changes his mobile number, every contact who syncs to this database will receive an updated contact information. With this application in place there is no hassle when mobile numbers, emails or address details are changed.
Location based advertising(project topic)
Where can we make use of location based advertising ? Definitely it has to be on something that moves. Mobile, yes, but not this time. This about buses. All these buses travel many places, and most of the new ones have got electronic billboards. Why not run location based advertisements on them. The idea is to create a directory of locations (latitude and longitude) and advertisements.
An algorithm needs to be developed to find proximity to a location and change the advertisement based on that. Due to the complexity of the project, its better implemented on an embedded linux box. Coupled with GPRS, the advertisements can be updated on the fly, with out even having to stop the vehicle. The different modules of the project include an LED display controller, a GPS module and GPRS handler.
Expertsedge team
Aircell offers free in-flight connectivity for new Vibrant owners
Sunday, June 13, 2010
Trisil(electronics topic)
Wibro(electronics seminar topic)
As the wibro base stations, provides a dataflow rate of 30 to 50 Mbit/s and also allow the usage of portable internet with in arrange of 1 � 5 Km, obviously the data flow rate, of devices in motion can be in a range of 120 km/hr and about 250 km/hr for wireless lan�s having a slow speed and for mobile phones. This figures were actually higher when compared with the range and bandwidth it offered during the testing of this technology in connection with the APEC summit in Busan in 2005. The main advantage this technology has over the WIMAX standard is its Quality of service (QoS). This QoS gives more reliability for the streaming video content and for other loss-sensitive data. WiBro is quite demanding, in its needs varying from the spectrum use to equipment design, WiMAX leaves much of this up to the equipment provider while supplying enough information to confirm the interoperability between designs.
In Korea, the government by 2001 recognized the advent of this innovative technology by giving a 100 MHz of electromagnetic spectrum in the 2.3 - 2.4 GHz band. By the end of 2004, WiBro Phase 1 was standardized by the TTA of Korea and in late 2005, ITU reflected WiBro as IEEE 802.16e. By June 2006, two major telecom companies in Korea namely the KT and the SKT Two Korean Telco (KT, SKT) began the commercial operations in the country, starting with a charge rate of 30 US$.
hydrophone(electronics seminar topic)
MeSCoDe
Neuroprosthetics
Monday, May 31, 2010
Clos Architecture in OPS
The need to transmit information in large volumes and in more compact forms is felt these days more than ever before. To provide the bandwidth necessary to fulfill the ever-increasing demand, the copper networks have been upgraded and nowadays to a great extend replaced with optical fiber networks. Though initially these were deployed as point-to-point interconnections, real optical networking using optical switches is possible today. Since the advent of optical amplifiers allowed the deployment of dense wavelength division multiplexing (DWDM), the bandwidth available on a single fiber has grown significantly.
Optical communication can take place in one of the two ways - either circuit switching or else packet switching. In circuit switching, the route and bandwidth allocated to the stream remain constant over the lifetime of the stream. The capacity of each channel is divided into a number of fixed-rate logical channels, called circuits. Optical cross connects (OXCs) switch wavelengths from their input ports to their output ports. To the client layer of the optical network, the connections realized by the network of OXCs are seen as a virtual topology, possibly different from physical topology (containing WDM links). To set up the connections, as in the old telephony world, a so called control plane is necessary to allow for signaling. Enabling automatic setup of connections through such a control plane is the focus of the work in the automatically switched optical network (ASON) framework. Since the light paths that have to be set up in such an ASON will have a relatively long lifetime (typically in the range of hours to days), the switching time requirements on OXCs are not very demanding.
It is clear that the main disadvantage of such circuit switched networks is that they are not able to adequately cope with highly variable traffic. Since the capacity offered by a single wavelength ranges up to a few tens of gigabits per second, poor utilization of the available bandwidth is likely. A packet switched concept, where bandwidth is effectively consumed when data is being sent, clearly allows more efficient handling of traffic that greatly varies in both volume and communication endpoints, such as in currently dominant internet traffic.
In packet switching, the data stream originating at the source is divided into packets of fixed or variable size. In this method the bandwidth is effectively consumed when data is being sent and so allows a more efficient handling of traffic that greatly varies in both volume and communication endpoints.
In the last decade, various research groups have focused on optical packet switching (OPS), aimed at more efficiently using the huge bandwidths offered by such networks. The idea is to use optical fiber to transport optical packets, rather than continuous streams of light. Optical packets consist of a header and a payload. In an OPS node, the transported data is kept in the optical domain, but the header information is extracted and processed using mature control electronics, as optical processing is still in its infancy. To limit the amount of header processing, client layer traffic (e.g., IP traffic) will be aggregated into fairly large packets.
To unlock the possibilities of OPS, several issues arise and are being solved today. To be competitive with the other solutions, the OPS cost node needs to be limited, and the architectures should be future proof (i.e., scalable). In this context, the work of Clos on multistage architectures has been inspiring.latest list of Top 10 Indian Writers in English Today.
Salman Rushdie
The 1980s and 90s saw a renaissance of Indian writing in English making the task of choosing the top ten authors of this genre especially challenging. The renaissance was spearheaded by Salman Rushdie with his path breaking novel Midnight’s Children in 1980. Ever since his success, there has been a glut of Indian authors writing in English. These contemporary writers are not confined to people living in India, but like Rushdie, a large number of them are part of the Indian diaspora. Earlier writers like Nirad C. Choudhuri, R.K. Narayan, Mulk Raj Anand or Raja Rao used English in its classical form. However, Rushdie, with his Pidgin English, signaled a new trend in writing as well as giving voice to multicultural concerns. Although his Midnight’s Children, Shame, The Moor’s Last Sigh, Fury, and Shalimar the Clown received critical acclaim for their themes as well as his use of magic realism, the book that generated the most controversy was The Satanic Verses. He was accused of blasphemy by many Muslims because of certain allegedly irreverent references to Islam’s Prophet Mohammad. A fatwa was issued by Iran’s Ayotollah Khomeini in 1989 calling for the execution of the author. Many countries banned the book including India. Rushdie had to go into hiding in U.K. Till date, Rushdie remains a hunted man with a price on his head.
Vikram Seth
Next on the list should be Vikram Seth who produced some magnificent works like The Golden Gate, A Suitable Boy, An Equal Music, and Two Lives. His first book is written in verse form and chronicles the lives of young professionals in San Francisco. But the work that propelled him into the limelight was his second book, A Suitable Boy, which was based in a post-independent India.
Arundhati Roy
If Rushdie’s work liberated Indian writing from the colonial straitjacket, Arundhati’s Roy’s book, The God of Small Things, radically changed perceptions about Indian authors with her commercial success. She won the Booker prize and remained on the top of the New York Times bestseller list for a long time. With her also started the trend of large advances, hitherto unheard of among Indian writers.
Rohinton Mistry
The other authors who should be included in the list are: Rohinton Mistry, V.S. Naipaul, Amitav Ghosh, Jhumpa Lahiri, Shashi Tharoor, and Upamanyu Chatterjee. Mistry’s books shed light on the issues affecting the Parsi community in India. Although the novels are long and at times depressing, the beauty of the books lies in their lyrical prose. Some of his better known works include Such a Long Journey, Family Matters, and A Fine Balance.
V.S Naipaul
One of the most enduring figures in the field and a nobel laureate, V.S. Naipaul, is of Indian origin although he was born in Trinidad. His prolific writing career includes works such as A House for Mr. Biswas, India: A Wounded Civilization, An Area of Darkness, India: A Million Mutinies Now, and A Bend in the River. Naipaul is another writer who has courted controversy for a long time. His often scathing commentaries on developing countries like India or the Caribbean and his critical assessment of Muslim fundamentalism on non-Arab countries have been subjected to harsh criticism.
Amitav Ghosh
Another respected name that should feature on a list of the top ten contemporary Indian writers is Amitav Ghosh, who has won many accolades including the Sahitya Akademi Award and the Prix Medicis Etrangere of France. Although less prone to controversy, he is responsible for producing some of the most lyrical and insightful works on the effect of colonialism on the native people. His books include The Circle of Reason, The Glass Palace, The Calcutta Chromosome, and The Hungry Tide.
Jhumpa Lahiri
Jhumpa Lahiri, a recent entrant into the world of Indian writers, tackles the much-debated topic of cultural identity of Indians in a far off land. Lahiri took the literary world by storm when her debut book, The Interpreter of Maladies, won the prestigious Pulitzer Prize in 2000. The Namesake, her first novel, is an ambitious attempt to chart the lives of a family of immigrants through the eyes of a young boy. Both her books have received brickbats as well as accolades but she deserves a mention for tackling a subject long ignored by other Indian writers.
Shashi Tharoor
The list would be incomplete without a mention of Shashi Tharoor’s satirical works like The Great Indian Novel and Show Business. His latest book, India: From Midnight to Millennium, is a non-fiction chronicle of India’s past and its projected future.
Upamanyu Chatterjee
Lastly, Upamanyu Chatterjee deserves a mention as he was one of the first Indian authors who found success outside of India with his 1988 debut novel, English, August. His wry sense of humor and realistic portrayal of India has given us the witty and amusing, The Mammaries of the Welfare State. However, he hasn’t been able to replicate the success of his debut novel with his later works, especially in the West.
Happiness At Work By Srikumar Rao (Author)
Happiness At Work Book Description
About the Book :
In these tough times, there are few people who are completely happy with the current conditions. From business executives to the everyday Joe or Jane, everyone seems to be going through a rough economic and personal crunch. But acclaimed business school Professor Srikumar Rao says that we can learn to create joy no matter what else may be going on around us.
Rao shows you that it isn't the negative thing that happens to you that causes your unhappiness, it's how you see it. Happiness at Work is a thought-provoking new title that moves the mind away from negativity and forces you to resist labeling situations as "bad", but rather seeing them as neutral.
Happiness at Work provides:
- Surprising ways of looking at change and problem-solving
- Exercises that shift one's perspective
About the Author :
Srikumar S. Rao created "Creativity and Personal Mastery," the pioneering course that was among the most popular and highest rated at many of the world's top business schools. It remains the only such course to have its own alumni association. His work has been covered by major media including the New York Times, the Wall Street Journal, the Financial Times, Time, Fortune, BusinessWeek, the London Times, the Guardian and the Daily Telegraph. CNN, PBS, and Voice of America, and dozens of radio and TV stations have interviewed him.
Contents :
- What You Need is a Paradigm Shift
- Don't Stick a Label on It!
- Why Positive Thinking is Bad For You
- Be a Daruma Doll
- Let It Go-Babies Do
- Think Your Problem is Managing Time? It's Not
The Leader Who Had No Title By Robin Sharma (Author)
The Leader Who Had No Title Book Description
For more than fifteen years, Robin Sharma has been quietly sharing with Fortune 500 companies and many of the super-rich a success formula that has made him one of the most sought-after leadership advisers in the world. Now, for the first time, Sharma makes his proprietary process available to you, so that you can get to your absolute best while helping your organization break through to a dramatically new level of winning in these wildly uncertain times.
In "The Leader Who Had No Title, "you will learn: - How to work with and influence people like a superstar, regardless of your position - A method to recognize and then seize opportunities in times of deep change - The real secrets of intense innovation - An instant strategy to build a great team and become a "merchant of wow" with your customers - Hard-hitting tactics to become mentally strong and physically tough enough to lead your field - Real-world ways to defeat stress, build an unbeatable mind-set, unleash energy, and balance your personal life Regardless of what you do within your organization and the current circumstances of your life, the single most important fact is that you have the power to show leadership. Wherever you are in your career or life, you should always play to your peak abilities. This book shows you how to claim that staggering power, as well as transform your life--and the world around you--in the process.Robert Jordan, the author of 'Wheels of Time' is no more
Renowned author Robert Jordan, also famous for his fantasy series ‘Wheel of Time’ has died at the Medical University of South Carolina in Charleston of complications from primary amyloidosis with cardiomyopathy, a rare blood disease. James Oliver Rigney Jr. who adopted the pen name Robert Jordan was of 58 years only.
Sunday, April 25, 2010
Dell To Launch Its Own Mobile Phone
The phone will be available with an extended 11 cm (4.1") OLED display, a 1GHz QSD8250 Snapdragon processor, and comes equipped with 1GB of flash with 512MB Ram, and a MicroSD card with additional 8GB of storage.
Friday, April 9, 2010
Diode
In electronics, a diode is a two- terminal electronic component that conducts electric current in only one direction. The term usually refers to a semiconductor diode, the most common type today, which is a crystal of semiconductor connected to two electrical terminals, a p.n junction. A vacuum tube diode, now little used, is a vaccume tube with two electrodes; a plate and a cathode
The most common function of a diode is to allow an electric current in one direction (called the diode's forward direction) while blocking current in the opposite direction (the reverse direction). Thus, the diode can be thought of as an electronic version of a check valve. This unidirectional behavior is called rectification , and is used to convert alternating to direct current, and extract modulation from radio signals in radio receivers.
However, diodes can have more complicated behavior than this simple on-off action, due to their complex non linear electrical characteristics, which can be tailored by varying the construction of their pn junction. These are exploited in special purpose diodes that perform many different functions. Diodes are used to regulate voltage zener diode, electronically tune radio and TV receivers (varactor diode), generate radio frequency diode tunnel diode, and produce light (light emitting diode)
Solar cell
Applications and implementations
Solar cells are often electrically connected and encapsulated as a module. Photovoltaic modules often have a sheet of glass on the front (sun up) side, allowing light to pass while protecting the semiconductor wafers from the elements . Solar cells are also usually connected in series in modules, creating an additive voltage.
above figure is systematic symbol of solar cell
onnecting cells in parallel will yield a higher current. Modules are then interconnected, in seri
es or parallel, or both, to create an array with the desired peak DC voltage and current.
The power output of a solar array is measu
red in watts or kilowatts. In order to calculate the typical energy needs of the application, a measurement in wattshours, kilowatt-hours or kilowatt-hours per day is often used. A common rule thumb is that average power is equal to 20% of peak power, so that each peak kilowatt of solar array output power corresponds to energy production of 4.8 kWh per day (24 hours x 1 kW x 20% = 4.8 kWh)
To make practical use of the solar-generated energy, the electricity is most often fed into the electricity grid using inverters (grid-connected photovoltaic systems); in stand-alone systems, batteries are used to store the energy that is not needed immediately.
Solar cells can also be applied to other electronics devices to make it self-power sustainable in the sun. There are solar cell phone chargers, solar bike light and solar camping lanterns that people can adopt for daily use.
Sunday, March 28, 2010
Real-time systems play a considerable role in our society, and they cover a spectrum from the very simple to the very complex. Examples of current real-time systems include the control of domestic appliances like washing machines and televisions, the control of automobile engines, telecommunication switching systems, military command and control systems, industrial process control, flight control systems, and space shuttle and aircraft avionics.
All of these involve gathering data from the environment, processing of gathered data, and providing timely response. A concept of time is the distinguishing issue between real-time and non-real-time systems. When a usual design goal for non-real-time systems is to maximize system’s throughput, the goal for real-time system design is to guarantee, that all tasks are processed within a given time. The taxonomy of time introduces special aspects for real-time system research. Real-time operating systems are an integral part of real-time systems. Future systems will be much larger, more widely distributed, and will be expected to perform a constantly changing set of duties in dynamic environments. This also sets more requirements for future real-time operating systems. This seminar has the humble aim to convey the main ideas on Real Time System and Real Time Operating System design and implementation.
INTRODUCTION
Timeliness is the single most important aspect of a real -time system. These systems respond to a series of external inputs, which arrive in an unpredictable fashion. The real-time systems process these inputs, take appropriate decisions and also generate output necessary to control the peripherals connected to them. As defined by Donald Gillies “A real-time system is one in which the correctness of the computations not only depends upon the logical correctness of the computation but also upon the time in which the result is produced. If the timing constraints are not met, system failure is said to have occurred.”
It is essential that the timing constraints of the system are guaranteed to be met. Guaranteeing timing behavior requires that the system be predictable. The design of a real -time system must specify the timing requirements of the system and ensure that the system performance is both correct and timely.
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Virus Attack on Computers, Mobiles And Palmtops (SEMINAR TOPIC)
INTRODUCTION
Do viruses and all the other nasties in cyberspace matter? Do they