The Protective Layers of the SSH-2
January 20th, 2008
The SSH-2 or the revised Secure Shell protocol has a clean internal architecture made up of well-separated layers. The transport layer handles initial key exchange and server authentication and thereby sets up encryption, compression and integrity verification. The user authentication layer handles client authentication and provides various authentication methods. However, it should be noted that authentication is client-driven thus a password prompt may be initiated by an SSH client rather than the server.
The connection layer defines the concept of channels, channel requests and global requests using SSH services that are provided. SSH-2’s open architecture allows for substantial flexibility so that SSH can be used for a variety of purposes beyond the Secure Shell.
Communicating the IM Way
January 20th, 2008
Instant messaging or IM is considered by many as a better form of communication compared to email. This is due to the ability of IM to offer real-time communication while allowing for easy collaboration. IM is more similar to a genuine conversation as against the letter format of email. Peers are able to know when a user is busy, available or away from the computer. The difference however is negligible once a system allows offline messages or the sending of messages to people who are not logged on.
Additional features such as seeing the other party, using web-cams or direct conversation over the Internet for free helped in propagating IM’s popularity. Instantaneous and simultaneous communication is possible between several parties. Information is transmitted swiftly and efficiently and conversations can be saved for future reference.
ANPR - Big Brother’s Secret Weapon
January 20th, 2008
The concept of a big brother watching our every move has been the focal point of science fiction novels and movies for year and a main theme among future predicting articles. But while much of our financial information can and is being tracked online, it is customary to assume that our daily movements and actions still enjoy a sense of anonymity. A popular movie released a few years ago starring Tom Cruise titled Minority Report depicted a future where human beings are tracked in public places via retinal scanners that identified each person as he passed by. Thankfully we do not (yet) live in such a world but the recent implementation of a new technology called Automatic number plate recognition is bringing us one step further.
Unlike Minority Report’s retinal scans, the Automatic number plate recognition (ANPR) system does not recognize pedestrians but it does make tracking registered vehicles extremely easy for law enforcement purposes. A recent attempt to crack down on drivers lacking car insurance which is required by law has gotten UK police to set up the ANPR system at multiple locations. The ANPR can detect cars as fast as one per second even while traveling at speeds of up to 100 miles per hour. The system cross checks the passing cars with existing motor insurance records to find drivers with missing auto insurance and remove them from the road. It’s hard to criticize such a step taken by authorities but I can’t help but wonder whether we have not seen the last from the ever growing bigger brother…
LED Lighting
January 20th, 2008
LED has filled specialist niches for lighting requirements. It is commonly used for traffic lights, flashlights and architectural purposes. LED lighting is flexible and operates less expensively than traditional lighting. It was accidentally discovered by a graduate student trying to make really small quantum dots. Quantum dots may contain from 100 to 1,000 electrons. The smaller these quantum dots are, the easier they are excited. This particular group contained exceptionally small ones which reacted by producing a white glow when applied with electricity or shined with a light.
LED lamps have current efficiencies of 30% with much higher levels possibly attainable plus a lifetime of more or less 50,000 hours. It is struggling to deliver the required intensity of light output for domestic use and maintaining a reasonable working lifespan at a reasonable cost as well.
A Small Idea Goes a Long Way
January 20th, 2008
We discussed a few options for giving your home a nice makeover with a couple of very simple steps yesterday but sometimes what we seek is more than simply cosmetic modifications. Many households come to a point where home begins to be too small to accommodate their growing family. But before rushing to move out and seek a bigger house, there are a number of steps that you can take to better utilize the existing space in your house. More and more people are discovering the advantage of garage conversions as a method to simply and cost effectively add another room to an existing house.
Let’s face it, in most cases our garage is not the most efficiently used room in the house and with a few simple steps any garage can be converted into a cozy livable room. The picture on the right was taken from anglianhome.co.uk’s site which demonstrates how simple it is to convert a garage in such a way were you would never have guessed the room wasn’t originally designed with the house. A nice option they offer is the possibility to convert only half of an existing garage into a spare room, leaving the remaining space for storage. Sometimes a small (but good) idea goes a long way.
The Language Advantage
January 19th, 2008
In terms of languages and writing systems supported out of the box, Linux has the advantage over Windows. Linux distributions support writing systems for most modern national languages and various minority languages except Mongolian. However, this is being worked on by the Soyombo Linux project. Windows, for its part still lack support for Ethiopic, Gurmukhi, Oriya, Tibetan, Mongolian, Burmese and Lao.
The localization and globalization aspects of a computer’s operating system should be taken into consideration by system developers. Being responsive to the individual intricacies of each and every language holds the key to continuous widening of user support. With language barriers down, users can concentrate on integrating the system with their own requirements.
Surrey Care Home Gets New Voice
January 19th, 2008
I remember back at college when we had our own campus radio. It was something that really portrayed the atmosphere and life on campus and in many cases set the tone for the day. Obviously having a campus radio station is not something that rare, but when I heard about the new private radio initiative certain Surrey residents are now enjoying I really took interest. That’s because the new station does not cater a young college campus or army base, rather it servers the residents of a local elderly care home.
Story of the new initiative was published yesterday on bettercaring.com , a leading resource for care and nursing homes related information. In addition to news and updates from the field, the site also features expert tips and advice for anyone interested in care solutions for themselves or their loved ones. Thankfully society is taking care solutions more seriously nowadays and many options are now available to cater each individual’s needs and preferences. Bettercaring.com allows people to take advantage of the web to discuss their own experiences and share advice with others in similar situations.
We Are What We Eat
January 19th, 2008
Nothing can be truer than the old adage that says that a person’s well being is determined by the things that enter his/her body. It is no wonder then that some consider food as the ultimate drug that can lead to good health. A food’s benefit is only reaped when it is consumed in a manner and quantity that can best serve the individual human requirements.
Poor eating habits are known to contribute to the development of diseases that could otherwise be avoided. Eating more fruit, vegetables, beans, nuts and whole grains seems to be the way to go because of their contents that influence the make-up of human cells while enhancing cell communication. They are also great sources of antioxidants that neutralize the harmful free radicals.