Introduced in 2010, Apple’s iPad has been met with generally favourable reviews and sales, becoming far and away the most popular tablet computer on the world market. Sort of a ‘halfway house’ between and iPhone and Macbook, the iPad is an impressive gadget indeed. It runs a great many programs, and comes with up to 64GB of memory, not bad for a thing not much fatter than a short novel (and not much bigger, either). In fact, it has a great many appealing features. Continue reading “Tonight there’s gonna be a Jailbreak”: How the iPad sets a worrying precedent for the PC Tablet
What would you do if i stated I had found a radio accessory short article that is not only fascinating but educational also? I knew you wouldn’t believe me, so here it is the informative, superb and appealing article
By Dr. Sanjay Gupta, Chief Medical Correspondent
Just about every time I use a cell phone, I plug in my wired earpiece first. Having discussed the use of earpieces on several news shows, people expect to see me using one. If I am walking around the CNN studios, my colleagues often comment on it. In airports, people will stop me in the rare cases I forget to use the earpiece, and remind me about it. Perhaps, they are intrigued because I am a neurosurgeon who openly shows some concern about cell phones. Continue reading Gupta: Cell phones, brain tumors and a wired earpiece
More from the web, i found them funny and i hope you enjoy as well…….
There are quite a few police earpieces on the market right now, Renée, so the high likelihood is that whatever you need, someone, somewhere will be selling it. If it helps, I’ll give you a bit of an overview…
If you’re in the market for an overt earpiece, or even if you fancy something a bit more discreet (like, um, a covert earpiece), you’ll certainly be able to find it on the World Wide Web. Police organizations across the world employ a wide variety of communications equipment, from ‘listen only’ devices to PTT (Push To Talk) earpieces and, as I said, a significant portion of that equipment is available for consumer purchase. Continue reading What earpieces work with police radios
2013 has been a roller coaster year for tablets and for technology in general, and although a lot of that can be attributed to a giant lamp voiced by Bill Nighy (and if you missed the reference then you missed out on one of the year’s best movies), even more still can be ascribed to the good taste and ludicrously high standards (“what do you mean there’s no ‘time travel’ app!?) of YOU, the British consumer.
In order to continue this upward trend, we put our heads together and compiled a list of the year’s best tablets. You may be surprised at what comes first (actually, no, you won’t. We’ll say that right now. There are no surprises waiting for you at number one). Anyway, read on… Continue reading Top 5 Tablets To Buy This year
Radio is the wireless transmission of signals through free space by electromagnetic radiation of a frequency significantly below that of visible light, in the radio frequency range, from about 30 kHz to 300 GHz. These waves are called radio waves. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.
Information, such as sound, is carried by systematically changing some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.
The etymology of “radio” or “radiotelegraphy” reveals that it was called “wireless telegraphy”, which was shortened to “wireless” in Britain. The prefix radio- in the sense of wireless transmission, was first recorded in the word radioconductor, a description provided by the French physicist Édouard Branly in 1897. It is based on the verb to radiate .
The word “radio” also appears in a 1907 article by Lee De Forest. It was adopted by the United States Navy in 1912, to distinguish radio from several other wireless communication technologies, such as the photophone. The term became common by the time of the first commercial broadcasts in the United States in the 1920s. The term was adopted by other languages in Europe and Asia. British Commonwealth countries continued to commonly use the term “wireless” until the mid-20th century, though the magazine of the BBC in the UK has been called Radio Times ever since it was first published in the early 1920s.
In recent years the more general term “wireless” has gained renewed popularity through the rapid growth of short-range computer networking, e.g., Wireless Local Area Network, Wi-Fi, and Bluetooth, as well as mobile telephony, e.g., GSM and UMTS. Today, the term “radio” specifies the actual type of transceiver device or chip, whereas “wireless” refers to the lack of physical connections; one talks about radio transceivers, but another talks about wireless devices and wireless sensor networks.
Radio systems used for communications will have the following elements. With more than 100 years of development, each process is implemented by a wide range of methods, specialized for different communications purposes.
Transmitter and modulation
Each system contains a transmitter. This consists of a source of electrical energy, producing alternating current of a desired frequency of oscillation. The transmitter contains a system to modulate some property of the energy produced to impress a signal on it. This modulation might be as simple as turning the energy on and off, or altering more subtle properties such as amplitude, frequency, phase, or combinations of these properties. The transmitter sends the modulated electrical energy to a tuned resonant antenna; this structure converts the rapidly changing alternating current into an electromagnetic wave that can move through free space.
Amplitude modulation of a carrier wave works by varying the strength of the transmitted signal in proportion to the information being sent. For example, changes in the signal strength can be used to reflect the sounds to be reproduced by a speaker, or to specify the light intensity of television pixels. It
was the method used for the first audio radio transmissions, and remains in use today. “AM” is often used to refer to the mediumwave broadcast band .
Frequency modulation varies the frequency of the carrier. The instantaneous frequency of the carrier is directly proportional to the instantaneous value of the input signal. Digital data can be sent by shifting the carrier’s frequency among a set of discrete values, a technique known as frequency-shift keying.
FM is commonly used at VHF radio frequencies for high-fidelity broadcasts of music and speech . Normal TV sound is also broadcast using FM.
Angle modulation alters the instantaneous phase of the carrier wave to transmit a signal. It is another term for Phase modulation.
(Asked by Nadia from Los Angeles, California)
Before I answer your question, I have a question for you; what’s the weather like in the City of Angels?
Because right now, as I type this from my home in the UK, its bloody freezing and if it’s warmer where you are, then I think I may have to answer your question in person!
On to your question, does it matter if the watch isn’t ‘Dick Tracy’ branded? Because if that’s what you’re after, then I’m sorry to say that, to the best of my knowledge at least, a ‘Dick Tracy’ branded two-way radio wristwatch doesn’t exist. If/when they make another DT movie (the last time they did, I was a little boy and I had the promotional T-shirt, so we must be due for one), then it seems likely that they will make one. Continue reading Why isn’t there a Dick Tracy style radio wristwatch on the market? (Asked by Nadia from Los Angeles, California)
OK, To find the ‘flaking’ part of my answer out of the way nice and early, I’ve to mention that it is dependent completely on what you would like from the headphone. There is not much point spending out on an all-singing, all-dancing tremendous-headphones if all you need is a basic model, but, by the same token, great superiority doesn’t come cheap in the world of electronics.
Though, that is not what you planned to hear, is it? Continue reading The Bluetooth headphone could have been about for years, but which one of these current crop is worth purchasing?
Essentially, an android is a Human-like robot designed to mimic the appearance, mannerisms and body language of a flesh and blood person. However, even that definition is a flimsy one, as science fiction writers have come up with numerous weird and wonderful ways to create many new types of androids (at least on the page).
Sometimes an android is built by an alien race and thus resembles its creators. Sometimes an android is mostly robotic, but has some recognizably Human traits and sometimes an android is a bioorganic machine that is ‘grown’ rather than built (making it very similar to the legendary homunculus creatures of ancient myth, or even the Golem of Jewish folklore). Continue reading Tech We’d Like to See: Androids
Imagine a young Marlon Brando starring alongside Johnny Depp, or Audrey Hepburn playing rival to Sandra Bullock as Marilyn Monroe stops by for a catty cameo.
Depending on how you look at it, this is either tantalizing ‘fantasy film making’ or else an utterly horrible, cash-in exercise in Hollywood excess. Whatever your viewpoint, it does seem likely that someone, somewhere will try this in the near future.
About three years ago, the news broke that George Lucas, the genius behind the ‘Star Wars’ merchandise (and a couple of related movies), was buying up the likeness rights to a plethora of iconic, yet deceased, leading men and famous actresses from Hollywood’s golden age. His plan? To use a concoction of existing footage, CGI and motion capture to create reasonable facsimiles of classic Hollywood stars and have them appear in future films, despite the notable handicap of being, well, dead. Continue reading Tech We’d Like To See: The Dead Actor’s Studio
The radio can be a significant resource of the baby. The classical features provided with this product, furthermore for the transmission of voices and texts, will be the cogent reasons for the elevated usage. Mobile phones aren’t mere communication products as well as the leisure uses are lots of. When you are idle and want to entertain, it may be perfect to experience a device in the pocket for everybody the main reason.
They’re broadly proven to become the best choice. In spite that it absolutely was initially made to have the ability to exchange voices over distances, it’s become device to provide entertainment and competes while using computer in your house. It’s portable little also.In occasions of emergency like getting twisted in crowded places, your delay might be communicated effectively through text messages. Waiting is not anymore a monotony along with your mobile phone in the palm. It’s very amusing using the qualities supplied by the walkie talkies models. Checking mails, browsing internet, hearing music, taking photographs, watching tv might be completed from you throughout an insipid travel. Hence mobiles allow us just like a communication device that works many tasks. Continue reading Radio Navigation Systems
Ham radio (so called because its operators were originally derided as being ‘hammy’ in the 19th century, when the technology first emerged) is a term that applies to any form of amateur radio broadcasting.
There are designated radio frequency spectra available solely for public use. Uses range from recreation to communication and the non-commercial exchange of ideas. ‘Hams’ take advantage of these frequencies in order to transmit any number of things Continue reading What is Ham Radio & How Does it Work?
The Voyager one craft, which recently evolved into the 1st man-made entity to depart our sun system, has transmitted peculiar, high pitched shrieks and squeals from outside the void.
The sounds, described by some as a ‘howl’ and by some like the ‘scream’, were recorded at a expanse of 12 Billion miles from our sun. Continue reading ‘Shrieks’ Heard From Deep space
Bone conduction headphones (commonly referred to as ‘Bonephones’) are actually really clever. In order to best explain how they work, I’ll need to take you on a journey into the Human ear…
No, not literally. That would be disgusting.
OK, so you know how sound travels through the air? Surely you must have done that science experiment at school where you hear sound disappearing into an airless vacuum? Yup, it’s just like that. Continue reading How does bone conduction work?