Camera Phones Plaza

The audio broadcasting service is called radio broadcasting. It broadcasts through the air in the form of radio waves. The electromagnetic radiation is sent to an receiving antenna by a transmitter. Audio broadcasting can be done through FM cable, satellite , wire networks and Internet. The first radio stations were just radiotelegraphy systems and it first occurred in 1906 on Christmas Eve. In November 1920 the Montreal station began to broadcast.
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In 1990s internet-based radio became feasible. The stations were broadcasting from all over the world without having the need of licence. With the help on the internet you can easily locate a station website and listen to whatever music you want. AM and FM stations are the best known type of radio station that are broadcasted via radio waves. Throughout the developed world several subtypes of station radios can be found: public, commercial and non-profit varieties, campus radio and hospital radio.

Many stations that broadcast on shortwave bands using AM technology, are now eclipsed by internet-distributed radio. Atmospheric conditions and solar activity influences shortwave broadcasting. There are many non-broadcast radio stations such as: police, ambulance, fire, military, taxi or even amateur radio stations.

The earliest broadcasting stations to be developed, were AM stations. AM means amplitude modulation which refers to the amplitude of the carrier signal  that varies in response of the signal’s amplitude that is transmitted.

Many Europe countries uses long wave band. In 1990s FM radio gained popularity. On of the advantage of AM is that it has a signal that isn’t sophisticated  and simple equipment is necessary to detect it and uses a bandwidth that is narrower than FM.

AM broadcasts occur in medium wave frequency, known as the standard broadcast band,  which has the range of 530 to 1700 kHz. Channels are spaced 9 kHz all around the world, and 10 kHz in America.



One of the advantage is that AM transmissions are not ionospherically propagated in day time. In order to avoid interference, the power of regional channels must be reduced at night. Although radio transmitters are limited to 10 kHz because of FCC rules, Am can have a frequency of 15 kHz.

FM mean frequency modulation. And was invented by Edwin H. Armstrong in 1930 to overcome the interference of AM radio. FM has a frequency range of 88 to 108 MHz almost everywhere, except Russia and Japan Cool FM is popular in United States and Europe because of the stereo broadcasting and  higher sound fidelity which was made possible by spacing stations further apart, 200 kHz  apart. In New Zeeland is mandatory 700 kHz.



Yankee Network was the first cool FM radio from United States and began broadcasting in 1939. Today’s frequencies were used after the Second World War. In 1980s all radios had both FM and AM tuners, FM became the dominant one leaving AM for rural environments.

Frequency modulation FM conveys information through a carrier wave having a variable frequency. The technique named frequency-shift keying refers to the digital data that can be sent by shifting the carrier’s frequency.As the signal power increases, the nose power decreases. Based on the Bessel functions, sideband amplitudes and carrier are illustrated below  to see the different modulation indices of FM signals.

Indirect or direct frequency modulation is used to generate FM signals. Directly feeding the message  into the input of a VCO you can achieve direct FM modulation. The message signal is integrated to generate a phase modulated signal for indirect FM modulation. FM is used for radio frequencies, speech and music. This FM type is called wide-FM. It is also used to send signals into the space.

The inventor of frequency modulation is an electrical engineer named Edwin Howard Armstrong which lived between 1890-1954. He was born in New Your City . He became a professor at Columbia University, after he graduated there. While he was still a student he invented the generative circuit which he patented in 1914 and also the superheterodyne in 1918 and super-generative circuit in 1922.



As time passes and technology improves , formats change in popularity. The first radio equipments allowed programmes to be broadcasting in real time but as technology improved , now are used pre-recorded materials or they can even operate without human control.

A signature block is the appended text of the end of the e-mail. This text appears automatically at the bottom of the e-mail and consists  some information of the one who sent the message. The information includes the person’s name, phone, e-mail or even web sites. The McQuary guideline informs us that a signature block shouldn’t be longer than four lines and should be a plain text, not HTML .
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Many internal policies require the corporations to have e-mail signatures. In Germany , companies have to specify the company’s name, place and number of registration. On the other hand, on internet forums the rules are not so strict. A signature can be a simple one or even images are allowed. Signatures are seen as a personal touch for the ones that create them . You can see how your e-mail signature looks like, if you send a message to yourself . If your e-mail package doesn’t send signatures automatically , you can write a text message in a file and you can manually copy and paste it in each mail you send .

Here are some positive and negative aspects of GMail: it has a good text editor to create e-mail but you cannot add HTML signatures with images. While Hotmail, Yahoo and Outlook have this option available. GMail has standard features such as font size, colours, hyperlinks, bullets but you cannot add other HTML tags . With GMail you can upload photos but it will look like an attachment.

I will show you how to embed in GMail,  HTML signature with images: you start by creating, in an notepad, a HTML signature with all kinds of tags. Then you just have to copy it to your GMail window.

Few people realize the potential of an e-mail signature. Every time you send a message you have the chance to share something . You can use funny or wise sayings to make your e-mail stand out amid the clutter. If you add the signature in the right way, you will surely be appreciated, noticed and remembered .   Signatures are very flexible. You can create different signatures for different people. In this case your boss won’t receive the same signature you sent your lover .



If you look on the web you will find programs such as Email Generator programs which create basic image email signature badge that can be used on Yahoo, GMail and Hotmail. It is beneficial for you to have a custom email signature in this online world !

This is how you can create a signature with logos and pictures. On the Tolls menu from Outlook, you have to click Options and then Mail Format Tab. In the Compose this message format, under Message format, click the format that you want to use. Click New on the Signatures, type a name in the Enter a name for your new signature, then choose how to create your signature, click next and advanced edit. A dialog box will open saying that a new editor will open, then you click yes. You can now insert your signature into the message .

Because you never know where your e-mail will land, you must enter a signature and a salutation in every email. The hardest part of writing is getting started. This is available for me too. I always stay in front of the computer and it seems like the blank screen intimidates me. I realize now that most of the emails start with a cliché , so why shouldn’t I do that too. Long sentences are too boring, we have to write short sentences and underline or bold what it is important .



The e-mail correspondence is truly important in our days. It saves time, it is very convenient and has really changed our communication. Unfortunately e-mail aren’t secure , it can be read not by the people it was intended to and this can cause devastating consequences .

Cool e-mail signatures vary from company to company or from one person to another. Because of the legal requirements , contact and identification information is mandatory for an e-mail. You can add footers right at the end of the message or below the text. You can have several footers and separate conditions for them are created. Several footers can be sent in the same message, for example a general company disclaimer and your personal signature .



You don’t have to be an IT specialist to create HTML footers. Placeholders creates unified signatures in terms of format and style,  for employees .With the help of testing tools and reviewing you will not get confused and will let you see what the final message will look like .



The signature block is often overlooked part in an e-mail. We have to realize that it has an important role by providing pertinent information. The first rule is to make sure we include our e-mail address in the e-mail, although it can seem silly. You have to make your signature aesthetically pleasant so try to avoid small fonts or extra large ones and also avoid multiple colours. Don’t forget to keep t simple and elegant! Cool  e-mail signatures are useful because people can reach you more quickly. We also have to be careful not to put too many information about us, leaving the other person think that he/she didn’t wanted to know so many thinks about us .

A ,,house plan’’ is a set of construction and working drawings. Site plans are an overview of the construction and shows where the home is located on the property, the location of the utility services, easements, setback requirements, walkways and location of driveways. A floor is an overview of the entire house showing the sizes of the rooms, where the windows and doors are , will also include drawings for finishes or furniture. Elevations are drawn to scale and include rear, front and side elevations. All the details that are necessary for the architectural styling are specified, such as: the positioning of the final fall of the land, ridge heights, exterior finishes and roof pitches. A section describes how the home will be made  and takes a closer look to the internal finishes. They also explain in more detail certain conditions: ceiling type and height and dimensions of the doors and windows.
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Some more information may be provided for cool house plans but this is compulsory: the plan of foundation, framing plan, the sub-floor plan, roof plan, interior walls drawings, detail drawings, structural layouts, electrical drawings that show the switches and what light they operate.

Lines and symbols are used in order to show the relationship between objects: thick lines for walls, thin dotted lines for special ceiling treatment . House plans include veranda, garage, bedroom, bathroom, kitchen, living room, fireplace, basement, closet, closet, attic. The open floor plan refers to the area that is not closed by walls and which allows people to interact.

Spaces are divided into public areas, residential rooms, private rooms, passages, storage. Public areas are considered to be classrooms, locker rooms, library, lobby, conference hall, restroom, waiting room. Some of the residential rooms are : dining room, home office, kitchen. Private rooms are: bathroom, bedroom, nursery. Balcony, elevator, hallway, stairway are just some of the passages. Attic, basement, garage, laundry room, workshop are all utility and storage rooms.



Here are some cool house plans:

-          Cape Code home plans were the first plans that people built in America. They are easy to recognize because of the low eaves, steep rooflines, the central door with transoms and on top of the house, the large chimney. This type of house became the Cape Cod style. Because of its efficiency and affordability these homes are still popular today. Its influence on other architectural designs is seen through New England accents.

-          Contemporary house plans are lacking ornamentation. Other home designs have large windows that emphasize the close relation with nature.

-          Luxury home plans may contain servants’ quarters, guests suites, home entertainment rooms, garages and pool houses. Luxury is a lifestyle, not only a style. Here are some styles: European, traditional, colonial, Spanish, country or farmhouse. The smallest house can have 3500 square feet and it can reach up to 11.000 square feet. The most popular design styles are European  and Mediterranean house plans.



-          Traditional home plans combine architectural details from many styles .These kind of plans are familiar but also fresh. It can suit everyone’s taste.

-          Coastal house plans are created for seaside. Usually these plans are for holiday houses , where people can come with their friends and family to enjoy the sun. These plans are created in order to withstand bad weather conditions. They also include open air spaces such as porches  to be focused on the beach .

-          Historic home plans have accents and detailing that will make you feel you lived in that generation. These houses have a vintage architectural look .

-          Nothing is more practical than a ranch house. People of all ages choose a ranch home. You can arrange efficiently the space with a low budget .

-          Some of the most beautiful homes in America are the Mediterranean houses because of their stucco exterior, red roofs and courtyards .

-          Vacation homes are second homes. They have living spaces with large windows from where you can have a beautiful view .

-          European style plans usually resemble the style from a specific country. The exterior is made of stone, brick or stucco with cast-stone and iron accents. The roof is steep with many gables .



One thing is clear, everyone wants to have their own home, sooner or later. Is up to you if you are going to be directly involved in the construction phase. Interest, time and abilities will help you bring your dream into reality. You will have to take care of every aspect but creating the perfect house can be an exciting think for you .

Home can be many things to one person, from the place you hang your coat, link to the past  and by entering the door you can walk into the future. Home is your heritage and history, it is like a tree with deep roots. You can feel lost if you don’t know where your ,,home ‘’ is. Someone once said that home is where your heart is. Everyone has a special relationship with the place they grew up in. Many of us, I’m sure they grew up in many places not just in one. This special relationship will last a lifetime. Where we grew up left a print on who we are now .

Thinking back to the places where we grew up, it surrounds us with nostalgia and this happens because nothing in life stays the same very long .

The advertisement provided by yahoo and supporting instant messages, is called Yahoo Messenger . You can download it and will not cost a thing. You need to create your own ID, with use name and password.  By using Yahoo Messenger you will have access to other services, too. You will be notified by Yahoo Mail if you have new emails, you can send files, see your friends through webcam. It was originally launched in 1998 by the name Yahoo! Pager.
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Yahoo Messengers offers features such as: to customize the window , you have an address book and status, customize avatars. It was the first who use buzz and music. Yahoo Messenger was released in 2007 for Windows Vista which is not available from October 2008. Also in 2007 Yahoo Messenger 9 Beta was released, with new emoticons ,media player which allows you to watch videos and photos or YouTube on the IM window.  You can share files of 2GB and leave voicemails. Plug-ins are now available to users .

Yahoo wants to integrate Yahoo Messenger and Yahoo! Mail Beta and make them like the emails. To allow users to search through their previous dialogues. No matter what version of Yahoo you have, you are able to access chat rooms. In 2005 with no warning at all, Yahoo! Stopped the ability to use chat rooms, most probably because of the lawsuit regarding pedophilia. Because of the low demand difficulties Yahoo Chat getting closer to its final days which is considered to be March 2010 .

Webcan is still used all over the world, because it enables us to see out interlocutor with a speed of 1 to 2 frames/second. The resolution is of 160 x 120 pixels or 320 x 240.

Another cool yahoo messenger tool is offline message . You can write a message to the chosen contact, although he/she is not signed in. The interoperability between Windows Live Messenger and Yahoo! Is very interesting. Since 2006 users can chat to each other without having to create an account on the other messenger but until now users don’t have the opportunity to use voice service. If you have Java you can challenge your contact to play games .



Unfortunately Yahoo! Messenger delivers viruses, spyware, trojans and worms to other users. Here are some methods in which hackers deliver viruses: delivering a message with a web address, sending an infected file or a crafted message. The most known viruses are created as a message that seems to come from someone you know. The message is written in a friendly way .

The problem of SPIM (unsolicited messages) is one that is not solved yet , although users continuously require solving this problem. To recover lost password for Yahoo Messenger you can use the tool Yahoo Messenger Password. Yahoo funny can be used to send funny images .

YMulti Messenger is the newest Yahoo Messenger and is perfect for those you use multiple IDs. You can read your messenger’s archive without log in. Another cool yahoo messenger tool is Messenger History Extractor which helps you to extract the messenger’s history in HTML, plain text, XML. You can choose the time period you are interested in or the contact. It is also available for other Internet Messengers such as: Miranda, ICQ, RQ.



Yahoo Messenger Spy allows you to block, record or monitor conversations. You can save messages and process them later. You can add more functions to Yahoo Messenger by using Messenger Plus. You can choose from a number of avatars, the avatar you want. Use Buddy Spy to find out what are your friends doing, even if they are invisible. Just by using YMSG protocol you can find out if your friends’ web cam is online, in what chat room they are in.

The Yahoo Messenger Monitor Sniffer is created to observe and capture conversations in a network. YTL Lite provides Yahoo Messenger with safe list, privacy, ignore bid, style and font , spam blocking. With  MSN Messenger 7 & 8 Poligamy you can use multiple MSN Messenger simultaneously. You can choose from 60 or 70 Yahoo Messenger Smiles. You just have to select  a smiley and the code will automatically be inserted .



Take advantage of the new buttons: the transparent button allows you to see another window besides the Yahoo Messenger, your desktop will be more attractive, with the stay-always on top button you can avoid the distractions , the ghost button works effective with the above mentioned buttons. ,Sent to button’’ is used when you don’t want to close your Yahoo Messenger window but you still want to check something out in, let’s say, Microsoft Word or Microsoft XL, minimize alternatively button will help you minimize the icon or you can minimize the entire Yahoo

Messenger into a small icon and place it on the desktop, ,,roll up’’ buttons will make your windows smaller but their title will be visible. Use ,,copy to clipboard’’ if you want to insert information.,, Move to monitor’’ button is useful if you want to place Yahoo Messenger on a monitor in the case when you have many monitors connected to the computer. As the name implies ,,resize’’ button will change the size of Yahoo Messenger .

Innovation is the key to success . Useful features had been implemented into MSN Messenger so this makes Yahoo Messenger be on top  leaving other services behind.

The word ,,experiment’’ comes from a Latin word that means ,,to try out’’. An experiment is a method that investigates a hypothesis or  relationships between variables. An experiment is a way in which you can find things about the world.   It is used to negate or to support an assumption or to solve in a problem in a practical way.
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An experiment can be done with the help of scientific method. Here are the steps of an experiment: observe, address a question, think of a hypothesis, find out the results, conclusion, inform others about the results.

The comparison between an experimental sample and a control sample, is called controlled experiment. Take for example the drug experiment. One person receiving the drug and the controlled one would receive placebo. The practice in many laboratories is to have some samples with negative and positive control. Tests are usually done double or triple. The procedure that resembles the original experimental test  but which give a positive result, is called positive control .

The protein assay is used in teaching laboratories. A fluid sample is given to the students with a unknown quantity of protein. The students will perform a controlled experiment to find the concentration of protein. They will make positive control samples  and negative control samples. The process in which a spectrophotometer measures the quantity of protein in samples is called the assay .

When it is difficult to control the conditions in an experiment, controlled experiments can be performed by creating several sample groups.

Experiments on humans need special protection from the outside variables, in this case, against placebo effect. It is mandatory for the volunteer and the researcher not to know whoa actually took the drug . This will make sure that the effects that the volunteer’s feel are because of the treatment and not a fact that they knew they are treated .

Experiments cannot always be controlled so researches resort to natural experiments. Researches collect data and then observe the correlation between the explanatory variables. Naturally experiments are not as reliable as controlled experiments. Very cool science experiments are performed in the following disciplines: political science, economics, palaeontology, geology, astronomy and meteorology. The first example is from 1600s , light has a measurable speed and doesn’t travel from place to place. Because of ethical reasons , in the area of medicine, observational studies are used. Field experiments are used in economic analyses and social science. The advantage of field experiments is that they are performed in natural settings but the disadvantage is that they might get contaminated .

"We have to learn again that science without contact with experiments is an enterprise which is likely to go completely astray into imaginary conjecture." — Hannes Alfven



As you know some experiments are done in the filed and some are done in the lab but some people see an experiment in every rocket. We still know little about the stratosphere. When a rocket is send into the space it goes through the stratosphere . There is a need for someone to watch the trail of chemical fuel exhaust. A team attached sensors to a jet plane, this is a kind of plane that is used by NASA, that went straight through the wake of rocket engines. From this very cool science experiment they found out that exhaust erodes the stratospheric ozone .

No one knows exactly how useful is carbon oxide in the Earth’s processes. Scientists want to create an artificial atmosphere. It is important for us to know that methane is the most important greenhouse gas. Scientists are know interested to know how does methane influenced the climate. Methadine comes from natural sources, unlike carbon dioxide. There are six satellites that take snapshots of atmosphere. These six satellites are called A-Train and each of them have names. Aqua- studies the movement of water, CloudSat – studies the properties of clouds, Parasol – studies microphysical properties, Aura – interested in ozone emissions, Calipso – measures aerosols and Orbiting Carbon Observatory that had the important tasks but crashed in February 2009. To replace it, Glory was launched in October .



The atmosphere remains a mystery  and we can only try to solve it by getting closer and see the interactions that happen there. For 2 years now, a team from University of California built a chamber, nine meter long. They use the device in order to trace chemicals .

It is thought that even the fact that many people cook on low-tech stoves, can have an important role in black carbon emissions. We are talking here about the developing world with poor families that cook on open stoves. These stoves need to be replaced by modern ones and then to monitor the atmospheric changes and see the results .



Scientists know how to take samples of air  from the ground but are still learning how to take this samples from the sky. Researches from Harvard University  sent a plane from one pole to the other in order to take samples on their way. In this way they found out that carbon dioxide seems to go north while Antarctic has more oxygen . To find out more, 2 jet planes will fly at different periods of the year .

The entire intellectual spectrum is interested in unsolved problems. Physical science had an explosive development at the beginning of 20^th century. We are still at the beginning of understanding life and its wonders .