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To improve the radiation efficiency and directivity of the beam, the waveguide should be provided with an extended aperture so as to make the abrupt discontinuity of the wave into a gradual transformation, so that all the energy in the forward direction gets radiated. This can be termed as Flaring. Flaring is done to provide greater directivity and narrower beam width. The types of horn antennas depend on how they are flared.Sectoral HornThis type of horn antenna, flares out in only in one direction. Flaring in the direction of Electric vector produces the sectorial E-plane horn. As well, flaring in ... Read More
Apple launched iPhone in 2007 and caused a tidal wave of change throughout the mobile phone industry. It was the only smartphone with just one functional button (home button) which created a revolution in the market.Apple StoreApple has invented apple store for its product where you can download software safely.The invention of the apple store, created a revolution because you can download any type of software for your phone which is compatible with the i phone. Apple store can only be accessed by an apple phone user.Before iPhone, the idea of using on-screen keyboard on a phone was unimaginable. When ... Read More
Charminar is a monument which was constructed in 1591, in Hyderabad, India. The literal translation of Charminar in English is 4 pillars. It is located on the east bank of the Musi River and is listed among the most recognized structures of India. There are many theories regarding the reason for the construction of Charminar but the commonly accepted theory is that it was built to celebrate the elimination of the Plague, which was widespread at that time.Charminar was built by Muhammad Quli Qutb Shah, the fifth ruler of the Qutb Shahi dynasty. After shifting his capital from Golkonda to ... Read More
The \G modifier gets the result in vertical order. If you use \g modifier, then it won’t affect the result. The \g works likesemi-colon.Let us first create a table. The query to create a table is as follows:mysql> create table DemoOfVertical -> ( -> Id int NOT NULL AUTO_INCREMENT, -> Name varchar(20), -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (3.40 sec)Now you can insert some records in the table using insert command. The query is as follows:mysql> insert into DemoOfVertical(Name) values('Bob'); Query OK, 1 row affected (0.18 sec) mysql> insert into ... Read More
In this program we will see how to find the gray code from an 8-bit number.Problem StatementWrite 8085 Assembly language program to convert an 8-bit number stored at 8000H to its equivalent gray code. The result will be stored at 8050H.DiscussionIn this program we are converting binary to gray code. The procedure is simple. At first we have to shift the content to the right, then perform XOR operation with the sifted content and the actual content. Thus we will get the gray code. For an example if the number is ABH, then the binary value will be (1010 1011), ... Read More
A helical antenna is another type of wire antenna, which is widely used for a higher range of broadband VHF and UHF applications. The frequency range of operation of the helical antenna is around 30MHz to 3GHz.Helical antenna or helix antenna is the antenna in which the conducting wire is wound in a helical shape and connected to the ground plate with a feeder line. It is the simplest antenna which provides circularly polarized waves and used in extra-terrestrial communications in which satellite relays etc., are involved.It consists of a helix of thick copper wire or tubing wound in the ... Read More
The limit of auto_increment integer depends on column data type. Displayed as follows:The data type TINYINT range is 127 The data type UNSIGNED TINYINT range is 255 The data type SMALLINT range is 32767 The data type UNSIGNED SMALLINT range is 65535 The data type MEDIUMINT range is 8388607 The data type UNSIGNED MEDIUMINT range is 16777215 The data type INT range is 2147483647 The data type UNSIGNED INT range is 4294967295 The data type BIGINT range is 9223372036854775807 The data type UNSIGNED BIGINT range is 18446744073709551615Let us take an example of TINYINT. If you will give beyond 127, then ... Read More
A procedure should be followed for encrypting an MS Excel. Encryption is nothing but protecting your document from a third party. First, let us look into the definition of encryption.What is Encryption?The word encryption is derived from the Greek word Kryptos means hidden or a secret.There are certain algorithms to use encryption like RSA algorithms and Diffie-Hellman key exchange algorithms.These algorithms led to the use of encryption in commercial and consumer realms to protect data.The password is the best example of encryption.Encryption is used in sending data across all the networks and ATM is also one of the examples for ... Read More
You can use CONCAT() method to concatenate values while IFNULL() method is used to handle NULL values. The syntax is as follows:SELECT CONCAT('anyStringValue:', IFNULL(yourColumnName, 'anyStringValue’)) AS anyVariableName FROM yourTableName;To understand the above syntax, let us create a table. The query to create a table is as follows:mysql> create table ConcatValues -> ( -> Id int NOT NULL AUTO_INCREMENT, -> FirstName varchar(20), -> MiddleName varchar(20), -> LastName varchar(20), -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command. The query is as follows:mysql> insert ... Read More
IT sector is an ever-growing industry and there is always a demand for good IT graduates in the industry. It is very important to know about the opportunities before you make a decision about your career.Jobs in Core IT sectorDevelopment of software using various computer languages and programming.Hardware support and programming, maintenance of hardware to support the developers and project managers is a more challenging and more important job for the IT professionals.Developing new sites, networking and testing are the booming career paths in IT.Providing database support, Database administration, backup of the data, these all come under database management which ... Read More