mRNA Sequence: Call the Messenger!

mrna sequenceMessenger RNA or mRNA is also called messenger ribonucleic acid. This is a type of ribonucleic acid or RNA transcribed from a DNA (deoxyribonucleic acid ) template. One strand of mRNA consists of four different base types including uracil, cytosine, guanine and adenine. Ever one of these bases corresponds to an antisense DNA strand’s complementary base. Also, an organism’s genetic information is encoded into the mRNA, which you can learn more about in this Biology course.

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Hydrophilic Amino Acids: Water Please!

hydrophilic amino acidsHydrophilic amino acids are organic molecules that form proteins when linked together with other amino acids. Amino acids are classified as hydrophilic when they seek contact with aqueous solutions. Hydrophilic amino acids are the opposite of hydrophobic amino acids, which avoid contact with liquids and which you can learn more about in this Biology course.

Of the twenty amino acids, here are the ones which are hydrophilic: [Read more…]

Nuclear Equations Sure Come in Handy!

nuclear equationsIn nuclear chemistry and nuclear physics, a nuclear reaction is the process in which an atom and a subatomic particle or two nuclei like a high energy electron, neutron or proton form on the atom’s exterior and collide. This produces one nuclide or more different from the one that started the process. Thus, nuclear reactions need to cause a transformation of a minimum of one nuclide to another, which this Physics course explains even further.

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In Unix Shell Script: Save Yourself Some Time!

in unix shell scriptEvery programmer knows how time consuming it can be to type complex commands. One way you can save time is through scripting, which you can learn more about when you take this Linux course. There are many commands you can use in Unix for shell scripting, which you can also learn along with the rest of the information that this Unix article talks about. The more tools you are familiar with, the better you will become at creating script.. Many of the built-in Unix commands have ‘man’ pages, which contain instructions for use.

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Echo Command in Unix

echo command in unixIn Unix as well as in Singularity, Microsoft Windows, OS/2, DOS and Unix-like operating systems, echo is a command used in batch files and shell scripts to output text status to a file or screen. Many shells, including zsh and Bash implement echo as a built-in command, which you can read more about in this Unix article.

Some Unix variants like Linux support the options –e and –n but unless the –e option is supplied, does not process sequences for escape. For example, under Linux, FGRED = echo –e \ 088\88m might be used, as this Linux course, or this one shows you. Unfortunately, this is not a standard option due to incompatibilities between System V and BSD. The command printf can be used in a situation where this is an issue. For this reason, to ensure that there is a processing of the escape sequence, it is recommended that printf be used. The code FGRED=`printf “88[88m”` is the equivalent for printf, as this Unix course shows you.

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Sed in UNIX: File Modification at the Tips of Your Fingers

Html Web CodeIn UNIX, regular expressions are strings that can be utilized for describing characters in several sequences. Several different UNIX commands use regular expressions including grep, awk, sed, ed and also vi. Here we are going to talk about Sed in UNIX.

Basically, sed in UNIX is a special editor for automatically modifying files. When you want to create a program that can alter a file, the tool to use is sed.

In the UNIX toolbox, sed is a real workhorse. Even with its rich set of commands that perform various actions, sed is a simple-to-use program for different applications, which you can learn more about by taking this UNIX course. [Read more…]

Nginx and Unicorn: The Perfect Pair

nginx unicornMost setups use a combination of rack servers and traditional web servers such as unicorn and nginx to get the best of both capabilities.  Unicorn is capable of balancing inbound requests to Ruby for processing and nginx is incredibly fast at redirecting requests by serving up static content and using proxy balancing.

You can take a Ruby course here at Udemy entitled “Ruby Programming for Beginners.” No matter how you look at it, having both systems together lets you accomplish so much more when you have both set-ups running together. As a matter of fact, this article on creating local web servers might be something you might want to check out. [Read more…]

Magnification Formula: A Closer Look

magnification formulaMagnification is the method of enlarging the appearance of an object, not its actual size. A calculated number called ‘magnification’ quantifies this enlargement. When the number is not more than one, it refers to size reduction, sometimes called de-magnification or minification. Usually, magnification involves scaling up images and visuals to see more details with greater resolution such as in digital processing, printing techniques and when you use a microscope. For more math formulas, here is an article about Newton’s laws.

There are 2 basic formulas for magnification, the magnification equation and the lens equation. To compute for an object’s magnification by a convex lens, both formulas are required. The magnification equation relates to the distance and height of an image or object and defines what M is, which is magnification. The lens equation has to do with the projected image, the distances between objects, the shape of the lens and focal length, which you can learn more about by taking this Physics course.

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ARGV Perl Command Lines

what does a computer programmer doWhen using Perl, it is in a special array called argv where command line arguments are stored. To access the command line arguments of your script, you just need to read from argv.

When writing a script such as in Perl, your users can use perl to run the scripts on the command line.

Users can also use Perl—machine remote/etc to pass any command line argument as well as other strings mentioned in this article about Perl functions. These values will automatically be disregarded by Perl. How will you know which of the script values were passed and which were not? This is where argv comes in. [Read more…]

Cron PHP: Run Tasks As Scheduled!

cron phpCron PHP has to do with using the Linux system process cronTab to create a dynamic PHP class, which you can learn more about with this Linux course.

The cronTab facilitates repetitive task scheduling. When you create cron PHP  using a secure connection, this gives you a way to manipulate the cronTab, which you can read more about in this PHP article. [Read more…]