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F.lux: What Is It and Why You Need It?

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Are you the type of person who frequently works and using computer at night or perhaps maybe watching a movie on your 4k screen or in your mobile devices, in a dim environment for long hours? You may be have not thought of this, but doing so, is unhealthy to your eyes. image source: fromthegrapevine.com Technically speaking, our eyes can see light ranging from ~400 nm to ~700 nm in their wavelenghts. ~400 nm to ~500 nm is part of the blue light , which as shorter wavelengths. Shorter wavelengths means that these contains more energy. and > 500 are the other visible colors and thus, much longer wavelengths and contains less energy. And this energy what I'm talking about is called  electromagnetic radiation.   image source:  https://cdn.mos.cms.futurecdn.net/VvfrExk6RLixUVKNE7JtLN.jpg This electromagnetic radiation is actually group of rays/waves, like gamma rays, x-rays, UV rays, infrared rays, microwave, radio, TV, and other long radio waves. It va...

3 Reasons why you should dual-boot your computer

Most of computer users live their whole life using only a single operating system. Well, this seems to be fine for a "non-techie" users who only use word processing software and spreadsheets like MS Excel at home or office. But in my day-to-day experience using computers, I found that, whether you are tech savvy or not, you would like to consider to this and here are the reasons. 1. Troubleshootin g If you are Microsoft die hard fan, chances are your computer has been infected by a computer virus. And admit it, anti-virus software isn't enough to protect your computer. I encountered a virus that gets executed as the operating system starts. So what I did was to boot my computer to Linux (Linux can read other file system) to delete that virus since it hides in some folders and kept executing making it almost impossible to remove. You can locate and remove it manually using other OS different from the target without reformatting your computer. This process seems to be t...

Removing kpcgrhynko.vbs virus manually

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Ok guys, some of you encountered the virus that creates shortcuts on your flashdrives and hiding the original file. It can be acquired when you insert your USB flashdrive on computers already affected by that virus. Anyway, here's how you can remove that : 1. Open the task manager (ctrl+shift+esc on windows 7 or ctrl + alt + del on XP). 2. Navigate through the process named "wscript.exe" and terminate it to refrain the virus from executing.  3.  Open the command prompt (press windows + r then type "cmd" without the quotes). paste the following code   attrib -s -h -r /d /s G:/*.*    the code above will unhide all the hidden files on your G:/ drive (replace that to the path of your flash drive) 4. Locate the kpcgrhynko.vbs script (or any suspicious .vbs files) and delete it. NOTE: if the kpcgrhynko.vbs still exists, you can always kill the wscript.exe in the task manager to keep that vbs script from executing. 5. Possibly, that virus may ...

Android Bluetooth Serial Communication over SPP Source Code Explained

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I was searching for particular code on how my Android device can communicate with Arduino using HC-05 module. Suddenly, I found this code on this  site . However, this code might seems too arcane to understand 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 package com . example . ledonoff ; import java.io.IOExcep...