Light and illumination - DIY In this article you will find out why the photographic studios do not use the fluorescent lighting, as well why LEDs have not taken over the world yet, and has it been worth to use them for street lighting. Let's go! Color and spectrum We all know that our eyesight is primitive and ternary: we have three types of color receptors, such as red, blue and green. However, the life is more complicated as usual, and the color is determined by the length of wave / energy of a light quantum. To make it clearer: the eye cannot distinguish if the object reflects pure yellow light (580nm) or the green (520nm) and red (680nm) simultaneously. The reality is much more complicated than simply RGB. Defective illumination If any of you was involved in printing photos at home with a red light bulb, you might have noticed that all the items that do not reflect the red light appear black. The main characteristics of the lamps 1. The main types of the lamps 1. 2. 3. 4. They are most inexpensive. 5. 6. Conclusion
Visual Trace Route Tool - Find, Track, and Map the Route to an IP Address Awaiting IP trace initialization. The visual tracert tool displays the path Internet packets traverse to reach a specified destination. The tool works by identifying the IP addresses of each hop along the way to the destination network address. To get more specific info about an IP address you can use this IP tracer tool from IP-Tracker.org. The estimated geophysical location of each hop is identified using MaxMind's GeoIP database. Concerning trace routes The Internet is a large and complex aggregation of network hardware connected together by gateways. Every time a host forwards a packet, it decrements the TTL value of the packet by one. A “trace route” works by increasing the TTL value of each successive packet sent. Unfortunately for those performing trace routes, sometimes hosts will just drop the last packet and not return a destination unreachable response. It is important to note that Internet Protocol (IP) does not guarantee that all the packets take the same route.
Wiki / Jobs You can select what type of results 80legs generates for you. Available options are: Unique and total count - 80legs outputs the # of unique matches and total # of matches for your content selection strings (i.e., keywords or regular expressions)Boolean array - 80legs outputs the two numbers above plus a 1 or 0 for each string, depending on whether or not that string was foundCount array - 80legs outputs the unique and total count plus the total count for each stringCode results - If you select to analyze content using code, result type will default to this option Here are some examples of each result type. In these examples, we've crawled and analyzed two pages: The contents of the first page are 'test1 test1 test2 test3 test5'. test test1 test2 test3 test4 test5 test6 For 'Unique and total count' the output will be: For 'Boolean array' the output will be:
LZMA - Wikipedia Un article de Wikipédia, l'encyclopédie libre. LZMA, pour Lempel-Ziv-Markov chain-Algorithm, est un algorithme de compression de données sans perte en développement jusqu'à 2001 et utilisé dans le format 7z du programme 7-Zip, StuffitX et quelques autres archiveurs, ainsi que et par les commandes dédiées à la compression de données, xz et lzma. Il utilise une compression avec dictionnaire assez similaire au LZ77 et offre un fort taux de compression (en général plus fort que le Bzip2) et une taille variable de dictionnaire de compression (jusqu'à 4 Go). Outre son taux de compression plus élevé, il a le double avantage d'être plus rapide que bzip2 pour les taux de compression faible, mais surtout d'être plus rapide que celui-ci lors de la décompression et à un taux de compression supérieur. En revanche il a l'inconvénient d'être très lent et gourmand en mémoire durant la compression avec des taux de compression élevés. Usages[modifier | modifier le code] Licence[modifier | modifier le code]
Online Visual Traceroute Map Data Map data ©2017 Google, INEGI Map Satellite Visual traceroute may have misplaced routers. Free Network Trace Test Are you having network problems? Monitis visual traceroute is a free diagnostic tool that displays the path the Internet packets take across IP networks to reach a specific destination on a network. You will get a report identifying the approximate geophysical location of each hop and visualizing the route on Google maps. Perform a tracert test from around the world right from your browser Diagnose network connectivity problems Identify routers that are experiencing high latencies Get the most out of your Monitis experience.
Remove Skype Chat History for Single Contact Introduction I wanted to clear the Skype chat history for a single user, but Skype only allows you to clear the complete chat history, not a single user's contact history. I searched for 3rd party tools on the net but nothing worked for me on Windows 7 / Skype 4.1 At the beginning, I knew nothing about how Skype stored chat history and just entered my username and password to login and chat with friends. After spending a few hours asking Google many questions, I found that Skype was using the following SQLite database to store its messages. System Drive:\<Current User’s application data folder>/Skype/<Skype username>/main.db I tried to read it with SQLitespy, but it was a pain to find and clear messages each time. Using the Code First of all, I had to find a method to deal with an SQLite database file using C#. Reference System.Data.SQLite.dll (Located in C:\Program Files\SQLite.NET\bin\System.Data.SQLite.dll) to allow C# to deal with the SQLite database file.
Why I'm Learning Node As many (if not all) of you know, I'm a Python guy. I program every single day, and most days, that involves using Python. I write Django code for fun and profit, and also do a fair amount of "raw" Python coding (no frameworks). Unfortunately, while I do a lot of kick ass back end coding, I don't often get a chance to practice my front-end kung fu. Since I'm fairly knowledgeable about the back end stuff I work on (telephony services, web services, etc.), it doesn't often make sense for me to also build the front end code (I'm looking at you: HTML, CSS, Javascript). As a result of this lack of front-end coding practice, I suck at it. I suck at HTML, CSS, and most of all, Javascript. Over the past few years, my lack of front end knowledge has really began to bother me. Since I first started writing websites, Javascript has really changed a lot. So, after many years of not properly learning Javascript--I decided to take it seriously and dive in.
Tor (anonymity network) Tor (previously an acronym for The Onion Router)[4] is free software for enabling online anonymity and censorship resistance. Tor directs Internet traffic through a free, worldwide, volunteer network consisting of more than five thousand relays[5] to conceal a user's location or usage from anyone conducting network surveillance or traffic analysis. Using Tor makes it more difficult to trace Internet activity, including "visits to Web sites, online posts, instant messages, and other communication forms", back to the user[6] and is intended to protect the personal privacy of users, as well as their freedom and ability to conduct confidential business by keeping their internet activities from being monitored. The term "onion routing" refers to layers of encryption, nested like the layers of an onion, used to anonymize communication. In 2013, Jacob Appelbaum described Tor as a "part of an ecosystem of software that helps people regain and reclaim their autonomy. Steven J.
VIM Adventures Exploring Backbone: Part 1 | Blog :: The JavaScript Playground Backbone.js is a framework that lets us structure our applications using a pattern similiar to MVC (technically Backbone is not pure MVC as the C stands for "Collection"). However, Backbone is a powerful system to use when creating apps that are beyond very basic. When passing & manipulating a lot of data, you should consider using something like Backbone. Since launching this blog I've had a lot of people ask me about Backbone. Although there are a lot of very good resources out there, I have struggled to get to grips with it myself and from the requests I've had I'd suggest a lot of others have too. So, I sat down to create a sample application with Backbone, and in this tutorial - which will span at least 3 parts - we will create a very simplified shopping cart application, with Backbone. The first thing to do is set up our basic page and include our dependencies. <! The first thing we want to do is create a model. Here I set up the default values for my item. Don't panic! That's it.