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mmCalc
mmCalc is a 35mm lens equivalent and crop factor calculator. Simply input your lenses focal length, the size of your sensor, and what the maximum aperture of your lens is and we will give you what the lens would be in terms of 35mm. mmCalc also provides a crop factor calculator that allows you to input the dimensions of your sensor and find out what the exact crop factor is. If you're unable to calculate for your lens with the pre-defined values, we also provide a completely customizable calculator that allows you to input your own crop factor, aperture, focal length, and even sensor dimensions.
crop  calculator  photography  camera  lente  utilidade  f_stop  aperture  comparação 
july 2019 by rtopitt
Bicycle Rolling Resistance | Rolling Resistance Tests
Welcome to Bicycle Rolling Resistance. Bicycle Rolling Resistance is a website dedicated to giving insight into the rolling resistance characteristics of road bike, mountain bike, touring bike, and fat bike tires. We built our own bicycle tire rolling resistance test machine that will be used to test all sorts of bicycle tires and components.
bicycle  tire  review  comparação  teste  cycling  reference 
january 2018 by rtopitt
GreenOnion | UI testing/diffing tool
GreenOnion records 'skins', which are snapshots of the current state of a view (or any page that a browser can navigate to). The first time that it is run on a view, it saves the skin; the second time that it is run, it will compare the first skin to the fresh (new) skin. You can either compare with a diff image that is automatically created, or by an outputted percentage of difference.
ruby  rspec  tdd  bdd  interface  ui  diff  gem  comparação 
march 2015 by rtopitt
Road Drop Bar Geometry : La Rueda Tropical
Which drop bar shape and size is best? That depends on your anatomy, conditioning, position on the bike, type of riding you do, how your bike is equipped and your bike’s geometry. One cyclist’s ergonomic heaven is another’s hell. I’ve assembled samples of a representative range of most of the traditional road bar geometries together with current production shapes. I’ve omitted anatomic bars as I’ve never found one that fits my anatomy, so apologies to fans of anatomic bars. - See more at: http://ruedatropical.com/2009/03/road-drop-bar-geometry/#sthash.5vdeJ1mq.dpuf
bicycle  cycling  drop_bar  handlebar  comparação 
august 2014 by rtopitt
VooLogico - Modo fácil de escolher passagem.
Pesquisador de preços de passagem RIO (Santos Dumont ou Galeão) => ???
pesquisa  passagem  avião  rio_de_janeiro  sdu  gig  aeroporto  preço  comparação  viagem 
march 2014 by rtopitt
Backblaze Blog » What Hard Drive Should I Buy?
They asked what drive models work best and which last the longest. Given our experience with over 25,000 drives, they asked which ones are good enough that we would buy them again. In this post, I’ll answer those questions.
backup  hardware  hd  disco  marca  comparação  qualidade  hitach  seagate  western_digital  tip  storage 
january 2014 by rtopitt
Lift's Quantified Diet | Join the Largest Crowdsourced Randomized Trial on Diet
Join the largest randomized trial of popular diet.

Let's challenge the diet industry's fuzzy claims about what diets actually work. You'll get healthier, plus you'll help pioneer a new way to do science research on a large scale that hasn't been possible before. We're designing the study with advice from researchers at UC Berkeley and Stanford.
dieta  teste  alimentação  app  ios  controle  comparação  geek  application  food 
january 2014 by rtopitt
Choosing an OSS license doesn’t need to be scary - ChooseALicense.com
Site do GitHub para auxiliar na hora de escolher uma licença para projeto open source / software livre
licença  legal  software_livre  escolha  comparação  help 
august 2013 by rtopitt
RailsDiff
When upgrading the version of Rails used in an application, it can be difficult to know precisely every detail that should be changed.

So, to that end, I've generated applications for each version of Rails; and, for each version, I've generated a diff between it and all versions before it. You can use these diffs to know precisely every change needed to upgrade to any version of Rails.
rails  upgrade  diff  importante  comparação  esqueleto  atualização  ruby  reference 
june 2013 by rtopitt
Big-O Algorithm Complexity Cheat Sheet
This webpage covers the space and time Big-O complexities of common algorithms used in Computer Science.
cs  complexidade  cheat_sheet  tabela  comparação  reference  algorithm  programming 
may 2013 by rtopitt
Wufoo · The Current State of HTML5 Forms
Browser support for the different features of HTML5 forms is quite varied. Let's explore.
html5  webdesign  formulário  comparação  navegador  html  css3 
april 2012 by rtopitt
Ruby HTTP clients features
Comparação de características de todas as bibliotecas HTTP em Ruby
ruby  http  biblioteca  gem  comparação 
april 2012 by rtopitt
41Latitude - Google Maps & Label Readability
Why Do Google Maps’s City Labels Seem Much More “Readable” Than Those of Its Competitors?
google  mapa  design  webdesign  comparação  yahoo  tipografia  visual  analysis  tip 
december 2010 by rtopitt
How to Use Your Zoom Lens as a Compositional Aid
You can see this principle illustrated really nicely in the images above. While the model takes up much the same amount of space in each of the shots – the five different focal lengths product quite different compositions. None are particularly ‘bad’ photos – but each produces very different results.
zoom  comparação  importante  inspiração  composição  tip  photo  photography 
november 2010 by rtopitt
Paris vs New York, a tally of two cities
A visual but friendly match between those two cities seen by a lover of Paris wandering through New York's infinite details, clichés and contradictions : this way, please.
paris  nova_york  blog  comparação  design  desenho 
november 2010 by rtopitt
Battle of the Android Music Players: The Best Alternative Players Compared
Android's default music player works, but it's nothing to write home about. If you're looking for a more feature-filled player, here's a rundown of four of the best music players available in the Android Market.
android  review  comparação  celular  player  música  app  application 
september 2010 by rtopitt
Receiving Incoming Email in Rails 3 – choosing the right approach « Steve @ DynamicEdge
When it comes to sending mail in Rails there are plenty of solutions and the best practices are fairly widely known. There are also a number of third party systems that can help you out. Receiving email in Rails however is a slightly less documented prospect.
email  smtp  imap  polling  how-to  recebimento  rails  3  curl  webservice  review  comparação  tip 
september 2010 by rtopitt
pHash.org: Home of pHash, the open source perceptual hash library
A perceptual hash is a fingerprint of a multimedia file derived from various features from its content. Unlike cryptographic hash functions which rely on the avalanche effect of small changes in input leading to drastic changes in the output, perceptual hashes are "close" to one another if the features are similar.
phash  hash  comparação  imagem  multimedia  biblioteca  software_livre  geek  video  programming 
august 2010 by rtopitt
Detecting Duplicate Images with Phashion
Recently I was given a ticket to implement a “near-duplicate” image detector. The original image files have different bytesizes and different sizes but they show essentially the same thing. This is what we call a “near-duplicate” and the problem was that when displaying an automatically generated image gallery for a given subject, we were sometimes showing duplicate images due to slight differences in the images. Obviously we can’t use something like an MD5 or SHA1 fingerprint – we have to create a fingerprint based on the content of the image, not the exact bytes. This is what the pHash library does.
ruby  gem  biblioteca  phash  geek  comparação  duplicidade  imagem  similar  hash  programming 
august 2010 by rtopitt
Adobe's Content Aware Fill.. huh? GIMP already had it for years | Linuxers
But GIMP is actually years ahead of Adobe's "state of art" technology. It had the same feature in the form of a plugin, Resynthesizer, by Paul Harrison. Check it out.
gimp  photoshop  software_livre  geek  plugin  plágio  cópia  comparação  editor  edição  imagem  video 
april 2010 by rtopitt
Image Forensics : Error Level Analysis
If you’ve ever wondered just how much editing goes into a particular photograph, there’s now a super easy way to find out for yourself. Image Error Level Analyser is a simple web application that takes a URL to a JPEG photo and returns an image showing differing “error levels” in the image. Thus, you can now investigate any JPEG you find on the Internet to see roughly how much the photograph has been edited or manipulated. The app even gives you a permalink to the resulting image comparison.
hack  photoshop  online  python  jpg  ferramenta  edição  fake  comparação  forense  falso  inspiração  webapp  url  analysis 
february 2010 by rtopitt
Photoshop Miracle - Home
1 picture after photoshop, 1 picture before photoshop. Clear. Simple. Fake.
photoshop  fake  comparação  edição  bizarrice  celebridade  photo  photography 
february 2010 by rtopitt
Softies on Rails: Waterfall, Scrum, and Kanban, Oh My
I thought I’d write up my thoughts on the various organizational processes I’ve been subjected to over the years. I’m currently on the Kanban wagon but I haven’t completely figured it out yet.
xp  agile  scrum  kanban  waterfall  modelo  processo  comparação  pró  contra  organização  projeto  paradigma  programming 
february 2010 by rtopitt
SpiderPic
Price-comparison search engine for Stock Photography
busca  compra  comparação  preço  stock  photo  photography  gallery 
january 2010 by rtopitt
Review: iPhone headsets Review | Headphones | Macworld
Upgrading your iPod’s headphones is the easiest way to improve your on-the-go music listening. But when it comes to the iPhone, upgrading isn’t as simple a task, because the iPhone’s stock earbuds are more than just headphones. They include an inline microphone for talking on the phone, and an inline controller for taking and ending calls and for basic music-playback control. In addition, the iPhone’s recessed headphone jack means that not all headphone plugs will fit. If you’ve already got a favorite set of headphones, we recently reviewed a number of headset adapters that add the microphone and controller button along with an iPhone-compatible plug. But if you’re in the market for new headphones and want those features built-in, you need a true iPhone headset.
iphone  headphone  review  comparação  top10  fone  wishlist  earphone  música  audio 
january 2010 by rtopitt
Snapsort
You can compare any two cameras to see which one might be better for you. Snapsort searches the web for information about the latest camera models, and summarizes the differences and similarities between cameras for you.
câmera  digital  review  comparação  webapp  funcionalidade  photography 
january 2010 by rtopitt
Why I think Mongo is to Databases what Rails was to Frameworks // RailsTips by John Nunemaker
Below are 7 Mongo and MongoMapper related features that I have found to be really awesome while working on switching Harmony, a new website management system by my company, Ordered List, to Mongo from MySQL.
rails  mongodb  top10  funcionalidade  nosql  mysql  comparação  documento  ruby  mongomapper  tip 
december 2009 by rtopitt
Vector VS 3D VS Photos. Can you see the difference? « FrancescoMugnai.com
Here you have a list of subjects divided into three categories: photorealistic vectors, photorealistic 3D models and….normal photos. Can you see the differences? Can you guess which is vector? And which is a normal picture?
3d  vetorial  comparação  geek  ilustração  photography  gallery 
december 2009 by rtopitt
Journal of Eivind Uggedal: VPS Performance Comparison
My latest side project, was it up?—a free web monitoring service, required a number of VPS instances due to its distributed nature. I previously conducted a comparison of Slicehost and Prgmr. This time I needed to purchase several instances and therefore went out and did a more throughout and wider comparison of which VPS provider would give me the most bang for my buck. I targeted VPS offerings in the $20 space (and the cheapest Amazon EC2 option). Summarizing the benchmarks gives us one clear winner: Linode.
vps  benchmark  review  comparação  linode  linux  hospedagem  performance  server 
november 2009 by rtopitt
steffenbartsch — Rails Authorization Plugins
For restricting the access rights of the individual users, i.e. authorization, the situation is different with lots of alternatives. This is probably due to the varying requirements that projects have in the case of authorization. While there are lists and surveys of Rails authorization plugins, I was missing an overview that could help in the decision making process of choosing the right plugin for my specific requirements. I tried to examine each plugin according to a few aspects.
rails  plugin  autorização  top10  lista  comparação  review  acl  security 
november 2009 by rtopitt
the ragbag - arial & helvetica on friday, i hosted a screening...
so to help ignite the post-viewing dialogue, i made this supplement illustrating the key differences in letterforms.
arial  helvetica  fonte  tipografia  comparação  gráfico  geek  design 
september 2009 by rtopitt
[Off-Topic] Comprei meu primeiro Mac, e agora? - AkitaOnRails.com
Uma porrada de dicas de como fazer as coisas no Mac OS X, as diferenças com Linux e Windows, vários atalhos de teclado, recomendações de programas, etc.
apple  mac_os_x  atalho  teclado  comparação  importante  how-to  app  application  tip  recomendation 
july 2009 by rtopitt
AnandTech Bench (beta): SYSMark 2007 - Overall
The first incarnation includes CPU performance data in SYSMark 2007 for nearly all current AMD and Intel CPUs. Over the coming weeks we will add results for all of our standard CPU benchmarks.
cpu  processador  comparação  hardware  review  webapp  intel  amd 
may 2009 by rtopitt
Nimble Method: The future of Rails is Ruby 1.9 - real performance of 1.8, JRuby and 1.9 compared
We ported Acunote - our online enterprise project management and Scrum software to both JRuby and Ruby 1.9 and ran our set of performance benchmarks. Ruby 1.9 is 2x faster than 1.8. But the real world improvements are even better.
ruby  performance  jruby  1.9  comparação  rails  benchmark 
may 2009 by rtopitt
blablabra - O que o Brasil anda twittando?
Você sabe o que o Brasil anda twittando? Este site monitora o conteúdo do Twitter que está em português. Buscas, comparações de palavras e hashtags, gráficos.
busca  twitter  brasil  português  gráfico  comparação  geek  palavra  tag  hashtag 
may 2009 by rtopitt
Linux.com :: Three photo mosaic apps compared
Photo mosaics are recreations of one large image composed of tiny tiles of other smaller images. We compared three easy-to-use Linux-based utilities for generating photo mosaics -- Pixelize, Metapixel, and Imosaic -- on speed, quality, and other factors.
comparação  how-to  linux  metapixel  mosaico  programa  review  photo  photography 
may 2009 by rtopitt
Why Git is Better Than X
This site is here because I seem to be spending a lot of time lately defending Gitsters against charges of fanboyism, bandwagonism and koolaid-thirst. So, here is why people are switching to Git from X, and why you should too. Just click on a reason to vi
comparação  controle_de_versão  geek  git  melhor  repositório 
may 2009 by rtopitt
Sneaky Abstractions: JavaScript Eye for the Ruby Guy
This article is an introduction to JavaScript for those who already know Ruby. Its focus is mostly on the differences between the two. JavaScript and Ruby are very similar in many respects, but they’re also very different in some areas. Both languages a
artigo  comparação  javascript  linguagem  ruby  learning  programming 
may 2009 by rtopitt
Main Page - WikiVS - the one stop for up-to-date comparisons
WikiVS allows you to see how things compare directly with each other, instead of leaving you to arbitrary ratings, stars, and smiley faces. Get up-to-date comparisons. No digging through long threads. Contribute to comparisons. No flame wars.
comparação  geek  informática  wiki 
may 2009 by rtopitt
GIMP - Converting Color Images to B
Diferentes técnicas de conversão de imagens coloridas para preto e branco usando o Gimp
comparação  conversão  cor  gimp  how-to  pb  tip  photography 
may 2009 by rtopitt
Seek or Show: Two Design Paradigms for Lots of Data « Theresaneil’s Weblog
Here are two design paradigms for handling large amounts of data, not to be confused (or combined) as web design meets desktop in rich Internet applications. This would seem self explanatory, except that the Seek (Search) paradigm is typically used in web
artigo  busca  comparação  design  gui  importante  interface  padrão  view  webdesign  analysis 
may 2009 by rtopitt
About This Blog: Beanstalk Messaging Queue | Ruby on Rails for Newbies
Explicação de processamento assíncrono e porque o carinha escolheu o beanstalkd
artigo  assíncrono  beanstalkd  blog  comparação  how-to  queue  rails  ruby  tip 
may 2009 by rtopitt
Dev logger: Ruby programming is art
I realize that the Ruby language is special, in the sense that my learning curve is experienced differently than it was with Java, or even C back then. Specifically, I find that beyond learning the basics in Ruby, the programmer's creativity is much mor
arte  artigo  código_fonte  comparação  ruby  programming 
may 2009 by rtopitt
Coding font roundup « :ski_on_rails
Comparação de fontes usadas para programação (fontes mono-space)
comparação  fonte  geek  pdf  png  programming 
may 2009 by rtopitt
Jay Fields' Thoughts: Alternatives for redefining methods
Ruby's open classes allow you define and redefine behavior pretty much at will
best_practice  comparação  dinâmica  método  objeto  ruby  tip  programming 
may 2009 by rtopitt
Phoronix Test Suite - Linux Testing
The Phoronix Test Suite is the most comprehensive testing and benchmarking platform available for Linux and is designed to carry out qualitative and quantitative benchmarks in a clean, reproducible, and easy-to-use manner. The Phoronix Test Suite can be u
benchmark  comparação  linux  performance  teste 
may 2009 by rtopitt
How to Develop a Sense of Scale | BetterExplained
A sense of scale helps us better understand the world, and convey ideas more effectively. What’s more impressive?
artigo  comparação  escala  geek  senso  video 
may 2009 by rtopitt
PassMark CPU Benchmark Charts
PassMark Software has delved into the thousands of benchmark results that PerformanceTest users have posted to its web site and produced five Intel vs AMD CPU charts to help compare the relative speeds of the different processors.
benchmark  comparação  cpu  hardware  processador  teste 
may 2009 by rtopitt
The Great Ruby Shootout | Zen and the Art of Ruby Programming
Comparação de performance entre Ruby 1.8.6 (MRI), Ruby 1.9 (Yarv), JRuby, Rubinius e XRuby
1.9  benchmark  comparação  jruby  performance  ruby 
may 2009 by rtopitt
Gran Turismo 5/Gran Turismo 5 Prologue : The Quizz
Teste para tentar diferenciar a imagem da vida real para a imagem tirada do Gran Turismo 5
comparação  geek  gran_turismo  imagem  playstation  ps3  quiz  teste  videogame 
may 2009 by rtopitt
warpedvisions.org » Blog Archive » Ten things Linux distros get right (that MS doesn’t)
I use Windows and Linux every day. They’re both competent operating systems, each with reasonable applications and windowing systems. I find myself more productive on a Linux system, though, because of a few very simple differences. So what are the diff
comparação  geek  linux  top10  windows 
may 2009 by rtopitt
VentureCake » Blog Archive » Ubuntu now bigger than Jesus
Ubuntu is the first Linux distribution to overtake Jesus in Google Trends, establishing a firm lead over the bearded one since the end of Q1 this year.
bizarrice  comparação  geek  google  hahaha  jesus  trend  ubuntu 
may 2009 by rtopitt
Javascript - Event compatibility tables
On this page I give a quick overview of events browser compatibility. | Compatibilidade dos eventos javascript entre diversos navegadores
comparação  javascript  navegador  suporte  webapp 
may 2009 by rtopitt
Comparison of different SQL implementations
The goal of this page — which is a work in progress — is to gather information relevant for people who are porting SQL from one product to another and/or are interested in possibilities and limits of 'cross-product' SQL.
comparação  db2  mysql  oracle  padrão  postgresql  sql  sql_server  database 
may 2009 by rtopitt

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