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  Some laws of interactive design

The well known quote from Alan Cooper is   Conforming to the standard unless there is a better choice. There are some best practices in interaction design. How many do you know? 1. Fitts' Law The time from one start point to target point is determined by two parameters: The distance to the target and the size of the target. )D and W in above picture), the formula is : T=a+blog2(D/W+1). It was first proposed by Paul Fitts, it is mathematical model used to predict the time from any poin...

   interaction design, laws, Fitts' law     2012-11-16 11:25:24

  Amazon unveils 8.9" Kindle Fire HD

Amazon today unveiled 7 products of Kindle family, including the $69 new Kindle; Kindle Paperwhite WiFi/3G, priced at $119 / $179; 7-inch Kindle Fire regular edition/HD version, $159/$ 199; 8.9inch Kindle Fire HD with WiFi/4G Edition at $299 /$499. However, the Amazon phone did not show up. The 8.9-inch Kindle Fire HD is today's highlight, because it looks real similar to iPad. Kindle Fire HD has the following features: 1920 x 1200 resolution, 254PPI Texas Instruments OMAP 4470 proce...

   Amazon,Kindle Fire HD,tablet     2012-09-06 19:12:05

  How does PHP session work?

This article is about how PHP session works internally. Below are the steps : 1. Session in PHP is loaded into PHP core as an extension, we can understand it as an extension. When session extension is loaded, PHP will call core functions to get the session save_handler, i.e interface or functions for reading and writing session data. By default, PHP will handle session data by writing and reading files on the server. But PHP also supplies custom methods for handling session data, we can use sess...

   PHP, session, mechanism     2012-12-28 13:36:49

  Some famous product release venues

About product release conference, you must remember Apple Worldwide Developers Conference(WWDC), right? But do you remember where the conference is held? Actually, when companies release new products, they will hold some kind of conferences or sessions to introduce their products. But does anyone know what are the places where these conferences are held? Here geekpark summarized some product release places for us. 1. Moscone West Convention Center Moscone West Convention Center is the biggest co...

   Conference, Place,Product release     2012-10-11 20:32:22

  eLearning Can Improve How Educators Approach Learning

eLearning has varied benefits for learners, as has been amply documented across numerous articles on the web. It allows learners to gain access to quality education from the comforts of their homes, according to their convenience. It allows them to focus on their other interests and education at the same time.  When it comes to educators, there’s a dearth of documentation of the positive impacts of eLearning on their work. eLearning has revolutionized the entire learning process, and ...

   ELEARNING     2022-01-29 04:01:23

  What will the value of Integer.valueOf(127) == Integer.valueOf(127) be in Java?

Do you really understand how Java does the integer comparison? OK, ignore the statements in the post title. What we are interested in is another set of comparison statements. Let's first see below code snippet. public class IntegerComparison { public static void main(String[] args) { Integer a = 127, b = 127; Integer c = 128, d = 128; System.out.println(a == b); System.out.println(c == d); } } What do you think the output will be? Are they both displaying true? You will find out t...

   JAVA,==,EQUALSTO     2018-01-13 22:18:15

  The first 30 tweets on Twitter

Six years ago, we didn't know what a tweet was. But now, there are 340 million tweets posted every day. Looking back, do you know what are the earliest tweets on Twitter when it was released? Let's check them out. Before that, let's check Twitter's background first. Six years ago, Twitter was called twttr (similar to Flickr), the earliest version was similar to an SMS broadcast service, i.e sending short message to friends to tell them what I am doing. It was put online on 22nd October, 2006, J...

   Twitter,history,story     2012-10-11 20:03:22

  30-Minute Exercise to Become a Better Programmer

I believe that motivation is really important. That’s why from time to time I read books about time management (as they motivate me to be focused and continue evolve my TM-system) and books about software craftsmanship. The other day I finished one of this kind of books - “Apprenticeship Patterns: Guidance for the Aspiring Software Craftsman”. This book motivated me to think carefully what I want to invest my time in. Also, it coincided with my 25th birthday and, of co...

   Programmer,Exercise,Skill,Requirements     2012-01-28 07:21:13

  7 revolutionary electronic products

Electronic products can be seen everywhere in our lives. There are several revolutionary electronic products which affect people's life deeply. The following are seven representative electronic products.1. Motorola DynaTACIt is the ancestor of cellphone. DynaTAC is a series of cellular telephones manufactured by Motorola, Inc. from 1983 to 1994. The first model, the 8000x, received FCC certification in 1983,and became the first cell phone to be offered commercially. It weighs 2.5 pounds and can ...

   Electronic products,iPod,ATARI,DynaTAC     2012-07-31 14:27:33

  In College, Working Hard to Learn High School Material

In June, Desiree Smith was graduated from Murry Bergtraum High. Her grades were in the 90s, she said, and she had passed the four state Regents exams. Since enrolling last month at LaGuardia Community College in Queens, Ms. Smith, 19, has come to realize that graduating from a New York City public high school is not the same as learning. She failed all three placement tests for LaGuardia and is now taking remediation in reading, writing and math. So are Nikita Thomas, ofBedford Stuyves...

   Education,College,High school,Material,Knowledge transfer     2011-10-24 11:51:39

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