Mechanical Ant

Ada Lovelace

2012-10-20T09:52:00.000-07:00

Augusta Ada King, Countess of Lovelace (10 December 1815 – 27 November 1852), born Augusta Ada Byron and now commonly known as Ada Lovelace, was an English mathematician and writer chiefly known for her work on Charles Babbage's early mechanical general-purpose computer, the analytical engine. Her notes on the engine include what is recognised as the first algorithm intended to be processed by a machine; thanks to this, she is sometimes considered the world's first computer programmer.
The computer language Ada, created on behalf of the United States Department of Defense, was named after Ada Lovelace.

"Ada Lovelace Day" is an annual event celebrated on October 16th whose goal is to "raise the profile of women in science, technology, engineering and maths". The Ada Initiative is a non-profit organization dedicated to increasing the involvement of women in the free culture and open source movements.
Wikipedia

Ada Lovelace Day: Women celebrate female scientists - BBC

Ada Lovelace Day Celebrates Women in Science - National Geographic

Celebrate Ada Lovelace Day - CNet

Celebrating Women in Technology for Ada Lovelace Day 2012 - EFF

Programming Optimization and Performance

2012-10-20T08:15:00.000-07:00

Tips, tricks, techniques for C# optimization and performance

Program optimization@wikipedia - first learn its description :)
C# Optimizations@dotnetperls
Optimization Misnomer@dotnetperls
Hidden Features of C#@stackoverflow
How to Write High-Performance C# Code
Code performance analysis in Visual Studio 2008
Improving .NET Application Performance and Scalability@Microsoft (book, you can download)
Writing High-Performance Managed Applications : A Primer@MSDN

Design for Performance vs. Tune for performance@MSDN

Writing Faster Managed Code: Know What Things Cost@MSDN
Performance Tips and Tricks in .NET Applications@MSDN

Best Practise for Improving .NET Application Performance and Scalability

Optimize Your Program Performance@wikihow
http://stackoverflow.com/a/927773 - how a performance tuning can be done
http://stackoverflow.com/a/2473829
Performance@MSDN

Improving .NET Application Performance and Scalability@MSDN

Code optimization tutorial@CodeProject Part I - Part II - Part III

Common C#.NET Performance Guidelines@codeproject

You can use some profiling tools.

Performance explorer shipped with Visual Studio

CLR Profiler

Eqatec

BONUS
Grace Hopper To Programmers: Mind Your NanoSeconds

"The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet." (Michael A. Jackson)

Check out these links. There are good tips.

http://www.codeguru.com/csharp/.net/net_general/performance/article.php/c15879/C-Tips-and-Tricks.htm
http://www.codeguru.com/csharp/article.php/c17967/10-C-Programming-and-Microsoft-Visual-Studio-Tips-and-Tricks.htm
http://www.codeguru.com/csharp/article.php/c17911/7-Common-Mistakes-Made-By-C-Programmers.htm
http://www.codeguru.com/csharp/article.php/c18111/10-More-C-Programming-and-Microsoft-Visual-Studio-Tips-and-Tricks.htm
http://tipsandtricks.runicsoft.com/index.html
http://www.csharpcity.com/optimization-101/
Software Engineering Tips
http://blogs.msdn.com/b/ricom/
http://ivision.wordpress.com/2010/06/08/code-optimization-smart-coding-i/
http://forum.team-mediaportal.com/threads/some-simple-coding-techniques-to-push-c-as-fast-as-possible.937/
http://www.techgalaxy.net/Docs/Dev/5ways.htm
codebetter
http://www.jaftalks.com/Home/Show/Code%20optimization%20remarks
http://csharpcomputing.com/Tutorials/Lesson23.htm
http://geekswithblogs.net/BlackRabbitCoder/archive/2010/08/26/c.net-five-little-wonders-that-make-code-better-1-of.aspx
http://www.vcskicks.com/optimize_csharp_code.php
http://jroller.com/rolsen/date/20060419

Happy coding...

Nao

2012-10-19T17:48:00.002-07:00

Aldebaran Robotics - Nao

Official Site

StringBuilder vs String Concat

2012-10-19T17:01:00.002-07:00

Lets look at StringBuilder class and string '+' operator performances. I wrote a small program that compares execution times and memory usage.

This program concats strings with variety sizes for 1, 10, 100, 1000, 10000, 100000, 1000000 times.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
namespace Test
{
class Program
{
static string[] data = {"a", "ab", "abc", "abcd", "abcde",
new string('f',10),
new string('g',15),
new string('h',20),
new string('i',25),
new string('j',30)};
static void Main(string[] args)
{
StringTest();
//StringBuilderTest();
//StringMemoryTest();
//StringBuilderMemoryTest();
Console.ReadLine();
}
static void StringTest()
{
Stopwatch sw = new Stopwatch();
string collector = string.Empty;
int count = 1;
Console.WriteLine("Loop Time");
for (int i = 1; i <= 7; i++) //1, 10, 100, 1000, 10000, 100000, 1000000
{
sw.Start();
for (int j = 0; j < count; j++)
{
collector = collector + data[j % 10];
}
sw.Stop();
TimeSpan ts = sw.Elapsed;
Console.WriteLine("{0,-12:d}{1:0} ms", count, ts.TotalMilliseconds);
count *= 10;
collector = string.Empty;
sw.Reset();
}
}
static void StringBuilderTest()
{
Stopwatch sw = new Stopwatch();
StringBuilder collector = new StringBuilder();
int count = 1;
Console.WriteLine("Loop Time");
for (int i = 1; i <= 7; i++) //1, 10, 100, 1000, 10000, 100000, 1000000
{
sw.Start();
for (int j = 0; j < count; j++)
{
collector.Append(data[j % 10]);
}
sw.Stop();
TimeSpan ts = sw.Elapsed;
Console.WriteLine("{0,-12:d}{1:0} ms", count, ts.TotalMilliseconds);
count *= 10;
collector = new StringBuilder();
sw.Reset();
}
}
static void StringMemoryTest()
{
string collector = string.Empty;
int count = 1;
long m = 0;
Console.WriteLine("Loop Memory");
for (int i = 1; i <= 7; i++) //1, 10, 100, 1000, 10000, 100000, 1000000
{
for (int j = 0; j < count; j++)
{
collector = collector + data[j % 10];
}
//m = GC.GetTotalMemory(false);
m = Process.GetCurrentProcess().PrivateMemorySize64;
Console.WriteLine("{0,-12:d}{1:0} kb", count, m / 1024);
count *= 10;
collector = string.Empty;
}
}
static void StringBuilderMemoryTest()
{
StringBuilder collector = new StringBuilder();
int count = 1;
long m = 0;
Console.WriteLine("Loop Memory");
for (int i = 1; i <= 7; i++) //1, 10, 100, 1000, 10000, 100000, 1000000
{
for (int j = 0; j < count; j++)
{
collector.Append(data[j % 10]);
}
//m = GC.GetTotalMemory(false);
m = Process.GetCurrentProcess().PrivateMemorySize64;
Console.WriteLine("{0,-12:d}{1:0} kb", count, m / 1024);
count *= 10;
collector = new StringBuilder();
}
}
}
}

Here are the results

Execution time with string.
After 10 minutes i terminated the program.

Execution time with stringbuilder

Memory Usage - String

Memory Usage - StringBuilder

Stopwatch@MSDN

GC.GetTotalMemory@MSDN

PrivateMemorySize64@MSDN

Optimizing C# String Performance - Good article to understand string

Happy coding

Explore Google Data Center with Street View

2012-10-18T13:35:00.000-07:00

Quick introduction video

View data center with Street View

Google Maps

Detail information and amazing photos

3G vs 4G Speed Test

2012-10-17T19:10:00.001-07:00

While 3G estimated max speed is 3Mbit/s, 4G can go up to 100 Mbit/s Here are some speed tests.

A detailed comparision

ASUS Padfone

2012-10-17T18:08:00.000-07:00

Phone in tablet. An awesome design from ASUS after Taichi, laptop-tablet hybrid with two screens.

Padfone - official site

Microsoft Visual Studio / Tips 1

2012-10-17T17:50:00.000-07:00

These will make your life easier :)

Line Numbers
Go to Tools - Options - Text Editor. Select your language.

Immediate Window
Debug - Windows - Immediate Window
You can execute commands, define variables, classes and call your methods. You dont need to run your application. Detail Information - MSDN

Todo List
Start your comments with "Todo:" These comments will be showed at Task List window. The comments with start these special words in all over your solution are showed. There is also Hack and Undone markers.
To open Task List window go to View - Task List. Choose "Comments" from dropdown menu. If you choose "User Tasks", you can create tasks, assign priority and mark them as completed.
Detail information - MSDN

Refactor
Go to Refactor menu or right click and choose Refactor.
For example you can easily create properties from fields.

Custom Keyboard Shortcuts
Tools - Options - Environment - Keyboard - Assign your favorite keys

Customize Your Toolbars and Menu Items
Tools - Customize
Here you can arrange toolbars and menu items.

Code Snippets
You can easily insert pre-defined code blocks. You can design your own code snippets
Detail information - MSDN
Snippet Designer
Code Project - Create Your Own Snippets

Right click and choose Insert Snippet
Edit - IntelliSense - Insert Snippet
Right shortcut of snippet and ENTER

Open Complete Word Window ShortCut
ALT GR + Left Arrow or CTRL + Space

Complete Word Window Transparent

Press CTRL or ALT GR and hold for a while.
Its very annoying when you cant see the code behind it.

To be continued...

Happy coding

Connect MySql Database with C#

2012-10-17T15:42:00.001-07:00

First go to MySQL site and download MySQL Connector.
After you installed it, you are ready to go. Its that simple and easy.
Here is an example

Add Mysql.Data assembly reference

using System.Data;
using MySql.Data.MySqlClient;
public DataTable GetDataFromMySql()
{
DataSet ds = new DataSet();
MySqlDataAdapter da;
MySqlConnection con = new MySqlConnection("Server=your_server;Database=your_db;Uid=your_username;Password=your_password");
try
{
MySqlCommand cmd = new MySqlCommand("select * from your_table", con);
con.Open();
da = new MySqlDataAdapter(cmd);
da.Fill(ds);
}
catch
{
throw;
}
finally
{
if (con.State == ConnectionState.Open)
con.Close();
}
return ds.Tables[0];
}

Happy Coding

C# Call Constructor From Constructor

2012-10-17T15:12:00.000-07:00

public class A
{
public A() { }
public A(int i) : this() { }
public A(int i, string s) : this(i) { }
}
public class B : A
{
public B() { }
public B(int i) : base() { }
public B(int i, string s) : base(i, s) { }
}

Class A constructors call itself constructor by using this keyword. B is derived from A. Constructors of B call base constructors using base keyword.

Happy coding

C# Password Generator

2012-10-17T14:37:00.000-07:00

public static string GeneratePassword(int minLen, int maxLen, bool isUpperCase = true, bool isLowerCase = true, bool isNumber = true, bool isSymbol = true)
{
string allowedChars = string.Empty;
if (isUpperCase)
allowedChars += "ABCDEFGHIJKLMNOPQRSTUVWXTZ";
if (isLowerCase)
allowedChars += "abcdefghiklmnopqrstuvwxyz";
if (isNumber)
allowedChars += "1234567890";
if(isSymbol)
allowedChars += "!'^#+$%&/{([)]=}*?\\_-@~,;:<>";
Random rd = new Random();
StringBuilder sb = new StringBuilder();
int len = rd.Next(minLen, maxLen);
int randomIndex;
char randomChar;
for (int i = 0; i <= len; i++)
{
randomIndex = rd.Next(allowedChars.Length);
randomChar = allowedChars[randomIndex];
sb.Append(randomChar);
}
return sb.ToString();
}

Here is the result for min length = 5 and max length = 15

rsN\&,Juk
~1-?Q'~Mku
wFnElGP:L+8sA
FN#'(i
Q6oid5l
xe$iFlD
ft*kA;
)u-)Kx
o3L2fn>9
o%=2i-

Random object use seed from system clock. If you are going to create passwords consecutive in very small time interval, probably random.next will return same value. In this case define random object as a static field. Also you can pass it as parameter. Even you can seed random object by yourself but you must change seed value everytime you call. You can use a counter.

Random rd = new Random(seed);

C# GLOBALS

2012-10-15T21:20:00.001-07:00

Global values are useful to store constant values of your program or transfer values between different scopes. They can be accessed anywhere. Unfortunately there is not any predefined struct in .NET . Globals is defined using static class.

using System;
//Declare GLOBALS class in global namespace or wherever you want
public static class GLOBALS
{
public const int KEY = 5000;
public static string STATUS = "NULL";
}
namespace Test
{
class Program
{
public static void MyMethod()
{
//Do something
GLOBALS.STATUS = "MYMETHOD";
}
static void Main(string[] args)
{
Console.WriteLine("KEY:{0,10:d}", GLOBALS.KEY);
Console.WriteLine("STATUS: {0}", GLOBALS.STATUS);
Console.WriteLine();
MyMethod();
Console.WriteLine("KEY:{0,10:d}", GLOBALS.KEY);
Console.WriteLine("STATUS: {0}", GLOBALS.STATUS);
}
}
}

C# Method Return Multiple Values

2012-10-15T20:18:00.002-07:00

There are various ways return multiple values from method in .net .
First way Tuple, our new class comes with .net 4.0.

using System;
namespace Test
{
class Program
{
public static Tuple<int, string> ReturnTuple()
{
int i = 0;
string str = string.Empty;
//Do something
//There is two way to create a tuple object
return Tuple.Create(i, str);
//return new Tuple<int, string>(i, str);
}
static void Main(string[] args)
{
int myInt;
string myString;
Tuple<int, string> myTuple = ReturnTuple();
myInt = myTuple.Item1;
myString = myTuple.Item2;
Console.WriteLine("{0:d}-{1}", myInt, myString);
}
}
}

Second way use ref, out keywords.

using System;
namespace Test
{
class Program
{
public static int UseOut(out string str)
{
int i = 0;
str = string.Empty;
//Do something
return i;
}
static void Main(string[] args)
{
int myInt;
string myString;
myInt = UseOut(out myString);
Console.WriteLine("{0:d} - {1}", myInt, myString);
}
}
}

You can create your custom classes or structs and return them. These classes will include return variables.

using System;
namespace Test
{
class Program
{
public static ReturnValues ReturnCustomStruct()
{
ReturnValues rv;
int i = 0;
string str = string.Empty;
//Do something
rv.ValueInt = i;
rv.ValueString = str;
return rv;
}
static void Main(string[] args)
{
int myInt;
string myString;
ReturnValues rv = ReturnCustomStruct();
myInt = rv.ValueInt;
myString = rv.ValueString;
Console.WriteLine("{0:d} - {1}", myInt, myString);
}
}
struct ReturnValues
{
public int ValueInt;
public string ValueString;
}
}

4th way. Use List or Array

using System;
using System.Collections.Generic;
namespace Test
{
class Program
{
public static List<object> ReturnList()
{
int i = 0;
string str = string.Empty;
//Do something
return new List<object> {i,str};
}
static void Main(string[] args)
{
int myInt;
string myString;
List<object> list = ReturnList();
myInt = Convert.ToInt32(list[0]);
myString = list[1].ToString();
Console.WriteLine("{0:d} - {1}", myInt, myString);
}
}
}

Join return variables string or serialization values with a separator.

using System;
namespace Test
{
class Program
{
public static string JoinReturnValues()
{
int i = 0;
string str = string.Empty;
//Do something
//separator |
string returnValue = string.Join("|", i, str);
return returnValue;
}
static void Main(string[] args)
{
int myInt;
string myString;
string s = JoinReturnValues();
string[] sArray = s.Split(new char[] { '|' }, 2);
myInt = Convert.ToInt32(sArray[0]);
myString = sArray[1].ToString();
Console.WriteLine("{0:d} - {1}", myInt, myString);
}
}
}

If you are going to return two values you can use KeyValuePair class. There are some other ways too. We can use GLOBAL variables or XML.

Online IDEs, Editors

2012-10-15T17:08:00.001-07:00

You can write, compile, run your code online. You can do everything on your browser.

compilr.com - C, C#, C++, Java, JavaScript, Pascal PHP, Python, Ruby, VB
coderun - c#,php, javascript
shiftedit.net - PHP, Ruby, Python, Perl, Java, HTML, CSS and JavaScript
compileonline - wide range of languages
ideone - lots of
cloud-ide - web applications
codeanywhere - HTML, PHP, JavaScript, CSS, and XML
c9.io - cloud9 ide
codepad - wide variety of programming languages
writecodeonline - js php
online-php - php
amyeditor
kodingen
http://spoon.net/eclipse- java
http://ecoder.quintalinda.com
http://ace.ajax.org/ - web
http://edit.orgapage.de - php
http://chpokk.apphb.com/
http://www.landofcode.com/online-code-editor - php
closure-compiler - js (javascript)

HTML, JS, CSS editors
jsfiddle
quackit
htmledit.squarefree
onlinehtmleditor
ckeditor
htmlinstant
timsfreestuff
htmleditor
cssdesk
tryiteditor
jsbin
n2j
of course w3schools - try it yourself editor

SQL Editors
Some of them for to manage your databases (db), others are for trying
dbschemaeditor - db schemaeditor

Execute, try, test your sql queries, your skills.
sqleditor
sqlfiddle
sqlinform

These two are open source. They are at codeplex
sqlwebadmin
sqlwebtools

Demo and trial versions are available
Microsoft SQL Web Data Administrator
cibersql.com
mylittleadmin
sqlwebarchitect
tablesmarteditor

Stirling Prize goes to Sainsbury Lab

2012-10-15T13:37:00.000-07:00

Sainsbury Laboratory in University of Cambridge wins Stirling Prize 2012.
The building has been designed by Stanton Williams.

Sainsbury Lab
Stirling Prize

Skydiver Felix Baumgartner

2012-10-15T13:16:00.000-07:00

Austrian skydiver Felix Baumgartner sets record for highest skydive and fastest freefall speed. After first launch was aborted at 9 October, second try was at 14 October. Baumgartner flew approximately 39 kilometres (24 mi) into the stratosphere over New Mexico, United States in a helium balloon. He reached 833.9mph (1,342km/h) speed and breaked sound barrier. He is the only human to go faster than the speed of sound. The project is called Red Bull Stratos.

Joseph Kittinger is previous world record holder for skydiving from 31.33 km (19.4 mi).

C# Console - Press Any Key to Exit

2012-10-13T22:26:00.000-07:00

If your console program is closing immediately before you see anything then add this code to your program. It doesn't consume any system resources. When you enter something, program will exit.

string s = Console.ReadLine();

When a specific key (ex: ESC (ESCAPE)) is pressed, the program below exit.

using System;
namespace Test
{
class Program
{
static void Main(string[] args)
{
ConsoleKeyInfo k;
Console.WriteLine("Press ESC to exit...");
while (true)
{
k = Console.ReadKey(true);
if (k.Key == ConsoleKey.Escape)
break;
Console.WriteLine("{0} --- ", k.Key);
}
}
}
}

ReadKey and ReadLine functions block input. If you want to do anything until key pressed, you should use KeyAvailable property.

Console.KeyAvailable

Example

using System;
namespace Test
{
class Program
{
static void Main(string[] args)
{
ConsoleKeyInfo k;
bool bln = true;
Console.WriteLine("Press ESC to exit...");
while (true)
{
while(!Console.KeyAvailable)
{
if(!bln)
Console.WriteLine("{0:s}", "x");
bln = true;
}
bln = false;
k = Console.ReadKey(true);
if (k.Key == ConsoleKey.Escape)
break;
Console.Write("{0} --- ", k.Key);
}
}
}
}

C# Object Initializers

2012-10-13T20:36:00.001-07:00

Members of an object can be assigned without calling a constructor at creation time.

MyClass myObject = new MyClass() {MyID = 1, MyName = "John Doe"};

Example

class Program
{
static void Main(string[] args)
{
//Object initializer
MyClass myObject = new MyClass() {MyID = 1, MyName = "John Doe"};
int id =myObject.GetMyID();
string name = myObject.GetMyName();
Console.WriteLine("{0,-3:0}{1:s}",id,name);
}
}
public class MyClass
{
private int _myID;
private string _myName;
public int MyID { get; set; }
public string MyName { get; set; }
public MyClass() { }
public int GetMyID()
{
return MyID;
}
public string GetMyName()
{
return MyName;
}
}

C# Named Parameters

2012-10-13T18:58:00.001-07:00

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Test
{
class Program
{
static void Main(string[] args)
{
//calling method
DoSomething(1, "john", false);
DoSomething(1, "john");
DoSomething(id: 1, name: "john", status: false);
DoSomething(name: "john", id: 1);
DoSomething(name: "john", status: false, id: 1);
}
public static void DoSomething(int id, string name, bool status = true)
{
//Do something
}
}
}

C# Optional Parameters

2012-10-13T14:05:00.000-07:00

Optional parameters were introduced with .NET 4.0. You just only give default value these parameters.

public void DoSomething(int x, string s = "test")
{
//Do something
}

//Calling methods
DoSomething(1);
DoSomething(2, "abc");

There are other some ways to use optional parameters.
Method overloading

public void DoSomething(int x, string s)
{
//Do something
}
public void DoSomething(int x)
{
DoSomething(x, "test");
}

params keyword

public void DoSomething(params object[] obj)
{
//Do something
}

Optional attribute

using System.Runtime.InteropServices;
public void DoSomething(int x, [Optional, DefaultParameterValue("test")] string s)
{
//Do something
}

Nullable types

public void DoSomething(int? x)
{
//Check if parameter has value
if (x.HasValue)
{
//Use Value property of nullable type
int y = x.Value;
//Do something
}
else
{
//Do something
}
}

User NameValueCollection or Dictionary type parameter

Dictionary<string, object> dict = new Dictionary<string, object>();
dict.Add("x",1);
//dict.Add("s","test");
DoSomething(dict);

public void DoSomething(Dictionary<string, object>)
{
//Do something
}

Great LEGO Videos

2012-10-11T13:33:00.003-07:00

LEGO Great Ball Contraption

This man knows what he is doing. It was good times when i was building house.

Lego company story

Rymdreglage - 8-bit trip

Super Lego Mario (Level 1)

Lego Wii

Lego Mini Golf

Lego Hello World

Printer. Really???

If you are more interested LEGO , look for National Geographic Megafactories series Lego episode.

Bloodhound SSC, 1000mph car

2012-10-11T12:45:00.000-07:00


Bloodhound mock-up

Bloodhound SSC (supersonic car) faster than sound, can reach 1000mph (1600 km/h). It is being developed to break land based speed record in 2014 at 1000mph. The car has Formula 1 engine, Eurofighter jet engine and a hybrid rocket.

Bloodhound rocket tested a few a days ago in UK

Blooodhound SSC Project official page

Model Ships

2012-10-11T09:22:00.003-07:00

click for larger images

HMS Victory

Egmont

HMS Endeavour

America's Cup Columbia

Ocean liner

USS Preble

USS Constitution

HMS Victory

Albatross

Cutty Sark

Plan - Drawings

Santa Maria

Aircraft carrier

USS Constitution

HMS Vanguard

King of Mississippi

When i will retire, i will build one of these from scratch.
Here are some useful links
modelshipwrightsdatabase
modelshipworld
modelshipwrightsdatabase - articles
admiraltyshipmodels
densmodelships

Laptop tablet hybrids

2012-10-07T11:51:00.002-07:00

A laptop with touch screen, a tablet with keyboard and mouse. Hybrids
They are ultrabooks.
In laptop mode Windows traditional interface is active, when the device converted to tablet Windows new Metro interface will become active.
You can fold it, attach it, plug it, dock it, turn it even slide it.

Microsoft Surface

Surface		Surface Pro
ARM		Dual-core Intel Core i5
676 g		903 g
32 or 64 GB		64 or 128 GB
10.6 in ClearType HD
Wi-Fi (802.11 a/b/g/n)
USB 2.0, micro HDMI		USB 3.0, Mini DisplayPort
MicroSD		MicroSDXC

HP Envy x2

Intel Atom 1.80GHz Dual core
30.3 x 20.6 x 1.9 cm
1.41 kg
11.6 HD Diagonal BrightView LED-backlit IPS Display (1366 x 768)
64 GB SSD (Solid State Disk)
Intel Graphics
2 GB RAM
8 MP Rear camera
USB 2.0, HDMI, SD Card Slot
802.11 a/b/g/n/ WLAN WiFi, Bluetooth, NFC
Beats Audio with Dual Speakers
Slide from notebook to tablet and back again

ASUS Taichi

Two screens

Intel Ivy Bridge Core i7

4 GB RAM

SSD or HDD

11.6-inch or13.3-inch display

USB 3.0 Ports

DELL XPS Duo 12

Flip the screen around itself

Toshiba Satellite u925t

Core i5 processor
1.45 kg
12.5-inch
128GB SSD
DDR3 RAM
USB 3.0
HDMI
Bluetooth, NFC
Slide the display

Samsung Series 7 Slate PC

Intel Core i5

.85 kg

11.6-inch

4GB RAM

128GB SSD

Bluetooth 4.0

With S-Pen

Lenovo IdeaPad Yoga 13

Intel Core i7 processor

1.54 kg

13.3" display

SSD

4GB RAM

Fold back

Acer Iconia W510

Asus Transformer Book

Intel Core i7

11.6-inch also available 13-inch and 14-inch

SSD

5 MP camera

Maybe its a small detail but all these machines, call whatever you want, run Windows OS (Operating system) (Windows 7 or Windows 8)

Brinicle, Ice Finger of Death

2012-10-07T07:11:00.000-07:00

Ice stalactite known as Brinicle (brine icicle) has been filmed for the first time in 2011.

You can see how it was filmed here
For more information here