Google Colab – Python notebooks

Google’s Colaboratory, or “Colab” for short, allows you to write and execute Python in your browser, with

  • Zero configuration required
  • Free access to GPUs
  • Easy sharing

Whether you’re a student, a data scientist or an AI researcher, Colab can make your work easier. Watch Introduction to Colab to learn more, or just get started below!

The platform allows quick testing of python code and fast execution in your browser. They have tutorials for machine learning, pandas, tensor flow, and other programming goodies.

The format is very similar to the Jupyter site where you can run a python notebook online to try your code. You can also install the Jupyter notebook or Jupyter Lab on your computer. Python notebooks allow documentation of code to teach other’s usage.

You can also use Colab to document and share interactive engineering calculations without requiring the recipient to install software.

Wabbitemu TI Calculator Emulator

Wabbitemu TI Calculator Emulator

Developed By Spencer Putt, Chris Shappell, and James Montelongo

For Windows and Mac OS X and Android

From the project site:

  • Wabbitemu – An accurate emulator/debugger for the TI-73, TI-81, TI-82, TI-83, TI-83+(SE), TI-84+(SE), TI-84+CSE, TI-85, and TI-86
  • SPASM – The fastest Z80 assembler with extra features supporting TI calculator development
  • Wabbitcode – An integrated development environment with auto-complete, syntax-highlighting, and comprehensive source-level debugging

Available on the Google Play Store

Wabbitemu creates a Texas Instruments graphing calculator right on your Android device. Wabbitemu supports the TI-73, TI-81, TI-82, TI-83, TI-83 Plus, TI-83 Plus Silver Edition, TI-84 Plus, TI-84 Plus Silver Edition, TI-85, and TI-86. Fast and convenient, Wabbitemu allows you to always have your trusty calculator with you. Because Wabbitemu is an emulator, the calculator it creates will act exactly like the real thing.
Wabbitemu, like all emulators, requires a ROM image. Wabbitemu includes an easy to use setup wizard that will help you create a ROM image for your TI.

If you need to make a ROM, you can download it from your calculator.  If you need help try clicking on appropriate link below:

TI 73 ROM, TI 81 ROM, TI 82 ROM, TI 83 ROMTI 84 ROMTI 85 ROMTI 86 ROM

 

Excel Tip: Convert Number to Text

Here are four basic ways to convert a number in a cell to text.

Method (1) Format Cells

1) Right click cell(s) of interest and click on “Format Cells…”

2) Under the Number tab Choose Text as your Category

Method (2) Text function

1) use the TEXT function.  It has the formatting of =TEXT(Value,Format)

For example, =TEXT(42.6,”0.00″) returns 42.60 as a text value.  The formatting is the same as that used in the Format Cells dialogue box.

Method (3) Concatenation with &

Using the ampersand (&), you can concatenate text.  For example, the formula =”a”&”b” returns ab.  If you concatenate any text to a number (including a null text such as “”) it will return a text value.  So, typing the formula =””&70.0 returns 70 as a text.  Note the formatting isn’t as convenient as using the TEXT function.

Method (4) Text to Columns

Choosing Data -> Text To Columns from the menu will let you convert your numbers to text.  When the dialogue opens up just follow the steps in the Wizard:

Step 1) Choose Delimited and click Next.

Step 2) Tab delimited and click Next.

Step 3) Choose Text as your Coumn Data Format and click Finish.

How Do I Average In Excel?

 

Capture

A very common question for Excel is, “How do I average in Excel?”  The simplest way to do this is to use the AVERAGE function.  In the example to the left, cell A5 has the following formula:

 =AVERAGE(A1:A3)

This returns the Average (mathematical mean) of the three numbers in the range from A1 to A3 inclusively.  You can check it by computing (2+3+6)/3 = 3.667.

If you are at the bottom of a column of numbers that you want to average just type

=AVERAGE(

in the cell that you want to show the average in.  Before hitting the ENTER key, select the range of cells you want to include in the average.  The formula will finish filling in the range and last parenthesis for you after you hit Enter.

Typing the formula below will  give the same results as the example, but won’t update when you change any other cells:

=AVERAGE(2,3,6)

Of course, if you want other types of mathematical averages other than the mean (which AVERAGE returns), then the MEDIAN and MODE functions are also available.  They work similarly to AVERAGE, but return their respective mathematical counterparts of central tendency.  Other tips and advanced averaging functions are available from Microsoft’s help website such as these:

  • If you want to include logical values and text representations of numbers in a reference as part of the calculation, use the AVERAGEA function.
  • If you want to calculate the average of only the values that meet certain criteria, use the AVERAGEIF function or the AVERAGEIFS function.

How to Apply Wind Loads in RISA-3D – RISA News

RISA News has come with a new tutorial on applying wind loads.

Wind loads can be automatically are generated in RISA-3D for building models. RISA calculates the ASCE 7 Main Wind-Force Resisting System loads and calculations are based on the Analytical Procedure for Enclosed Rigid Building for All Heights.

The model has to have a Rigid Diaphragm in order to calculate the wind loads at each floor level.

To apply the wind loads select the Insert drop down menu and select Wind Load. This will open the Wind Load Generator, where you can add all the parameters based on you building location and conditions. The Base Elevation can be used to set the “ground elevation or the lowest point of wind exposure. This is helpful if you are modeling the basement level of the building.

[via]

Blender 2.62 Relased

Blender 2.62 has been released.  Some new features include better Boolean operations, Cycles render engine improvements, object motion tracking, and more.

The Blender Foundation and online developer community is proud to present Blender 2.62. The 2.6x series is being targeted at including all work that happened in branches or patches past years.

The Cycles render engine now has layers/passes, you can track objects inside videos now, have much better and faster boolean intersections and use great new UV Tools.

Check the list for highlights and the full changelog.

You can download your copy at their website.

[via Blender.org]

Solve Differential Equations with Wolfram Alpha

Wolfram Alpha now solves differential equations with step-by-step solutions!  They describe the new feature accordingly:

Wolfram|Alpha has become well-known for its ability to perform step-by-step math in a variety of areas. Today we’re pleased to introduce a new member to this family: step-by-step differential equations. Differential equations are fundamental to many fields, with applications such as describing spring-mass systems and circuits and modeling control systems.

From basic separable equations to solving with Laplace transforms, Wolfram|Alpha is a great way to guide yourself through a tough differential equation problem.

See examples and more on the Wolfram Alpha Blog.

How to Append or Merge Multiple Models Together in RISA-3D

RISA News has posted a how-to on appending and merging multiple models into a single model file.

RISA-3D allows you to append, or merge, multiple models into a single model file. This may be helpful if you model single floors in separate files and want to stack them together.

Before appending the files together you must be sure that each file has the same Units and Global Axesdefined. Once this has been verified, open a model and go to File > Append. Then choose the model you wish to add to the currently open model.

via [RISA News]

 

New Release LEAP Bridge V11.00.00

Leap Bridge has released V11.00.00.  For list of enhancements and additions visit their product update page

LEAP Bridge V8i Enterprise is a consolidation of all configurations of LEAP Bridge (i.e. LB Suite, LB Precast and LB Cast-in-Place). This single executable integrates CONSPAN, RC-PIER, CONBOX and GEOMATH. LEAP Bridge V8i Enterprise also consolidates all country codes (currently USA, Canada and India) into one application and installer.

[Via]