Science Teaching (weekly)

9 08 2008



Science Teaching (weekly)

2 08 2008



Science Teaching (weekly)

26 07 2008
  • tags: PLC, PLN, Professional Learning Community, n2teaching

  • Creating a Personal Learning Communities online.

    tags: n2teaching, ustream.tv

  • What is The Levelator™?

    Do you believe in magic? You will after using The Levelator to enhance your podcast. And you’ll be amazed that it’s free, now even for commercial use.

    So what is The Levelator? It’s software that runs on Windows, OS X (universal binary), or Linux (Ubuntu) that adjusts the audio levels within your podcast or other audio file for variations from one speaker to the next, for example. It’s not a compressor, normalizer or limiter although it contains all three. It’s much more than those tools, and it’s much simpler to use. The UI is dirt-simple: Drag-and-drop any WAV or AIFF file onto The Leveler’s application window, and a few moments later you’ll find a new version which just sounds better.

    Have you ever recorded an interview in which you and your guest ended up at different volumes? How about a panel discussion where some people were close to microphones and others were not? These are the problems the post-production engineers of Team ITC here at The Conversations Network solve every day, and it used to take them hours of painstaking work with expensive and complex tools like SoundTrack Pro, Audacity, Sound Forge or Audition to solve them. Now it takes mere seconds. Seriously. The Levelator is unlike any other audio tool you’ve ever seen, heard or used. It’s magic. And it’s free.

    When we developed the IT Conversations component-based show-assembly system, we realized all the components had to be of the same loudness or the results would sound awful. We limped along for many months using the RMS normalization functions in various applications, but the results weren’t satisfactory and it required tools and skillsets that some of our post-production audio engineers didn’t have. One of our best engineers, Bruce Sharpe, offered to write a standalone software RMS normalization utility, which we’ve been using as part of our production system CNUploader since 2005.

    The CNUploader’s normalizer acts similar to an intelligent RMS-based compressor/limiter combination, and it therefore affects primarily the short-term (transient) sounds and the long-term overall loudness of the file. It doesn’t make the kind of adjustments that a skilled audio engineer can perform in software or at a mixing console, riding the levels up and down to compensate for medium-term variations.

    There are some hardware devices such as various AGC (automatic-gain control) components that can do moderate leveling, but since they have to operate in real time (i.e., without look-ahead), they can’t do much. And they aren’t cheap, let alone free. Even a skilled human can only react to changes unless s/he is lucky enough to be present during a recording session and can use visual cues to anticipate coming variations. Software can do better by performing multiple passes over the audio, generating a loudness map of where the volume changes. (It’s not actually that simple, but the metaphor is helpful.)

    Bruce, with help from his son, Malcolm, had proven that he knew how to tackle these problems in ways that no one else anywhere in the audio/software industry has done to date. So we asked him, “Bruce, do you you think you can write a leveler that corrects for medium-term variations in loudness instead of the short-term and long-term variatons processed by compressor/limiters and normalizers, respectively?” Bruce and Malcolm took on the challenge, and eight months later we began testing The Levelator.

    You’ll believe in magic.

    tags: audio, software, podcast, podcasting, tools, freeware, tool, mp3

  • Wordle is a toy for generating “word clouds” from text that you provide. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes. The images you create with Wordle are yours to use however you like. You can print them out, or save them to the Wordle gallery to share with your friends.

    tags: visualization, web2.0, cloud

  • tags: no_tag

    • And often those users or customers have no desire to be “engaged”. They simply want to buy the product, use it, and move on.
  • I like this page. It shows how the classroom looks, not just words!

    tags: no_tag

  • tags: 1-1, classroom-management, laptop

  • This page provides concise information on emerging learning technologies and related practices. Each brief focuses on a single technology or practice and describes:

    tags: emerging learning technologies, 1 to 1 Learning, 1to1, 1:1

  • tags: traits

  • tags: hunt




Science Teaching (weekly)

19 07 2008
  • tags: earth, googleearth, places, sharing

    • Sharing Data Over a Network

      In addition to saving placemarks or folders to your local computer, you can also save place data to a web server or network server. Other Google Earth users who have access to the server can then use the data. As with other documents, you can create links or references to KMZ files for easy access. Storing a placemark file on the network or on a web server offers the following advantages:

      • Accessibility - If your place data is stored on a network or the Web, you can access it from any computer anywhere, provided the location is either publicly available or you have log in access.
      • Ease in Distribution - You can develop an extensive presentation folder for Google Earth software and make that presentation available to everyone who has access to your network storage location or web server. This is more convenient than sending the data via email when you want to make it persistently available to a large number of people.
      • Automatic Updates/Network Link Access - Any new information or changes you make to network-based KMZ information is automatically available to all users who access the KML data via a network link.
      • Backup - If for some reason the data on your local computer is corrupt or lost, you can open any of the KMZ files that you have saved to a network location, and if so desired, save it as a local file again.
      Note: Before you can create a network link to an item in Google Earth, you must first store that place data on a server.

      This section covers the following topics:




Science Teaching (weekly)

12 07 2008



NECC 2008 Through Distance Learning

8 07 2008

And yet another summer passes sans attending the mega ed tech conference NECC.

No, I will not be bummed out by not have the seeming unlimited funds of districts around the our nation. Districts that sent hordes of eager participants to this years bash at San Antonio. I will not get any cheese with my whine. On the positive side, I have been lapping up the scraps and crumbs of leftovers from NECC. I have found streaming video http://www.kzowebcasting.com/necc/ and the best part is that I could fast forward through the presenters crowd warm-ups, self-promos, shout-outs, and even parts without audio. Would I pay for this? No. Would I recommend it to others. Absolutely! The chat feature is wonderful. Send you fellow teachers a link to the site on Twitter or IM or Plurk, or Pownce and have them comment and give feedback while viewing a particular presentation. Now, I have been a fan of David Warlick for many years and always love to listen to his presentations. Here is how I see sharing these videos with my fellow teachers in my school.

Set up a Professional Development schedule. Maybe call it NECC via Distance Learning, or Converge, Connect, and Transform Learning. Then, using our email server, set up a group of teachers interested in earning credits in technology. From this group of names, have them create a Pownce account. The reason for using Pownce, is that users can setup Events. When the time for the training comes, send the group a link to one of the NECC webcasts and ask the participants to post their comments and questions in the chat room. I have been impressed with backdoor chat. Our teachers would be using MacBooks, so we could launch iChat with Bonjour to connect the laptops. Now, will our wifi handle the streaming or will we encounter buffering issues? That may be the “$24,000 Question”.

Other cool “take-aways” that I have picked up include Edtags.org. Edtags.org is a social bookmarking site for educators. Diigo and Del.icio.us are great bookmarking site that I use all the time, but they are blocked by our content filter at school. Edtags.org is unblocked and is now high on my personal list of sites to use. I lacks lots of the numbers of users that the other great social bookmarking sites have, and that is fine. I have been busy adding my bookmarks in Edtags.org and marking them for use by my friends only. This way, I can add teachers in my school as users and add them as my friend so they can access my educational bookmarks and add another tool to our learning community.

Mogulus.com is really exciting. However, it does not make the cut of the content filter in our district. It is also flagged for inappropriate content.

I will not be so bold as to consider this to be a master list of tools for the classroom. Hopefully, I will be able to find time to post additional resources.




Science Teaching (weekly)

5 07 2008



Science Teaching (weekly)

28 06 2008



Wes Fryer and Crew

27 06 2008

Geek EduSquad?

Wow, this is awesome. Can you name all the technology skills they are using in this video?

  • Computer:  what brand?
  • Software and apps?
  • Cell phones?
  • camera?

Update: This morning, I noticed that Wes has done a super job filling in the details concerning the “Live from I-35: Moving at the Speed of Creativity enroute to NECC” event! Even after reading about it, I am blown away by how slick and interesting it really was.




Science Teaching (weekly)

21 06 2008