Author Archives: martin

Google I/O 2011

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I consider myself lucky, getting one of the ~5000 Tickets for this year’s Google I/O, which sold out in 59 minutes. We heard exciting news about the next Version of Android “Ice Cream Sandwich”, which will fuse the latest Phone and Tablet Operating Systems Gingerbread and Honeycomb. On Day 2 Google announced the shipment of Chromebooks from different manufacturers. Chrome OS is Google’s Client system for Cloud based computers. Traditionally – like every year – attendants got a huge gift pack. I have to admit, I have never been so thrilled at a Technology Conference.

For full details about Google I/O, check out their excellent online session catalogue: Google I/O 2011.

Below you find my personal picture story:

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AquaChem at BlackBerry App World

AquaChem

AquaChem

I am very excited to announce, that as of today, AquaChem is available in the BlackBerry App World. AquaChem is a handy tool to solve common Aquatic Chemistry equations for determination of Activity Coefficients, Ionization Fractions and Equilibrium Constants. The application provides students with a simple means of performing laborious calculations, the underlying chemistry of the problem being studied can be the primary focus rather than the calculations.
Get it at BlackBerry App World

Get it at BlackBerry App World


AquaChem at BlackBerry App World

AquaChem at BlackBerry App World

AquaChem for the BlackBerry PlayBook

AquaChem

AquaChem

Research in Motion announced: everyone who submits an application for the BlackBerry PlayBook by March 15, would receive a free PlayBook tablet. Since I am very excited about the BlackBerry PlayBook, it’s Hardware, and it’s underlying QNX realtime operating system and I am waiting for it to appear on the market, a free Tablet is enough incentive to look into how to code for the PlayBook as an early adopter. I implemented AquaChem – an Adobe Air application – from scratch, after spending a couple of hours going through a comprehensive tutorial with Source Code.

Links:

AquaChem is based on the idea of iChem. The purpose of the application is to bring Aquatic Chemistry on modern Handheld devices to the classroom. AquaChem has just been submitted to the BlackBerry App World.

Creating Depth Images with the Kinect Sensor.

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Microsoft’s Kinect Sensor is a nice peace of Hardware and considerably cheap for a camera that also provides a 640×480 depth image. Soon after it appeared on the market in November 2010, it was reverse engineered for users to interface it from the computer without the Xbox 360.

Technology Enthusiasts and Roboticists all over the world picked up a Kinect to see what they can do with it. My personal motivation is to improve Perception for my Service Robot. Shortly after the publication of the Kinect Hack, Microsoft and PrimeSense decided to release an official SDK: the OpenNI Framework.

Below are the first Depth Images and User Tracking Images, that I took with the official SDK. 

Stealing your Facebook made easy

Eric Butler published an easy to use Firefox extension which captures session cookies from broadcast media such as public wifi networks. It allows anyone, to collect Facebook, Twitter, Flickr, etc session cookies and do anything with these accounts with just a click.

http://codebutler.com/firesheep

This is scarily easy!

I hope social network providers start implementing end-to-end encryption via https soon. Until then, be careful from where you access your social networks. On the other hand easy identity stealing brings social networking to a new level. 😉

Intel Developer Forum 2010

This year’s Intel Developer Forum from September 13th to 15th was all about Data Center Applications, Cloud Computing, and Embedded Systems. I was happy about the opportunity to present a Poster about my Leonardo Robot Project in the academic track. The conference was accompanied by Intel’s AppUp Elements developer meeting which occurred for the first time this year.

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iChem

iChem Logo

iChem

iChem is a case study to bring aquatic chemistry calculations on the iPhone to the classroom. The computational nature of aquatic chemistry lends itself well to the iPhone platform and by providing students with a simple means of performing laborious calculations, the underlying chemistry of the problem being studied can be the primary focus rather than the calculations.

The application features Activity Coefficient, Ionization Fraction and Equilibrium Constant computations. The goal is to provide a user friendly tool for chemistry students, which enables them to quickly solve standard computations on their fingertips. The tool will be made available to the public, soon.

iChem Screenshots

iChem Screenshots

[1] Martin Wojtczyk, Mark A. Nanny, and Chetan T. Goudar. Aquatic Chemistry on the iPhone: Activity Coefficient, Ionization Fraction and Equilibrium Constant determination. In 239th American Chemical Society National Meeting & Exposition, San Francisco, USA, March 2010.

Sync your Motorola C390 with iSync for free

Motorola C390

Recently my SonyEricsson cellphone broke and I wanted to replace it by my Bluetooth enabled Motorola C390. Apple’s iSync is really great to keep your address book and calendar in sync with your cellphone. Unfortunately the C390 is not supported by default. Your Mac can pair with the phone and use it for data connections but iSync does not support it, see [1].

There seem to be some commercial solutions which may help, though I didn’t test one of them, just search the web for iSync and C390 and you will find them.

iSync C390

Luckily I also found this guy’s Howto in a forum about adding Motorola C390 support to iSync for free just by modifying a xml file [2]. However, since I am running Mac OS X 10.4.9, I recognized slight changes in the xml tag names. That’s why I noted the instructions below.

Enabling Motorola C390 for iSync

  • Right click on the iSync Application
  • Show Package Contents
  • Goto Contents/Plugins/ApplePhoneConduit.syncdevice/Contents/ Plugins/PhoneModelsSync.phoneplugin/Contents/ Resources
  • Backup and modify the MetaClasses.plist file to make it look like below in the beginning
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>com.motorola.C390</key>
    <dict>
        <key>Identification</key>
        <dict>
            <key>com.apple.gmi+gmm</key>
            <string>"Motorola CE, Copyright 2000"+C390</string>
        </dict>
        <key>InheritsFrom</key>
        <array>
            <string>com.motorola.usb-bt.0x22B8/0x4902</string>
        </array>
            <key>Services</key>
        <array>
            <dict>
                <key>ServiceName</key>
                <string>com.apple.model</string>
                <key>ServiceProperties</key>
                <dict>
                    <key>ModelIcon</key>
                    <string>MOTC390.tiff</string>
                    <key>ModelName</key>
                    <string>C390</string>
                </dict>
            </dict>
        </array>
    </dict>
</dict>
  • You will need a tiff file, with the name you entered under ModelIcon, but you can just copy it from another one in the same folder as the MetaClasses.plist file
  • Start iSync
  • Select Devices->Add Device from the menu
  • et voilà, your Motorola C390 should show up as a supported phone

I synced my address book and calendar successfully with it, so I don’t know, why the phone is not supported by default. Anyways, use at your own risk.