Tag Archives: jiscri

ERA field trip at Plymouth ‘GEES Learning and Teaching’ conference

On-site video feed at Devon Great Consols.

On July 7th, the ERA team and our Plymouth University GEES collaborators John Maskell, Paul Lunt, Jason Truscott, Matt Sharples and Alison Stokes demonstrated the use of remote learning with ERA technology at the Devon Great Consols site. A minibus load of delegates from both the GEES Subject Centre 10th Anniversary Conference and the GEES Early Career Lecturers Workshop were shown a remote investigation of the site, delivered by John Maskall and Paul Lunt, with Matt Sharples as camera operator.

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Plymouth University trials ERA

Remote students at Devon Great Consols

At the end of June, we conducted some experiments to evaluate the performance of ERA-assisted fieldwork compared to the same fieldwork task being performed by students visiting the site directly. Four groups of students volunteers visited Devon Great Consols to perform an Environmental Impact Assessment (EIA) task related to a fictional plan to exploit metals available in the waste heaps on the site, left over from its time as an arsenic extraction plant in the late 19th and early 20th centuries.

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ERA introduction video

Here’s a 2 minute video we produced for our field trials in Plymouth as an introduction to the ERA project.

ERA Introduction Video, 14MB download, x264. Will play with VLC or Quicktime.

ERA visits Plymouth to demonstrate at GEES

ERA 'Student' set-up at Devon Great Consols mine

On Monday 29th March (2010) we (John and Trevor) visited the Higher Education Academy’s Geography, Earth and Environmental Sciences Subject Centre based at the University of Plymouth. We met with John Maskall and Jason Truscott, and showed them the portable wireless network toolkit we’ve been developing in ERA.

Here is a video clip and some photos from the demo we did at the Devon Great Consols Mine.

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Portable VoWLAN: A portable voice over wireless local area network for mobile learning

Screen shots

Chris on Whitby foreshore testing voice and video; note headset and external camera, with field antennae in the background

Trevor testing a pair of Asterisk servers

Tutor and students at the ERA base location viewing the video feed and communicating via VoIP with the field geologist. Howick, Friday 07 August 2009

A portable wireless network used to improve access to geology field work locations

Description

The Portable VoWLAN Toolkit is a battery-powered wireless local area network, optimised for voice and video data. Developed for use in university geology field courses, the toolkit provides a 802.11g WiFi network, a VoIP telephony server, and streaming video. During a field trip students and lecturers can use VoIP softphones to talk to one another, and any web standards compliant browser to view streaming video and collected photos. Although developed to improve student access to geology fieldwork, the resulting generic toolkit can be applied to support any mobile learning context where live communication is required.

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Nokia LD-3W with Ricoh Caplio 500SE

Nokia LD-3W GPS module - a test shot taken at The Open University. The GPS location from the LD-3W is automatically included in the image file on the camera.

We’ve just tried a Nokia LD-3W bluetooth GPS dongle with the Ricoh Caplio 500SE camera we’ve been using for taking photographs – and it rocks.

The LD-3W paired with the Ricoh bluetooth really easily (using the default PIN of 0000), the GPS signal details are then displayed on the camera’s LCD display and when an image is taken the current GPS co-ordinates are stored in the resulting image’s EXIF metadata. The battery in the GPS dongle seems to last all day and can be charged either using the car-charger cable that came with the device or a standard mains Nokia (skinny connector) phone charger.

This is a really easy way to GPS stamp our photos and for the money (£24.96 inc VAT) we’re very pleased with it.

Ubuntu 9.10 and Bluetooth audio.

Following the release of the new 9.10 ‘Karmic Koala’ version of Ubuntu, we installed it on one of the Asus 901s, trying out a new configuration of all ext4 disk partitions and no swap partition. Discovering that the ‘Netbook Remix’ (UNR) release of the operating system now could only use the mobile phone look-alike interface and had the Desktop-Switcher package removed, we followed forum advice and tried the full Ubuntu 9.10 release instead. Having disabled the ‘wobbly windows’ graphics enhancements in Gnome, Ubuntu 9.10 was no trouble on the Asus 901 – all the devices worked from the start, dialogue and menu boxes fitted in the available screen area by default. One of the main reasons for trying Ubuntu 9.10 was to experiment with an early desire of ERA to use the bluetooth audio headsets commonly available for mobile phones instead of wired mic-and-headphones devices. With our Ubuntu 9.04 UNR installations we couldn’t get this to work, despite spending a frustrating day or two in early July with the latest software then available. At that time, improved bluetooth interaction with beta Pulseaudio releases and experimental device control with Blueman were not integrated into Ubuntu releases, but promised to make bluetooth audio as simple under Ubuntu as it is on a mobile phone.

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Cheap IP cameras: the Edimax IC-3010WG

A much cheaper solution for IP video than the Axis Q7401, the Edimax IC-3010WG network camera is only £80 from use-IP.co.uk. For your money, you get a white plastic camera with a choice of wired or wifi network connections with a maximum resolution of 640×480 at 30fps. Video streams are available in either M-JPEG or MPEG-4, with a built-in microphone and 3.5mm audio-output jack. The lens is fixed focal length and autofocus down to about 25-30cm, there is a reverse-SMA connector for the supplied wifi antenna on top of the unit and a 1/4″W standard camera tripod thread unusually placed on the back. Continue reading →

First look at the Axis video encoder.

Axis Q7401 Status Lights

Yesterday was our first opportunity to take the brand new Axis Q7401 video encoder for a test drive. It’s a well engineered and rugged unit which takes composite video and turns it into an M-JPEG or h.264 MPEG-4 stream. The Q7401 can be powered by either 12v DC or PoE, has an SDHC slot for recording video straight to flash memory, audio inputs and outputs, a serial interface for remotely controlling camera movements and an I/O connector for (e.g) plugging in sensors, or switching lights and buzzers. Continue reading →

Trunking calls between Asterisk servers with IAX2.

Trevor testing a pair of Asterisk servers

At the end of last week we managed to create an IAX to IAX trunk between 2 asterisk servers on the local wired LAN. IAX trunking is a way to connect multiple Asterisk servers and allow clients of different servers to place calls to each other. Continue reading →