scrying_rotterdam workshop presentation

how we talk about this stuff

decoding a landscape

science/EVP/EIP

modelling perception

parallel landscaping - overlap. bridge physical and protocol

and hardware integration [GPS, ADC, DAC, 2 serials, SPI, memory access]

The scrying walk could be described as an active demonstration of the mapping of electromagnetic [EM] resonances and intensities in the centre of (old) Gijon.

The presentation, walk, and subsequent demonstration of interpretative and analytical techniques attempt to explore and map a novel twinned architecture of power lines, hidden substance, signal transmission and reception. Scrying engages mutely with the subtle interactions between physical constructions, communication technologies (wireless networks, mobile phone networks, RFID, television, radio, radar), power lines and lines of transmission, biological phenomena, and geologic properties (such as the earth's magnetic field).

Informed both by psychogeographic play (the city flaneur) and techniques of geophysical archaelogy scrying attempts to divine both a past and future (of) Gijon.

Code is modulated and broadcast by AM or FM transmitters from covert, city-wide, solar-powered scrying stations. scryers move through the city [with devices] - code runs and is modified by architectural and urban EM environmental issues.

Local Resonance Amplifiers (LRA) are parasitic city devices (PCD) which amplify and dislocate wide band electromagnetic (EM) emissions or signals. Mushroomed LRA devices serve as mute witness, creating significant physical and symbolic imbalances within complex city-wide spectral ecologies: subtle interactions between physical constructions, communication technologies (wireless networks, mobile phone networks, RFID, television, radio, radar), power lines and lines of transmission, biological phenomena, and geologic properties.

Re-mapping techniques/methods from the discipline of archaeological geophysics to use present EM emissions to divine the (hidden) past of an urban location.

For example: EM conductivity, Magnetometers, Ground-penetrating radar (GPR)

for architectural EIP

1] CPU (Central Processing Unit) module: language-based [Scheme] interpreter, power regulation and unmediated antenna (code access)

power regulation/memory/bus connections

2] RSSI (Received Signal Strength Indication) module: for complex signal/data analysis in the spectral domain.

3] Spectrum analysis module: examining 2.4 GHz spectrum.

4] Computer connection module: the transceiver. Allowing less than divine USB connectivity to the CPU board.

5] Power modules: for use with a range of supply sources including regulated solar power (allowing unattended computational city installation).

6] GPS module: Global Position log for mapping scrying derives.

1] Low power radio transceiver module: for mobile, mesh network play within the city

2] High power radio receiver and transmitter module: for long distance remote connection and control.

3] Random bit generation: for transmission

(logging, LRA, spectrum analysis)

with hardware integration under the following commands:

[gpsread] [returns parsed lat/long - should be recoded to return a list which we can pull apart!]

[adcread channel number]

[memwrite bank (1 of 8) address value] [returns T]

[memread bank address] [returns value]

[dacwrite value]

;; use also with M-x serial-term and C- C-j line mode with history

(defun serial-send-region () (interactive) (let ((tmper (buffer-substring (region-beginning) (region-end)))) (switch-to-buffer (find-file-noselect "/tmp/scrying.transfer")) (erase-buffer) (insert tmper) (save-buffer "/tmp/scrying.transfer") (start-process "scrying-upload" nil "/root/scrying/scrying/scrying.sh")))

cantenna (waveguide antennas)

http://www.turnpoint.net/wireless/cantennahowto.html

http://flakey.info/antenna/waveguide/ [with calculator for waveguide distances and so on]

[use of tetrapaks was also successfully tested in Berlin: 7cm diameter, 21.5 long means antenna is 31mm high and 69mm in from the end of the pak]

http://www.reseaucitoyen.be/wiki/index.php/BoiteDeLait

http://www.reseaucitoyen.be/wiki/index.php/Home\_made - good resource

http://www.saunalahti.fi/~elepal/antenna2.html - also with link to calculator

http://www.vk2zay.net/article.php/43

http://polonai.se/logper/

http://www.ewh.ieee.org/soc/es/Nov1998/13/LPARRAY/LPDA.HTM

Calculator: http://www.fortunecity.com/skyscraper/jolt/345/LogCalc.html

http://1010.co.uk/181209.log

http://1010.co.uk/19gpslog

http://1010.co.uk/fast\_arms18th

# make sure all data is tabbed and good

# C-c C-r to send region to gnuplot

set parametric
unset key
set style data line
set surface
#set contour both
#set cntrparam bspline
set dgrid3d 30,30,10
splot "/root/projects/scrying_rotterdam/19gpslog" using 1:2:3

help dgrid3d

# flat heat map

unset surface
unset contour
set view map
set pm3d at b
set dgrid3d 30,30,10
splot "/root/2310test.log" using 1:2:3

help splot

# for line style plot (a la plot3)

unset view map
set ticslevel 0
set surface
unset contour
unset pm3d
unset dgrid3d 
splot "/root/projects/scrying_rotterdam/19gpslog" using 1:2:3 with lines