SOW: Digitization and longterm preservation of weather maps at ZAMG

The targets of this concept are: delivering a catalog of requirements; the evaluation of tools; possible file formats (e.g. FITS) necessary for digitization and longtime preservation of the historical weather maps at ZAMG (Central Institute for Meteorology and Geodynamics, Austria's national weather and geophysical service

Re-representation as work design in outsourcing : a semiotic view

Outsourcing work relies on the supplier’s interpretation of the work delegated by the client. Existing streams of outsourcing literature tend to assume that the supplier should use the same convention as the client to make sense of the work package. In this research, we use a semiotic lens to challenge this assumption by viewing such sensemaking as a process of decoding symbolic representations. This complementary view involves innovative use of digital technology for re-representing the outsourced work through new conventions. We studied a Chinese business process outsourcing supplier in-depth to learn how such re-representation is achieved through the creation of special-purpose languages. Our research contributes to the Information Systems outsourcing literature by providing a semiotic view on the design of outsourcing work supported by digital technologies. Three re-representation practices (i.e., dissociating the signifiers, signifying through new conventions, and embedding new conventions in the digital infrastructure) constitute the core of this view. The results are highly significant for outsourcing theory and practice, not least since they suggest that the use of semiotics and visuals for re-representation may enable suppliers to reformulate outsourcing work and the expertise needed to deliver services

A Three – tier bio-implantable sensor monitoring and communications platform

One major hindrance to the advent of novel bio-implantable sensor technologies is the need for a reliable power source and data communications platform capable of continuously, remotely, and wirelessly monitoring deeply implantable biomedical devices. This research proposes the feasibility and potential of combining well established, ‘human-friendly' inductive and ultrasonic technologies to produce a proof-of-concept, generic, multi-tier power transfer and data communication platform suitable for low-power, periodically-activated implantable analogue bio-sensors. In the inductive sub-system presented, 5 W of power is transferred across a 10 mm gap between a single pair of 39 mm (primary) and 33 mm (secondary) circular printed spiral coils (PSCs). These are printed using an 8000 dpi resolution photoplotter and fabricated on PCB by wet-etching, to the maximum permissible density. Our ultrasonic sub-system, consisting of a single pair of Pz21 (transmitter) and Pz26 (receiver) piezoelectric PZT ceramic discs driven by low-frequency, radial/planar excitation (-31 mode), without acoustic matching layers, is also reported here for the first time. The discs are characterised by propagation tank test and directly driven by the inductively coupled power to deliver 29 μW to a receiver (implant) employing a low voltage start-up IC positioned 70 mm deep within a homogeneous liquid phantom. No batteries are used. The deep implant is thus intermittently powered every 800 ms to charge a capacitor which enables its microcontroller, operating with a 500 kHz clock, to transmit a single nibble (4 bits) of digitized sensed data over a period of ~18 ms from deep within the phantom, to the outside world. A power transfer efficiency of 83% using our prototype CMOS logic-gate IC driver is reported for the inductively coupled part of the system. Overall prototype system power consumption is 2.3 W with a total power transfer efficiency of 1% achieved across the tiers

"The Experimental Film Remake and the Digital Archive Effect: A Movie by Jen Proctor and Man with a Movie Camera: The Global Remake"

This essay explores the notion of the experimental film “remake” and the different spectatorial experiences that arise in watching a canonical experimental film and its digital remake. By examining A Movie by Jen Proctor and Man with a Movie Camera: The Global Remake in relation to their originals, this essay reflects on the different effects produced by these films made in the cinematic and digital eras, respectively, as a result of the different archives of documents available for appropriation and recontextualization at each historical moment. Indeed, I suggest that the original films produce a “material archive effect” while the remakes produce a “digital archive effect,” these effects occurring at the levels of both form and content. I argue that these films offer a point of entry for thinking about how cinematic and digital technologies have each differentially shaped human experience of the “real” as its representation is appropriated and recontextualized

An XML-based Multimedia Middleware for Mobile Online Auctions

Pervasive Internet services today promise to provide users with a quick and convenient access to a variety of commercial applications. However, due to unsuitable architectures and poor performance user acceptance is still low. To be a major success mobile services have to provide device-adapted content and advanced value-added Web services. Innovative enabling technologies like XML and wireless communication may for the first time provide a facility to interact with online applications anytime anywhere. We present a prototype implementing an efficient multimedia middleware approach towards ubiquitous value-added services using an auction house as a sample application. Advanced multi-feature retrieval technologies are combined with enhanced content delivery to show the impact of modern enterprise information systems on today’s e-commerce applications

BioVault : a protocol to prevent replay in biometric systems

D.Com. (Informatics)Please refer to full text to view abstrac

Celestial sources for random number generation

In this paper, we present an alternative method of gathering seed data for random number generation (RNG) in cryptographic applications. Our proposed method utilises the inherent randomness of signal data from celestial sources in radio astronomy to provide seeds for RNG. The data sets were collected from two separate celestial sources, and run through the SHA-256 algorithm to deskew the data and produce random numbers with a uniform distribution. The resulting data sets pass all tests in the NIST Statistical Test Suite for random data, with a mean of 98.9% of the 512 total bitstreams from the two sources passing all tests in the NIST suite, as well as further testing in R. These results are on par with the control set generated using Java’s SecureRandom function. An explanation of the sources, the data processing and detailed results of each of the tests are presented