i-ETC : ISEL Academic Journal of Electronics Telecommunications and Computers
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Social Mobility Advisor
Full text linkSeamless access to updated information about mobility options is a key factor for sustainable economic development. In this context, the adoption of information systems, with innovative features, meet these needs by stimulating the interest and curiosity of end users. There are well known difficulties, even for regular travelers, to get the most suitable mobility options combining available transport modes. Also, the sustainable mobility has become the new imperative for transport policy. In this paper we present a collaborative platform that supports a Social Network, in which users can search and share sustainable mobility experiences. This platform includes a reputation and a recommender systems specially designed to deal with mobility options
PHOTODETECTION, SELF AMPLIFICATION AND DEMUX OPERATION IN TANDEM AMORPHOUS SI-C DEVICES
Full text linkIn this paper we report the use of a monolithic system that combines the demultiplexing operation with the simultaneous photodetection and self amplification of the signal. The device is a double pi’n/pin a-SiC:H heterostructure with optical gate connections for light triggering in different spectral regions. Results show that when a polychromatic combination of different pulsed channels impinges on the device the output signal has a strong nonlinear dependence on the light absorption profile, (wavelength, bit rate and intensity). This effect is due to the self biasing of the junctions under unbalanced light generation of carriers. Self optical bias amplification under uniform irradiation and transient conditions is achieved. An optoelectronic model based on four essential elements: a voltage supply, a monolithic double pin photodiode, optical connections for light triggering, and optical power sources for light bias explains the operation of the optical system
i-ETC - Launching a New Open Access Academic Journal
Full text linkThis paper introduces the general editorial policy of i-ETC, a new online Open Access Journal. The publication of this academic journal is based on the software Open Journal System and it is maintained by the Department of Electronics, Telecommunications and Computer Engineering (DEETC), at the High Institute of Engineering of Lisbon (ISEL) in Lisbon
Function and Meaning: The Double Aspects of Technology
Full text linkThis paper traces the theoretical background to the split between function and meaning in the modernity theories of Marx, Lukács, Weber and Marcuse. It then discusses attempts to overcome the split in the recent philosophies of technology of Simpson and Borgmann. These attempts fail but help to focus the issue. A discussion of contemporary struggles over information technology offers a more hopeful perspective on a possible resolution of the split and suggests a new look at Heidegger’s phenomenology of action. The conclusion of the paper shows that Heidegger offers resources for addressing the relation of function and meaning which he himself did not develop