2,373 research outputs found
A Berger type normal holonomy theorem for complex submanifolds
No full textWe prove a kind of Berger-Simons' Theorem for the normal holonomy group of a complex submanifold of the projective spac
Holonomy and submanifold geometry
No full textWe survey applications of holonomic methods to the study of submanifold geometry, showing the consequences of some sort of extrinsic version of de Rham decomposition and Berger's Theorem, the so-called Normal Holonomy Theorem. At the same time, from geometric methods in submanifold theory we sketch very strong applications to the holonomy of Lorentzian manifolds. Moreover we give a conceptual modern proof of a result of Kostant for homogeneous space
Emulation is the most sincere form of flattery : retro videogames, rom distribution and copyright
No full textThe Internet has made it possible for amateur game creators to collaborate on projects irrespective of geographical location. The success of projects such as Minecraft, and even CounterStrike, demonstrates that ‘indie’ developers can create entertainment products just as popular and successful as mainstream developers with huge budgets. However, many individuals instead are more interested in the old than the new – reliving past experiences through the playing of old videogames that are no longer commercially sold. Through the creation of emulators, and the ripping of ROM images (data that allows for the playing of an emulated videogame, such as Super Mario Bros. on the Super Nintendo), games with nostalgic value can be easily distributed, played and replayed. In addition, this allows for the preservation of legacy content that may otherwise be consigned to the ‘dustbin of history’. However, irrespective of the effort and ingenuity that goes into the creation of emulation software, and the effort involved in ripping ROM data to make old games playable, are these pursuits entirely legal? The purpose of this paper is to consider the compatibility of such projects with pre-existing norms of intellectual property law, comparing and contrasting the approaches of US and EU IP regimes in their handling of emulators and ROMS. The paper will analyse the issue under pre-existing legislation and with regard to relevant case law, seeking to draw conclusions on whether the existing regimes in copyright law are compatible and satisfactorily balance the right of videogame publishers to seek fair remuneration for their work with the desire by enthusiasts to preserve and relive a form of creative culture
La cartografia geologica in Calabria nel XIX secolo
No full textIt is a widely diffused opinion that the knowledge of the geologic features of the Calabrian territory may be referred to the early XX century; nevertheless, a thorough investigation carried out in the cartographic collection of the ISPRA Library, that preserves the historical heritage of the Geological Survey of Italy, allowed to access and analyze original XIX century maps of undoubted scientific interest. The precursor of all 'modern' geological studies in Calabria was Leopoldo Pilla, who analyzed the relationships between the intrusive units and sedimentary successions in the '30s, soon after followed by the German naturalist Rodolfo A. Philippi. Appended to a handwritten Italian translation of a paper of Philippi we have found some geological sketches of the Calabrian region; despite their uncertain attribution, they most likely represent preparatory drafts for a final publication, and are, to date, the first known geological maps of the region. After the mentioned pioneers, up to the '70s, only few authors dealt with the geology of Calabria, and a surprising finding of our research was the discovery of a map and a document drawn up by S. Giancossi, which was however almost ignored by the scientific community. The interest for the geology of Calabria was renewed in the '70s of the XIX century, first by Gerhard vom Rath and then by Vincenzo Rambotti. Subsequently and until the end of the XIX century, just prior to the publication of the Calabrian sheets of the official cartographic map at 1:100,000 scale of the Geological Survey of Italy, many projects of geological mapping were carried out by several geologists, including Carlo De Stefani, Renato Fucini, Giuseppe Seguenza and, above all, Domenico Lovisato. Between 1878 and 1881 Lovisato, appointed by the Royal Geological Committee, realized a geological map in 32 sheets of Northern Calabria on the 1:50,000 scale, that represents the first geological map of the region conceived in a modern way. Undoubtedly, this work was the milestone for the production of the official cartography, realized since 1895 under the direction of Emilio Cortese
Tools for integrating diagnosis in the design process an application to the Common Rail air and fuel delivery systemsC
No full textThe development of diagnostic software is very critical in current generation automotive systems. However, the activities related to diagnosis (e.g., FMEA generation, analysis of diagnosability, generation of software to be embedded in the ECU) are usually not supported by specialized tools and, as a consequence, not strictly integrated with other design phases (e.g., design of control and definition of control strategies and software). In this paper we discuss how the design process can be re-organized including the activities above by using a set of tools which support the activities themselves. The work originated from the IDD1 project, which was started in 2000 with the goals of bringing diagnostic related activities to the core of the design process, by providing designers with a set of tools to perform these activities. After sketching the reengineered design process, we present the implemented tools and we briefly comment on the application to the common rail air and fuel delivery system
Slide checkout console
No full textSemiautomatic 35-mm photographic slide checkout console optically and electronically verifies registration of slides at a minimum rate of 250/hr. The console compares slide registration with a registration standard within the console. It verifies a binary code number on the bottom of the slide and visually displays its equivalent
Circuit Bodging: Atari Punk Console
No full textCircuit bodging is back! Maxwell is proud to present small, simple, but ultimately lovable little circuits to build for your own, personal pleasure. In this edition we are featuring: The Atari Punk Console. The Atari Punk Console (or APC) is a 555 timer IC based noise maker circuit. The original was designed by Forrest M. Mims III, and published in his book “Engineer’s Mini-Notebook - 555 Circuits” (Siliconcepts, 1984). It uses two 555 timers to create a variable pulse width oscillator with a similar sound to the infamous Atari 2600.Electrical Engineering, Mathematics and Computer Scienc
Anemocory dispersal model of Caralluma europaea (Guss.) N.E.Br. in the Island of Lampedusa
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