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SOME HYPERBOLIC SPACE FORMS WITH FEW GENERATED FUNDAMENTAL GROUPS
Cavicchioli, Alberto,Molnar, Emil,Telloni, Agnese I. Korean Mathematical Society 2013 대한수학회지 Vol.50 No.2
We construct some hyperbolic hyperelliptic space forms whose fundamental groups are generated by only two or three isometries. Each occurring group is obtained from a supergroup, which is an extended Coxeter group generated by plane re ections and half-turns. Then we describe covering properties and determine the isometry groups of the constructed manifolds. Furthermore, we give an explicit construction of space form of the second smallest volume nonorientable hyperbolic 3-manifold with one cusp.
Some hyperbolic space forms with few generated fundamental groups
Alberto Cavicchioli,Emil Molnar,Agnese I. Telloni 대한수학회 2013 대한수학회지 Vol.50 No.2
We construct some hyperbolic hyperelliptic space forms wh-ose fundamental groups are generated by only two or three isometries. Each occurring group is obtained from a supergroup, which is an extendedCoxeter group generated by plane reections and half-turns. Then wedescribe covering properties and determine the isometry groups of theconstructed manifolds. Furthermore, we give an explicit construction ofspace form of the second smallest volume nonorientable hyperbolic 3{manifold with one cusp.
Improving emergency response in the era of ADAS vehicles in the Smart City
Nicola Capodieci,Roberto Cavicchioli,Filippo Muzzini,Leonard Montagna 한국통신학회 2021 ICT Express Vol.7 No.4
Management of emergency vehicles can be fostered within a Smart City, i.e. an urban environment in which many IoT devices are orchestrated by a distributed intelligence able to suggest to road users the best course of action in different traffic situations. By extending MATSim (Multi-Agent Transport Simulation Software), we design and test appropriate mitigation strategies when traffic accidents occur within an existing urban area augmented with V2V (Vehicle-to-Vehicle), V2I (Vehicle-to-Infrastructure) capabilities and Advanced Driving Assisted cars (ADAS). Further, we propose traffic congestion models and related mechanisms for improving the necessary time for emergency vehicles to respond to accidents.
Matallana-Surget, Sabine,Douki, Thierry,Cavicchioli, Ricardo,Joux, Fabien Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.9
DNA damage and cell survival was assessed in the marine bacteria, Photobacterium angustum (GC% = 39.6) and Sphingopyxis alaskensis (GC% = 65.5) following UVB irradiation and recovery in the presence or absence of visible light. The extent of bipyrimidine photoproduct formation was analyzed by HPLC-MS/MS. S. alaskensis was chosen as a reference species since it was previously shown to be photoresistant. Interestingly, P. angustum exhibited an even higher level of survival to UVB irradiation than S. alaskensis. This higher photoresistance was associated with a decrease in the rate of formation of cyclobutane pyrimidine dimers (CPDs) at high UVB doses. Despite different distributions in UVB-induced lesions, the survival difference between the two marine bacteria could not be accounted for by qualitative differences in either photoreactivation or the rate of nucleotide excision repair of the photoproducts arising from the different bipyrimidine doublets (TT, CT, TC and CC). Dark repair was found to be much more efficient for P. angustum than S. alaskensis but the corresponding rate of photoproduct removal was lower than that observed at high UVB doses. We propose that the increased resistance of P. angustum under high UVB doses results from a UVB-induction of CPD photolyase(s) that may directly repair DNA damage and/or act indirectly by enhancing the rate of nucleotide excision repair.