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Dust properties across the CO snowline in the HD 163296 disk from ALMA and VLA observations
Guidi, G.,Tazzari, M.,Testi, L.,de Gregorio-Monsalvo, I.,Chandler, C. J.,Pé,rez, L.,Isella, A.,Natta, A.,Ortolani, S.,Henning, Th.,Corder, S.,Linz, H.,Andrews, S.,Wilner, D.,Ricci, L.,Carpenter, Springer-Verlag 2016 Astronomy and astrophysics Vol.588 No.-
Giuseppe Guidi,Salvatore D"Arco,Jon Are Suul,Ryosuke Iso,Jun-Ichi Itoh 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper presents a system configuration for transformer-less grid integration of large-scale charging infrastructures for electric vehicles (EVs) with wireless inductive charging. The proposed configuration relies on a Modular Multilevel Converter (MMC) topology as the grid interface of the charging infrastructure, where one wireless EV charger can be supplied from each individual module. This system topology could provide significant reduction in footprint and complexity of cable installations by allowing for transformer-less connection and direct integration with the medium voltage distribution grid. The requirements for power flow management when charging EVs that are unevenly distributed within the infrastructure are evaluated analytically. On this basis, a control strategy is presented for ensuring horizontal and vertical energy balancing among the MMC arms, and voltage balancing among the modules of each arm. Time-domain simulations demonstrate how the system can operate with severe unbalances resulting from different number and location of charging EVs.
Driving Performance Experimental Analysis of Series Chopper Based EV Power Train
Kawamura, Atsuo,Guidi, Giuseppe,Watanabe, Yuki,Tsuruta, Yukinori,Motoi, Naoki,Kim, Tae-Woong The Korean Institute of Power Electronics 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.6
In this paper, the series chopper based power train for electric vehicle is proposed for aiming the increase of one battery charge driving distance. Both the motor test bench based experiments and the chassis dynamo based experiments are tested and then analyzed for EV driving performance that the proposed power train with SAZZ chopper and Quasi-PAM control scheme is compared with or without the series chopper. It is confirmed through two kinds of experimental analyses that the series chopper power train for EV can be useful to extend the driving distance if the high efficiency and the low weight of chopper are satisfied.
Driving Performance Experimental Analysis of Series Chopper Based EV Power Train
Atsuo Kawamura,Giuseppe Guidi,Yuki Watanabe,Yukinori Tsuruta,Naoki Motoi,Tae-Woong Kim 전력전자학회 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.6
In this paper, the series chopper based power train for electric vehicle is proposed for aiming the increase of one battery charge driving distance. Both the motor test bench based experiments and the chassis dynamo based experiments are tested and then analyzed for EV driving performance that the proposed power train with SAZZ chopper and Quasi-PAM control scheme is compared with or without the series chopper. It is confirmed through two kinds of experimental analyses that the series chopper power train for EV can be useful to extend the driving distance if the high efficiency and the low weight of chopper are satisfied.
Jon Are Suul,Salvatore D"Arco,Giuseppe Guidi 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This paper presents a single-phase Virtual Synchronous Machine (VSM) and its possible application for providing Vehicle-to-Grid (V2G) services from domestic battery chargers of Electric Vehicles (EVs). In a VSM, the power converter is controlled to emulate the inertia and the damping effect of a synchronous machine. Thus, a VSMbased EV charger can contribute to the spinning reserve and frequency regulation of the power system. In case of grid outages, the VSM can seamlessly establish an islanded grid and supply local loads from the battery onboard the EV. In order to avoid the influence on the virtual inertia from power oscillations associated with a single phase circuit, the proposed control scheme relies on a virtual twophase system for calculating active and reactive powers. The proposed VSM implementation is described in detail and its dynamic performances in grid-connected as well as standalone operation are demonstrated by numerical simulations and by laboratory experiments.
Catalfo, Alfio,Bracchitta, Giuseppina,De Guidi, Guido Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.10
The aromatic amino acid tryptophan is the most susceptible protein residue involved in various photosensitized adverse effects. Of these processes, the tryptophan photosensitization induced by methylene blue has been well studied. A predominant type II photosensitizing activity, mediated by singlet oxygen, has been already demonstrated on various models. The purpose of this study is to compare this photosensitization system with that induced by naproxen, belonging to the class of non-steroidal anti-inflammatory drugs. For this compound, a type I (radical) and type II (singlet oxygen) cooperative mechanism of photoinduced damage was previously proposed. This study represents an example of testing drugs on the simple experimental model of amino acid residues in proteins. Particular emphasis is dedicated to modifications caused by the formation of drug photomediated toxic species, such as reactive oxygen species (ROS). This is achieved following the kinetics of photodegradation of the sensitizers and of the amino acid, as well as the formation of their photoproducts and by evaluation of quantum yields of the various processes. Tryptophan photoproducts represent biomarkers of oxidative damage indicative for protein photooxidation and for the molecular mechanism of photosensitization; some of these have been identified for the first time as UVA photosensitization products. The pattern of Trp photoproducts formed by the two compounds differs and is specific for each type of sensitization process. These observations support extending the investigation to systems of increasing molecular complexity, that is Trp in isolated proteins and in cells and represent an effort to provide a simplified rationale of the complex picture coming out from literature data and our experimental results.
Francesca Perondi,Claudio Brovida,Gianila Ceccherini,Grazia Guidi,Ilaria Lippi 대한수의학회 2018 Journal of Veterinary Science Vol.19 No.3
Three dogs were evaluated for severe hyperproteinemia and hyperglobulinemia secondary to Leishmania infantum. Double filtration plasmapheresis (DFPP) was performed in two dogs at days 1, 2, and 6 after presentation. The third dog received DFPP at days 1 and 3 after presentation and eleven hemodialysis treatments. Significant reduction in serum total protein (p < 0.0001), alpha-1 (p = 0.023), alpha-2 (p = 0.018), gamma globulins (p = 0.0105), and a significant increase in albumin/globulin ratio (p = 0.0018) were found. DFPP may be a promising therapeutic technique for rapid resolution of signs of hyperproteinemia in dogs affected by L. infantum.
Four quadrant SAZZ-1 Chopper for EV and HEV power train
Yukinori Tsuruta,Martin Pavlovsky,Giuseppe Guidi,Atsuo Kawamura 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper discusses four quadrant SAZZ-1 chopper (Snubber Assisted Zero Voltage and Zero Current Switching) and its direct application to a EV (Electric Vehicle) power train. The performance of SAZZ-1 chopper is demonstrated on several prototypes. The first prototype is a 25 ㎾, 50 ㎑ SAZZ-1 with efficiency in the range between 96 % and 97 %. This was further improved by a redesigned SAZZ-1 chopper which reached even higher efficiency in the range of 97 % to over 98 %. Further on, a new mid-power 30 ㎾ water cooled SAZZ-1 chopper was constructed for KAST (Kanagawa Academy of Science and Technology) advanced EV project. This prototype was used and fully tested in an EV prototype named KAST-EVKana. As discussed, SAZZ-1 topology proved to be well performing in direct EV application.
Pozzetto, Silvia,Capone, Mauro,Cherubini, Nadia,Cozzella, Maria Letizia,Dodaro, Alessandro,Guidi, Giambattista Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.4
Most of irradiated graphite that should be disposed comes from moderators and reflectors of nuclear power plants. The quantity of irradiated graphite could be higher in the future if high-temperature reactors (HTRs) will be deployed. In this case noteworthy quantities of fuel pebbles containing semi-graphitic carbonaceous material should be added to the already existing 250,000 tons of irradiated graphite. Industry graphite is largely used in industrial applications for its high thermal and electrical conductivity and thermal and chemical resistance, making it a valuable material. Irradiated graphite constitutes a waste management challenge owing to the presence of long-lived radionuclides, such as <sup>14</sup>C and <sup>36</sup>Cl. In the ENEA Nuclear Material Characterization Laboratory it has been successfully designed a procedure based on the exfoliation process organic solvent assisted, with the purpose of investigate the possibility of achieving graphite significantly less toxic that could be recycled for other purpose [1]. The objective of this paper is to evaluate the possibility of the scalability from laboratory to industrial dimensions of the exfoliation process and provide the prototype of a chemical plant for the treatment of irradiated graphite.