87,296 research outputs found
Full dimensional potential energy function and calculation of state-specific properties of the CO+N2 inelastic processes within an open molecular science cloud perspective
Get PDFA full dimensional Potential Energy Surface (PES) of the CO + N2 system has been generated by extending an approach already reported in the literature and applied to N2-N2 (Cappelletti et al., 2008), CO2-CO2 (Bartolomei et al., 2012), and CO2-N2 (Lombardi et al., 2016b) systems. The generation procedure leverages at the same time experimental measurements and high-level ab initio electronic structure calculations. The procedure adopts an analytic formulation of the PES accounting for the dependence of the electrostatic and non-electrostatic components of the intermolecular interaction on the deformation of the monomers. In particular, the CO and N2 molecular multipole moments and electronic polarizabilities, the basic physical properties controlling the behavior at intermediate and long-range distances of the interaction components, were made to depend on relevant internal coordinates. The formulated PES exhibits substantial advantages when used for structural and dynamical calculations. This makes it also well suited for reuse in Open Molecular Science Cloud services
Facendo saltare le parole : sulle ‘scritture vocali’ di Gabriella Bartolomei
No full textThis essay aims to investigate the original experience of the performative nexus between words / images and vocalism / music, which characterizes the work of the actress Gabriella Bartolomei. Her performances are striking evidence of the diffusion of Neo-Avant-Garde artistic experiments, even outside a clear belonging to specific cultural movement. Indeed, Bartolomei performs texts of other authors through a system of iconic rewriting (‘scritture vocali’), which is very similar to the experiences of visual poetry because she uses the same techniques of drawing, painting, and collages. In both cases, the iconic arrangement of the graphic and alphanumeric signs has a hermeneutical, mnemonic, and creative purpose. Only after having iconically translated the text to be interpreted is Bartolomei able to make a vocal performance
Vibrational Energy Transfer in CO+N 2 Collisions: A Database for V-V and V-T/R Quantum-Classical Rate Coefficients
Get PDFKnowledge of energy exchange rate constants in inelastic collisions is critically required for accurate characterization and simulation of several processes in gaseous environments, including planetary atmospheres, plasma, combustion, etc. Determination of these rate constants requires accurate potential energy surfaces (PESs) that describe in detail the full interaction region space and the use of collision dynamics methods capable of including the most relevant quantum effects. In this work, we produce an extensive collection of vibration-to-vibration (V–V) and vibration-to-translation/rotation (V–T/R) energy transfer rate coefficients for collisions between CO and N2 molecules using a mixed quantum-classical method and a recently introduced (A. Lombardi, F. Pirani, M. Bartolomei, C. Coletti, and A. Laganà, Frontiers in chemistry, 7, 309 (2019)) analytical PES, critically revised to improve its performance against ab initio and experimental data of different sources. The present database gives a good agreement with available experimental values of V–V rate coefficients and covers an unprecedented number of transitions and a wide range of temperatures. Furthermore, this is the first database of V–T/R rate coefficients for the title collisions. These processes are shown to often be the most probable ones at high temperatures and/or for highly excited molecules, such conditions being relevant in the modeling of hypersonic flows, plasma, and aerospace applications
Quale male? Quale Dio?
No full textA partire da un’ampia disamina delle varie piste e direzioni seguendo le quali la filosofia ha sempre di nuovo cercato di portare a pensiero il male, e sottolineando come questo sia un tema centrale e non voluttuario dell’esercizio filosofico, il saggio si concentra a confrontarsi criticamente con la concezione propria di Luigi Pareyson e sviluppata dalla sua scuola, e specialmente da Claudio Ciancio, concernente il nesso tra male, Dio, libertà. In particolare, l’attenzione si concentra sul rapporto tra male e peccato e sulla possibilità di attribuire male e peccato a Dio, mettendo in questione la concezione stessa sia di Dio sia del male, soggiacente a tale impostazione della pensabilità del loro rapporto
Superscan-Like Pattern on 18F-Choline PET/CT in a Patient With Essential Thrombocythemia
No full textFew clinical and preclinical articles reported the potential usefulness of F-18-choline PET/CT in several hematological proliferative diseases. We report and incidental finding of a superscan-like pattern in a patient affected by essential thrombocythemia (ET), performing F-18-choline PET/CT for a biochemical recurrence of prostate cancer. The mild elevation of PSA values and the negativity of subsequent Ga-68-PSMA-11 PET/CT allowed to correlate the diffuse skeletal uptake detected on F-18-choline PET/CT to the underlying hematologic disease, rather than to a prostate cancer relapse
DIPLYCOSIA BARTOLOMEI (ERICACEAE), A NEW SPECIES FROM THE PHILIPPINES
No full textA new species of Diplycosia (Ericaceae), Diplycosia bartolomei Ferreras & Argent, presently known only from Mt. Mingan in the border region between Aurora and Nueva Ecija provinces in Luzon, Philippines, is described. Comments on possible relationships and differences from other Philippine species are given.</jats:p
Parkinson's disease study with virtual week manipulated for emotional valence
No full textObjective: This study investigated the effect of Parkinson's disease (PD) on prospective memory (PM) tasks with varying the emotional content of the PM actions. Background: Prospective memory, or remembering to carry out previously formed intentions at the appropriate moment, is a complex cognitive construct that has received increasing attention in PD. PM dysfunctions in PD patients can be very frustrating and limit patients’ everyday independence. Previous studies conducted with healthy older adults have demonstrated that presenting stimuli with emotional content (negative and positive valence) affect PM performance in the way that stimuli with emotional valences are better remembered compared with neutral stimuli. Methods: Twenty‐one older adults with PD (M=9, F=12) without diagnosis of dementia, and 25 healthy older adults (M=10, F=15) took part in the present study. Virtual Week task, a computer based memory task that simulates everyday prospective memory activities was used. Participants performed three virtual days in which they were required to remember to perform 8 PM actions. We manipulated the emotional content of the PM actions so participants every virtual day performed actions with positive (i.e. “tell Roberta that Maria had a baby girl when you talk to Roberta”), negative (i.e. “visit your friend at the hospital when you go shopping”) or neutral (“buy the bus tickets after breakfast”) content. Immediately following each virtual day, participants completed a recognition test to assess their retrospective memory for the various prospective memory tasks. Participants also performed a complete neuropsychological evaluation. Results: PD patients were less accurate than controls and there was also a main effect of emotional valence indicating that all participants were more accurate on positive PM tasks than both negative and neutral. Participants did not differ on negative compared to neutral PM tasks. Thus there was a positive enhancement effect but no negative enhancement or impairment when comparing PM performance on emotionally valence tasks with neutral tasks. To clarify the impact of emotional valence positivity and negativity enhancement/impairment indexes were calculated, the positivity enhancement was greater than zero for participants with Parkinson's. Conclusions: Our study confirmed PM impairment in PD patients and extended previous findings showing how emotional valence can manipulate PM performance
CoCoNet: towards coast to coast networks of marine protected areas (from the shore to the high and deep sea), coupled with sea-based wind energy potential
No full textThis volume contains the main results of the EC FP7 “The Ocean of Tomorrow” Project CoCoNet, divided in two sections: 1) a set of guidelines to design networks of Marine Protected Areas in the Mediterranean and the Black Seas; 2) a smart wind chart that will allow evaluating the possibility of installing Offshore Wind Farms in both seas. The concept of Cells of Ecosystem Functioning, based on connectivity, is introduced to define natural units of management and conservation. The definition of Good Environmental Status, as defined in the Marine Strategy Framework Directive, is fully embraced to set the objectives of the project, by adopting a holistic approach that integrates a full set of disciplines, ranging from physics to bio-ecology, economics, engineering and many sub-disciplines. The CoCoNet Consortium involved scientist sfrom 22 states, based in Africa, Asia, and Europe, contributing to build a coherent scientific community
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