1,721,046 research outputs found
Caratterizzazione Strutturale e Configurazionale di Composti Policiclici a Ponte mediante Tecniche di Risonanza Magnetica Nucleare
No full textDesymmetrization of meso 7-aza-2,3-bis(phenylsulfonyl) bicyclo[2.2.1]hept-2-ene: a re-examination. Kinetic resolution of racemic 3-arylsulfonyl-7-aza-2-bromobicyclo[2.2.1]hepta-2,5-dienes
No full textDiastereoselective Desymmetrization of Meso Bis(phenylsulfonyl) Polycyclic Alkenes Promoted by C2 Symmetric Chiral Diolates: Direct Access to Optically Pure Ketals and Ketones
No full textNuove acquisizioni sull'impiego di bicicli solfonilici rigidi in sintesi organica e in studi di riconoscimento molecolare
No full textSulla base degli aspetti cardine descritti precedentemente e degli studi condotti su bicicli
solfonilici rigidi negli ultimi anni, saranno presentati i più recenti risultati ottenuti, soprattutto per
quanto concerne a) la reattività di alcheni biciclici come accettori di Michael in presenza di
ammine chirali e b) la costruzione di famiglie di analoghi a scheletro [2.2.x]biciclico e
benzo[2.2.1]biciclico, adatte alla elaborazione di modelli di riconoscimento chirale di tipo
empirico, basati su analisi cromatografica (HPLC)
Stereoselective Desymmetrization: Role of Symmetry, Stereofacial Discrimination and Steric Effects
No full textComposti Policiclici Bridged Fenilsolfonilsostituiti: Caratterizzazione mediante Tecniche NMR e Cromatografia Liquida ad Alte Prestazioni (HPLC)
No full textBlending of Floating Car Data and Point-Based Sensor Data to Deduce Operating Speeds under Different Traffic Flow Conditions
Full text linkNowadays, smart mobility can rely on innovative tools for the knowledge of road system conditions, like operating speed data extracted from the so-called Floating Car Data (FCD). Probe vehicles in the traffic flow send to operation centres a large amount of travel information, collected through GPS detection systems, especially with regard to geolocation, date and time, direction and speed. As the sample deriving from these vehicles represents a tiny portion of the entire vehicular fleet, in this paper an analysis and a comparison with data obtained by point-based traffic sensors is proposed.Therefore, the study analyses data collected by inductive loop detectors and microwave radar sensors, that provide information on the entire traffic flow in the time domain, in particular with the aim to identify free flow speed time bands. Afterwards, by means of the fusion between the results obtained from the data coming from these point-based control units and the ones coming from the probe vehicles, a comparison of the operating speeds in the two conditions of constrained and unconstrained traffic flow is performed
Speed data collection methods: a review
Full text linkVarious studies have been focusing on a wide range of techniques to detect traffic flow characteristics, like speed and travel times. Therefore, a key aspect to obtain statistically significant set of data is to observe and record driver behaviours in real world. To collect traffic data, traditional methods of traffic measurement - such as detection stations, radar guns or video cameras - have been used over the years. Other innovative methods refer to probe vehicles equipped with GPS devices and/or cameras, which allow continuous surveys along the entire road route. While point-based devices provide information of the entire flow, just in the section in which they are installed and only in the time domain, probe vehicles data are referred both to temporal and space domains but ignore traffic conditions. Obviously, it is necessary that the data collected refer to representative samples, by number and composition, of the user population. The paper proposes a review of the most used methods for speed data collection, highlighting the advantages and disadvantages of each experimental approach. Accordingly, the comparison illustrates the best relief method to be adopted depending on the research and investigation that will be performed
Risolvibilità di Substrati Policiclici Chirali su Chiralcel OD-H e Chiralpak OT(+): Ipotesi sui Meccanismi di Interazione Selettore-Selettando
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