20 research outputs found
Orientamenti per l'orientamento
No full textIl volume vuole ridimensionare il gap tutt'oggi esistente tra dibattito scientifico e "pratiche" di orientamento. Le ricerche e le applicazioni presentate si riferiscono a temi quali il decision-making adolescenziale, le procedure utilizzabili per approfondire la conoscenza dei processi di scelta, le problematiche connesse alla ricerca attiva di un lavoro, ecc. Scritti di L. Arcuri, C. Ballerini, A. Battistelli, D. Bavestrello, A. Bruno, C. Castelli, G. Costa, C. Dazzi, P. De Vito Piscicelli, S. Di Nuovo, G.B. Flebus, C. Ghidelli, P. Gubitta, C. Kaneklin, L. Mann, C. Marchesini, M. Mistri, M. Monaci, L. Nota, N. Paggin, M. Pastore, L. Pedrabissi, S. Pizzini, K. Polàcek, G. Sangiorgi, G. Sarchielli, C. Scarpellini, S. Soresi, T. Tegiacchi, R. Trentin, G. Vidotto. 320 pagine
Magnon Polarons in the Spin Seebeck Effect
No full textSharp structures in magnetic field-dependent spin Seebeck effect (SSE) voltages of Pt/YFeO (YIG) at low temperatures are attributed to the magnon-phonon interaction. Experimental results are well reproduced by a Boltzmann theory that includes the magnetoelastic coupling (MEC). The SSE anomalies coincide with magnetic fields tuned to the threshold of magnon-polaron formation. The effect gives insight into the relative quality of the lattice and magnetization dynamics
Design, manufacturing and alignment of a fluorescence imaging spectrometer based on refractive optics and a transmission grating
No full textScanning a DNA molecule for bound proteins using hybrid magnetic and optical tweezers
No full textThe functional state of the genome is determined by its interactions with proteins that bind, modify, and move along the DNA. To determine the positions and binding strength of proteins localized on DNA we have developed a combined magnetic and optical tweezers apparatus that allows for both sensitive and label-free detection. A DNA loop, that acts as a scanning probe, is created by looping an optically trapped DNA tether around a DNA molecule that is held with magnetic tweezers. Upon scanning the loop along the ?-DNA molecule, EcoRI proteins were detected with ?17 nm spatial resolution. An offset of 33±5 nm for the detected protein positions was found between back and forwards scans, corresponding to the size of the DNA loop and in agreement with theoretical estimates. At higher applied stretching forces, the scanning loop was able to remove bound proteins from the DNA, showing that the method is in principle also capable of measuring the binding strength of proteins to DNA with a force resolution of 0.1 pN/[Formula: see text]. The use of magnetic tweezers in this assay allows the facile preparation of many single-molecule tethers, which can be scanned one after the other, while it also allows for direct control of the supercoiling state of the DNA molecule, making it uniquely suitable to address the effects of torque on protein-DNA interactions.BN/BionanoscienceApplied Science
The DAG project, a 4m class telescope: the telescope main structure performances
No full textDogu Anatolu Gozlemevi (DAG-Eastern Anatolia Observatory) Project is a 4m class optical, near-infrared Telescope and suitable enclosure which will be located at an altitude of similar to 3.170m in Erzurum, Turkey. The DAG telescope is a project fully funded by Turkish Ministry of Development and the Ataturk University of Astrophysics Research Telescope - ATASAM. The Project is being developed by the Belgian company AMOS (project leader), which is also the optics supplier and EIE GROUP, the Telescope Main Structure supplier and responsible for the final site integration. The design of the Telescope Main Structure fits in the EIE TBO Program which aims at developing a Dome/Telescope systemic optimization process for both performances and competitive costs based on previous project commitments like NTT, VLT, VST and ASTRI. The optical Configuration of the DAG Telescope is a Ritchey-Chretien with two Nasmyth foci and a 4m primary thin mirror controlled in shape and position by an Active Optic System. The main characteristics of the Telescope Main Structure are an Altitude-Azimuth light and rigid structure system with Direct Drive Systems for both axis, AZ Hydrostatic Bearing System and Altitude standard bearing system; both axes are equipped with Tape Encoder System. An innovative Control System characterizes the telescope performance
An interferometer for high-resolution optical surveillance from geostationary orbit - space system study
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